Performance information

• Impact of Nigrospora oryzae-Derived Natural Products on Photosynthesis and Oxidative Stress in Eichhornia crassipes.　　　　　　　　　　　　　　　
  Chamroon Laosinwattana; Nutcha Manichart; Pattharin Wichittrakarn; Kaori Yoneyama; Montinee Teerarak; Hataichanok Passara
  Physiologia plantarum, Volume：177, Number：1, First page：e70104, Feb. 2025, [Reviewed], ［International magazine］
  Interest in natural herbicides has been growing due to government policies restricting synthetic herbicide use in many countries. In that regard, this study investigates the potential of Nigrospora oryzae extract as a natural herbicide against the aquatic invasive weed Eichhornia crassipes. A stable formulation was developed with a droplet size of 36.44 ± 0.36 nm and a zeta potential of -62.59 mV. Pot-based experiments revealed the N. oryzae extract induced 38.33% phytotoxicity within 24 hours, increasing to 84.72% by 28 days post-treatment. Scanning electron microscopy demonstrated morphoanatomical changes in epidermal tissue and stroma of E. crassipes, such as erosion of epicuticular waxes and degeneration of epidermis cells. The treatment significantly reduced the photosynthetic pigment content while increasing hydrogen peroxide (46.26%), malondialdehyde (17.49%), and proline (19.16%) levels, causing cellular electrolyte leakage. Activities of superoxide dismutase, catalase, ascorbate peroxidase, and guaiacol peroxidase were significantly elevated (p<0.05), indicating oxidative damage. These findings demonstrate that N. oryzae extract can disrupt growth and photosynthesis and induce oxidative stress in E. crassipes, suggesting its potential as a source of natural herbicide for industrial application.
  English, Scientific journal
  DOI：https://doi.org/10.1111/ppl.70104
  DOI ID：10.1111/ppl.70104, PubMed ID：39901629, PubMed Central ID：PMC11791469
• Evolution of interorganismal strigolactone biosynthesis in seed plants　　　　　　　　　　　　　　　
  Anqi Zhou; Annalise Kane; Sheng Wu; Kaibiao Wang; Michell Santiago; Yui Ishiguro; Kaori Yoneyama; Malathy Palayam; Nitzan Shabek; Xiaonan Xie; David C. Nelson; Yanran Li
  Science, Volume：387, Number：6731, First page：eadp0779, Jan. 2025, [Reviewed], ［International magazine］
  Strigolactones (SLs) are methylbutenolide molecules derived from β-carotene through an intermediate carlactonoic acid (CLA). Canonical SLs act as signals to microbes and plants, whereas noncanonical SLs are primarily plant hormones. The cytochrome P450 CYP722C catalyzes a critical step, converting CLA to canonical SLs in most angiosperms. Using synthetic biology, we investigated the function of CYP722A , an evolutionary predecessor of CYP722C . CYP722A converts CLA into 16-hydroxy-CLA (16-OH-CLA), a noncanonical SL detected exclusively in the shoots of various flowering plants. 16-OH-CLA application restores control of shoot branching to SL-deficient mutants in Arabidopsis thaliana and is perceived by the SL signaling pathway. We hypothesize that biosynthesis of 16-OH-CLA by CYP722A was a metabolic stepping stone in the evolution of canonical SLs that mediate rhizospheric signaling in many flowering plants.
  American Association for the Advancement of Science (AAAS), English, Scientific journal
  DOI：https://doi.org/10.1126/science.adp0779
  DOI ID：10.1126/science.adp0779, ISSN：0036-8075, eISSN：1095-9203, PubMed ID：39818909
• Nitrogen deficiency influences strigolactone levels in basal parts of shoots and shoot branching phenotype in Arabidopsis thaliana.　　　　　　　　　　　　　　　
  Riko Sakioka; Kaori Yoneyama
  Bioscience, biotechnology, and biochemistry, Dec. 2024, [Reviewed], [Corresponding], ［International magazine］
  Strigolactones (SLs) are allelochemicals attracting both symbiotic arbuscular mycorrhizal (AM) fungi and root parasitic plants and a novel class of phytohormones inhibiting lateral shoot branching. In general, nutrient deficiency significantly promotes SL production in roots and exudation into the rhizosphere, and also induces suppressed shoot branching phenotype in host plants of AM fungi including rice, tomato, maize, etc. Nutrient deficiencies also inhibit the shoot branching in Arabidopsis thaliana (hereafter Arabidopsis), a non-host of AM fungi, while the level of carlactone, a non-canonical SL and the SL precursor for the other SLs, was reported to be unaffected. Because Arabidopsis SLs including CL and methyl carlactonoate,, are highly unstable, relationships between SL levels and shoot branching in Arabidopsis remain elusive. Herein, we demonstrate that nitrogen deficiency increases SL levels in the basal part of shoots in Arabidopsis and lateral shoot branching appears to be strongly regulated by these SLs.
  English, Scientific journal
  DOI：https://doi.org/10.1093/bbb/zbae185
  DOI ID：10.1093/bbb/zbae185, PubMed ID：39657996
• Oxidative damage in Echinochloa crus-galli seeds exposed to Diaporthe sp. (Diaporthales, Ascomycota) fungal extract during germination　　　　　　　　　　　　　　　
  Naphat Somala; Nutcha Manichart; Chamroon Laosinwattana; Pattharin Wichittrakarn; Kaori Yoneyama; Montinee Teerarak; Nawasit Chotsaeng
  FRONTIERS IN AGRONOMY, Volume：6, Nov. 2024, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.3389/fagro.2024.1456168
  DOI ID：10.3389/fagro.2024.1456168, eISSN：2673-3218, Web of Science ID：WOS:001373236600001
• Barley is a potential trap crop for root parasitic broomrape weeds.　　　　　　　　　　　　　　　
  Maiko Inoue; Xiaonan Xie; Kaori Yoneyama
  Journal of pesticide science, Volume：49, Number：4, First page：255, Last page：261, Nov. 2024, [Reviewed], [Corresponding], ［Domestic magazine］
  Root parasitic broomrape (Phelipanche and Orobanche spp.) weeds cause devastating damage to agricultural production all around the world. The seeds of broomrapes germinate when they are exposed to germination stimulants, mainly strigolactones (SLs), released from the roots of any plant species; however, broomrapes parasitize only dicot plants. Therefore, monocots can be trap crops for broomrapes, as they induce seed germination but are not parasitized. In this study, we examined two European and one Japanese barley cultivar for their potential as trap crops for broomrapes. We found that the European cultivars, Sebastian and Golden Promise, are good potential trap crops, as they produce more SLs and exhibit higher mycorrhizal colonization rates as compared to the Japanese cultivar Shunrai.
  English, Scientific journal
  DOI：https://doi.org/10.1584/jpestics.D24-034
  DOI ID：10.1584/jpestics.D24-034, PubMed ID：39877875, PubMed Central ID：PMC11770136
• A Stereoselective Strigolactone Biosynthesis Catalyzed by a 2-Oxoglutarate-Dependent Dioxygenase in Sorghum.　　　　　　　　　　　　　　　
  Akiyoshi Yoda; Xiaonan Xie; Kaori Yoneyama; Kenji Miura; Christopher S P McErlean; Takahito Nomura
  Plant & cell physiology, Volume：64, Number：9, First page：1034, Last page：1045, Sep. 2023, [Reviewed], ［Domestic magazine］
  Seeds of root parasitic plants, Striga, Orobanche and Phelipanche spp., are induced to germinate by strigolactones (SLs) exudated from host roots. In Striga-resistant cultivars of Sorghum bicolor, the loss-of-function of the Low Germination Stimulant 1 (LGS1) gene changes the major SL from 5-deoxystrigol (5DS) to orobanchol, which has an opposite C-ring stereochemistry. The biosynthetic pathway of 5DS catalyzed by LGS1 has not been fully elucidated. Since other unknown regulators, in addition to LGS1 encoding a sulfotransferase, appear to be necessary for the stereoselective biosynthesis of 5DS, we examined Sobic.005G213500 (Sb3500), encoding a 2-oxoglutarate-dependent dioxygenase, as a candidate regulator, which is co-expressed with LGS1 and located 5'-upstream of LGS1 in the sorghum genome. When LGS1 was expressed with known SL biosynthetic enzyme genes including the cytochrome P450 SbMAX1a in Nicotiana benthamiana leaves, 5DS and its diastereomer 4-deoxyorobanchol (4DO) were produced in approximately equal amounts, while the production of 5DS was significantly larger than that of 4DO when Sb3500 was also co-expressed. We also confirmed the stereoselective 5DS production in an in vitro feeding experiment using synthetic chemicals with recombinant proteins expressed in Escherichia coli and yeast. This finding demonstrates that Sb3500 is a stereoselective regulator in the conversion of the SL precursor carlactone to 5DS, catalyzed by LGS1 and SbMAX1a, providing a detailed understanding of how different SLs are produced to combat parasitic weed infestations.
  English, Scientific journal
  DOI：https://doi.org/10.1093/pcp/pcad060
  DOI ID：10.1093/pcp/pcad060, PubMed ID：37307421, PubMed Central ID：PMC10504574
• Whispers in the dark: Signals regulating underground plant–plant interactions
  Yoneyama, K.; Bennett, T.
  Current Opinion in Plant Biology, Volume：77, Sep. 2023, [Reviewed], [Lead, Corresponding]
  Scientific journal
  DOI：https://doi.org/10.1016/j.pbi.2023.102456
  DOI ID：10.1016/j.pbi.2023.102456, ISSN：1369-5266, ORCID：152547191, SCOPUS ID：85172448411
• Ancestral sequence reconstruction of the CYP711 family reveals functional divergence in strigolactone biosynthetic enzymes associated with gene duplication events in monocot grasses　　　　　　　　　　　　　　　
  Kaori Yoneyama
  New Phytologist, Volume：235, Number：5, First page：1900, Last page：1912, Sep. 2022, [Reviewed]
  Wiley, English, Scientific journal
  DOI：https://doi.org/10.1111/nph.18285
  DOI ID：10.1111/nph.18285, ISSN：0028-646X, ORCID：119226109
• Environmental strigolactone drives early growth responses to neighboring plants and soil volume in pea　　　　　　　　　　　　　　　
  Kaori Yoneyama
  Current Biology, Volume：32, Number：16, First page：3593, Last page：3600.e3, Aug. 2022
  Elsevier {BV}, English, Scientific journal
  DOI：https://doi.org/10.1016/j.cub.2022.06.063
  DOI ID：10.1016/j.cub.2022.06.063, ISSN：0960-9822, ORCID：119226101
• Supra-organismal regulation of strigolactone exudation and plant development in response to rhizospheric cues in rice　　　　　　　　　　　　　　　
  Kaori Yoneyama
  Current Biology, Volume：32, Number：16, First page：3601, Last page：3608.e3, Aug. 2022, ［International magazine］
  Plants have evolved elaborate mechanisms to detect neighboring plants, which typically involve the perception of "cues" inadvertently produced by the neighbor.1 Strigolactones are hormonal signaling molecules2,3 that are also exuded into the rhizosphere by most flowering plant species to promote arbuscular mycorrhizal symbioses.4 Since flowering plants have an endogenous perception system for strigolactones,5 strigolactones are obvious candidates to act as a cue for neighbor presence, but have not been shown to act as such. To test this hypothesis in rice plants, we quantified two major strigolactones of rice plants, orobanchol and 4-deoxyorobanchol, in root exudates by using LC-MS/MS (MRM) and examined feedback regulation of strigolactone biosynthesis and changes in shoot branching phenotypes in rice plants grown at different densities in hydroponics and soil culture. We show that the presence of neighboring plants, or greater root volume, results in rapidly induced changes in strigolactone biosynthesis, sensitivity, and exudation and the subsequent longer-term changes in shoot architecture. These changes require intact strigolactone biosynthesis in neighboring plants and intact strigolactone signaling in focal plants. These results suggest that strigolactone biosynthesis and exudation in rice plants are driven by supra-organismal environmental strigolactone levels. Strigolactones thus act as a cue for neighbor presence in rice plants, but also seem to act as a more general root density-sensing mechanism in flowering plants that integrates soil volume and neighbor density and allows plants to adapt to the limitations of the rhizosphere.
  Elsevier {BV}, English, Scientific journal
  DOI：https://doi.org/10.1016/j.cub.2022.06.047
  DOI ID：10.1016/j.cub.2022.06.047, ISSN：0960-9822, ORCID：119226086, PubMed ID：35839765
• Germination Stimulant Activity of Isothiocyanates on Phelipanche spp.　　　　　　　　　　　　　　　
  Hinako Miura; Ryota Ochi; Hisashi Nishiwaki; Satoshi Yamauchi; Xiaonan Xie; Hidemitsu Nakamura; Koichi Yoneyama; Kaori Yoneyama
  Plants (Basel, Switzerland), Volume：11, Number：5, Feb. 2022, ［International magazine］
  The root parasitic weed broomrapes, Phelipanche spp., cause severe damage to agriculture all over the world. They have a special host-dependent lifecycle and their seeds can germinate only when they receive chemical signals released from host roots. Our previous study demonstrated that 2-phenylethyl isothiocyanate is an active germination stimulant for P. ramosa in root exudates of oilseed rape. In the present study, 21 commercially available ITCs were examined for P. ramosa seed germination stimulation, and some important structural features of ITCs for exhibiting P. ramosa seed germination stimulation have been uncovered. Structural optimization of ITC for germination stimulation resulted in ITCs that are highly active to P. ramosa. Interestingly, these ITCs induced germination of P. aegyptiaca but not Orobanche minor or Striga hermonthica. P. aegyptiaca seeds collected from mature plants parasitizing different hosts responded to these ITCs with different levels of sensitivity. ITCs have the potential to be used as inducers of suicidal germination of Phelipanche seeds.
  English, Scientific journal
  DOI：https://doi.org/10.3390/plants11050606
  DOI ID：10.3390/plants11050606, PubMed ID：35270076, PubMed Central ID：PMC8912868
• Strigolactone biosynthesis catalyzed by cytochrome P450 and sulfotransferase in sorghum　　　　　　　　　　　　　　　
  Akiyoshi Yoda; Narumi Mori; Kohki Akiyama; Mayu Kikuchi; Xiaonan Xie; Kenji Miura; Kaori Yoneyama; Kanna Sato-Izawa; Shinjiro Yamaguchi; Koichi Yoneyama; David C. Nelson; Takahito Nomura
  NEW PHYTOLOGIST, Volume：232, Number：5, First page：1999, Last page：2010, Dec. 2021
  English, Scientific journal
  DOI：https://doi.org/10.1111/nph.17737
  DOI ID：10.1111/nph.17737, ISSN：0028-646X, eISSN：1469-8137, Web of Science ID：WOS:000702893700001
• Structure-activity relationship of the aromatic moiety of 6-substituted 5,6-dihydro-2-pyrone to find the novel compound showing higher plant growth inhibitory activity.　　　　　　　　　　　　　　　
  Ryota Ochi; Kaori Yoneyama; Hisashi Nishiwaki; Satoshi Yamauchi
  Bioscience, biotechnology, and biochemistry, Volume：86, Number：2, First page：165, Last page：169, Oct. 2021, ［International magazine］
  In the course of our research on the structure-activity relationship of 5,6-dihydro-2H-pyran-2-one, (S)-6-[(R)-2-hydroxy-6-(4-fluorophenyl)hexyl]- 5,6-dihydro-2H-pyran-2-one was found to show 2-3-fold more potent plant growth inhibitory activity against Italian ryegrass shoots (IC50 = 95 μM) and roots (IC50 = 17 μM) than compound bearing unsubstituted phenyl group. The small electron withdrawing atom at 4-position of the benzene ring caused the higher activity.
  English, Scientific journal
  DOI：https://doi.org/10.1093/bbb/zbab185
  DOI ID：10.1093/bbb/zbab185, PubMed ID：34694328
• Strigolactones, how are they synthesized to regulate plant growth and development?　　　　　　　　　　　　　　　
  Kaori Yoneyama; Philip B Brewer
  Current opinion in plant biology, Volume：63, First page：102072, Last page：102072, Oct. 2021, ［International magazine］
  Strigolactones (SLs) are multifunctional plant metabolites working not only as allelochemicals in the rhizosphere, but also as a novel class of hormones regulating growth and development in planta. To date, more than 30 SLs have been characterized, but the reason why plants produce structurally diverse SLs and the details of their biosynthetic pathway remain elusive. Recent studies using transcriptomics and reverse genetic techniques have paved the way to clarify the entire biosynthetic pathway of structurally diverse SLs. In this review, we discuss how various SLs are synthesized and what SL structural diversity means for plant growth and development.
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.pbi.2021.102072
  DOI ID：10.1016/j.pbi.2021.102072, PubMed ID：34198192
• An Ancestral Function of Strigolactones as Symbiotic Rhizosphere Signals
  Kyoichi Kodama; Mélanie K. Rich; Akiyoshi Yoda; Shota Shimazaki; Xiaonan Xie; Kohki Akiyama; Yohei Mizuno; Aino Komatsu; Yi Luo; Hidemasa Suzuki; Hiromu Kameoka; Cyril Libourel; Jean Keller; Keiko Sakakibara; Tomoaki Nishiyama; Tomomi Nakagawa; Kiyoshi Mashiguchi; Kenichi Uchida; Kaori Yoneyama; Yoshikazu Tanaka; Shinjiro Yamaguchi; Masaki Shimamura; Pierre-Marc Delaux; Takahito Nomura; Junko Kyozuka
  Aug. 2021
  Abstract
  
  In flowering plants, carotenoid-derived strigolactones (SLs) have dual functions as hormones that regulate growth and development, and as rhizosphere signaling molecules that induce symbiosis with arbuscular mycorrhizal (AM) fungi. Here, we report the identification of bryosymbiol (BSB), a previously unidentified SL from the bryophyte Marchantia paleacea. BSB is also found in vascular plants, indicating that it is ancestral in land plants. BSB synthesis is enhanced at AM symbiosis permissive conditions and BSB deficient mutants are impaired in AM symbiosis. In contrast, the absence of BSB synthesis has little effect on the growth and gene expression. We show that the introduction of the SL receptor of Arabidopsis renders M. paleacea cells BSB-responsive. These results suggest that BSB is not perceived by M. paleacea cells due to the lack of cognate SL receptors. We propose that SLs originated as AM symbiosis-inducing rhizosphere signaling molecules and were later recruited as plant hormone.
  Cold Spring Harbor Laboratory
  DOI：https://doi.org/10.1101/2021.08.20.457034
  DOI ID：10.1101/2021.08.20.457034
• Evaluation and Quantification of Natural Strigolactones from Root Exudates.　　　　　　　　　　　　　　　
  Xiaonan Xie; Kaori Yoneyama; Takahito Nomura; Koichi Yoneyama
  Methods in molecular biology (Clifton, N.J.), Volume：2309, First page：3, Last page：12, 2021, ［International magazine］
  Strigolactones (SLs) in the root exudates can be detected by germination assays with root parasitic weed seeds, but precise and accurate evaluation and quantification are possible only by chemical analysis with the liquid chromatography-tandem mass spectrometry (LC-MS/MS). Here we describe methods for root exudate collection, sample preparation, and LC-MS/MS analysis of SLs.
  English, Scientific journal
  DOI：https://doi.org/10.1007/978-1-0716-1429-7_1
  DOI ID：10.1007/978-1-0716-1429-7_1, PubMed ID：34028674
• Chemical identification of 18-hydroxycarlactonoic acid as an LjMAX1 product and in planta conversion of its methyl ester to canonical and non-canonical strigolactones in Lotus japonicus.　　　　　　　　　　　　　　　
  Narumi Mori; Aika Sado; Xiaonan Xie; Kaori Yoneyama; Kei Asami; Yoshiya Seto; Takahito Nomura; Shinjiro Yamaguchi; Koichi Yoneyama; Kohki Akiyama
  Phytochemistry, Volume：174, First page：112349, Last page：112349, Jun. 2020, [Reviewed], ［International magazine］
  Strigolactones (SLs) are a group of plant apocarotenoids that act as rhizosphere signaling molecules for both arbuscular mycorrhizal fungi and root parasitic plants. They also regulate plant architecture as phytohormones. The model legume Lotus japonicus (synonym of Lotus corniculatus) produces canonical 5-deoxystrigol (5DS) and non-canonical lotuslactone (LL). The biosynthesis pathways of the two SLs remain elusive. In this study, we characterized the L. japonicus MAX1 homolog, LjMAX1, found in the Lotus japonicus genome assembly build 2.5. The L. japonicus max1 LORE1 insertion mutant was deficient in 5DS and LL production. A recombinant LjMAX1 protein expressed in yeast microsomes converted carlactone (CL) to 18-hydroxycarlactonoic acid (18-OH-CLA) via carlactonoic acid (CLA). Identity of 18-OH-CLA was confirmed by comparison of the methyl ester derivative of the MAX1 product with chemically synthesized methyl 18-hydroycarlactonoate (18-OH-MeCLA) using LC-MS/MS. (11R)-CL was detected as an endogenous compound in the root of L. japonicus.13C-labeled CL, CLA, and 18-OH-MeCLA were converted to [13C]-5DS and LL in plant feeding experiments using L. japonicus WT. These results showed that LjMAX1 is the crucial enzyme in the biosynthesis of Lotus SLs and that 18-hydroxylated carlactonoates are possible precursors for SL biosynthesis in L. japonicus.
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.phytochem.2020.112349
  DOI ID：10.1016/j.phytochem.2020.112349, PubMed ID：32213359
• Hydroxyl carlactone derivatives are predominant strigolactones in Arabidopsis.　　　　　　　　　　　　　　　
  Kaori Yoneyama; Kohki Akiyama; Philip B Brewer; Narumi Mori; Miyuki Kawano-Kawada; Shinsuke Haruta; Hisashi Nishiwaki; Satoshi Yamauchi; Xiaonan Xie; Mikihisa Umehara; Christine A Beveridge; Koichi Yoneyama; Takahito Nomura
  Plant direct, Volume：4, Number：5, First page：e00219, May 2020, [Reviewed], ［International magazine］
  Strigolactones (SLs) regulate important aspects of plant growth and stress responses. Many diverse types of SL occur in plants, but a complete picture of biosynthesis remains unclear. In Arabidopsis thaliana, we have demonstrated that MAX1, a cytochrome P450 monooxygenase, converts carlactone (CL) into carlactonoic acid (CLA) and that LBO, a 2-oxoglutarate-dependent dioxygenase, can convert methyl carlactonoate (MeCLA) into a metabolite called [MeCLA + 16 Da]. In the present study, feeding experiments with deuterated MeCLAs revealed that [MeCLA + 16 Da] is hydroxymethyl carlactonoate (1'-HO-MeCLA). Importantly, this LBO metabolite was detected in plants. Interestingly, other related compounds, methyl 4-hydroxycarlactonoate (4-HO-MeCLA) and methyl 16-hydroxycarlactonoate (16-HO-MeCLA), were also found to accumulate in lbo mutants. 3-HO-, 4-HO-, and 16-HO-CL were detected in plants, but their expected corresponding metabolites, HO-CLAs, were absent in max1 mutants. These results suggest that HO-CL derivatives may be predominant SLs in Arabidopsis, produced through MAX1 and LBO.
  English, Scientific journal
  DOI：https://doi.org/10.1002/pld3.219
  DOI ID：10.1002/pld3.219, PubMed ID：32399509, PubMed Central ID：PMC7207163
• A Rapid Method for Quantifying RNA and Phytohormones From a Small Amount of Plant Tissue.　　　　　　　　　　　　　　　
  Da Cao; Francois Barbier; Kaori Yoneyama; Christine A Beveridge
  Frontiers in plant science, Volume：11, First page：605069, Last page：605069, 2020, ［International magazine］
  Phytohormones are involved in most plant physiological processes and the quantification of endogenous phytohormone levels and related gene expressions is an important approach to studying phytohormone functions. However, the quantification of phytohormones is still challenging due to their extremely low endogenous level in plant tissues and their high chemical diversity. Therefore, developing a method to simultaneously quantify phytohormone levels and RNA would strongly facilitate comparative analyses of phytohormones and gene expression. The present work reports a convenient extraction protocol enabling multivariate analysis of phytohormones and RNA from small amounts of plant material (around 10 mg). This high-throughput ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) method demonstrates quantification of phytohormones and their related metabolites from four plant hormone classes: cytokinin, auxin, abscisic acid, and gibberellin. The UPLC-MS/MS method can quantify thirteen phytohormones and their metabolites simultaneously in 14 min. To validate the developed method, we determined the dynamic profiles of phytohormones and gene expressions in small axillary shoot buds in garden pea. This new method is applicable to quantification analysis of gene expression and multiple phytohormone classes in small amounts of plant materials. The results obtained using this method in axillary buds provide a basis for understanding the phytohormone functions in shoot branching regulation.
  English, Scientific journal
  DOI：https://doi.org/10.3389/fpls.2020.605069
  DOI ID：10.3389/fpls.2020.605069, PubMed ID：33329677, PubMed Central ID：PMC7717934
• Do Phosphate and Cytokinin Interact to Regulate Strigolactone Biosynthesis or Act Independently?　　　　　　　　　　　　　　　
  Kaori Yoneyama; Xiaonan Xie; Takahito Nomura; Koichi Yoneyama
  Frontiers in plant science, Volume：11, First page：438, Last page：438, 2020, ［International magazine］
  Strigolactones (SLs) are essential host recognition signals for both root-parasitic plants and arbuscular mycorrhizal (AM) fungi in the rhizosphere, and in planta SLs or their metabolites function as a novel class of plant hormones that regulate various aspects of plant growth through crosstalk with other hormones. Although nutrient availability is one of the important factors influencing SL production and exudation, and phosphate (Pi) deficiency significantly promotes SL production and exudation in host plants of AM fungi, how nutrient availability modulates SL production and exudation remains elusive. Cytokinin (CK), a canonical plant hormone, has extensively been studied as a shoot branching promoter and its biosynthesis is also influenced by mineral nutrients, especially nitrate, indicating that CK might be another key factor that affect SL production and exudation. In the present study, we show that CKs (t-zeatin, benzyladenine, kinetin, and CPPU) applied to hydroponic culture media significantly suppressed the SL levels in both the root exudates and the root tissues of rice plants grown under Pi deficiency. In a split-root system, CK suppressed SL production locally, while Pi affected SL production systemically, suggesting that Pi and CK act on SL production independently in rice plants.
  English, Scientific journal
  DOI：https://doi.org/10.3389/fpls.2020.00438
  DOI ID：10.3389/fpls.2020.00438, PubMed ID：32508849, PubMed Central ID：PMC7251057
• Regulation of biosynthesis, perception, and functions of strigolactones for promoting arbuscular mycorrhizal symbiosis and managing root parasitic weeds.　　　　　　　　　　　　　　　
  Koichi Yoneyama; Xiaonan Xie; Kaori Yoneyama; Takahito Nomura; Ikuo Takahashi; Tadao Asami; Narumi Mori; Kohki Akiyama; Miyuki Kusajima; Hideo Nakashita
  Pest management science, Volume：75, Number：9, First page：2353, Last page：2359, Sep. 2019, [Reviewed], ［International magazine］
  Strigolactones (SLs) are carotenoid-derived plant secondary metabolites that play important roles in various aspects of plant growth and development as plant hormones, and in rhizosphere communications with symbiotic microbes and also root parasitic weeds. Therefore, sophisticated regulation of the biosynthesis, perception and functions of SLs is expected to promote symbiosis of beneficial microbes including arbuscular mycorrhizal (AM) fungi and also to retard parasitism by devastating root parasitic weeds. We have developed SL mimics with different skeletons, SL biosynthesis inhibitors acting at different biosynthetic steps, SL perception inhibitors that covalently bind to the SL receptor D14, and SL function inhibitors that bind to the serine residue at the catalytic site. In greenhouse pot tests, TIS108, an azole-type SL biosynthesis inhibitor effectively reduced numbers of attached root parasites Orobanche minor and Striga hermonthica without affecting their host plants; tomato and rice, respectively. AM colonization resulted in weak but distinctly enhanced plant resistance to pathogens. SL mimics can be used to promote AM symbiosis and to reduce the application rate of systemic-acquired resistance inducers which are generally phytotoxic to horticultural crops. © 2019 Society of Chemical Industry.
  Wiley, English, Scientific journal
  DOI：https://doi.org/10.1002/ps.5401
  DOI ID：10.1002/ps.5401, ORCID：54984511, PubMed ID：30843315
• How Do Strigolactones Ameliorate Nutrient Deficiencies in Plants?　　　　　　　　　　　　　　　
  Kaori Yoneyama
  Cold Spring Harbor perspectives in biology, Volume：11, Number：8, Aug. 2019, [Reviewed], ［International magazine］
  Strigolactones (SLs), a group of plant secondary metabolites, play an important role as a host recognition signal for symbiotic arbuscular mycorrhizal (AM) fungi in the rhizosphere. SLs promote symbioses with other beneficial microbes, including root nodule bacteria. Root parasitic weeds also take advantage of SLs as a clue to locate living host roots. In plants, SLs function as plant hormones regulating various growth and developmental processes including shoot and root architectures. Plants under nutrient deficiencies, especially that of phosphate, promote SL production and exudation to attract symbionts and to optimize shoot and root architecture.
  English, Scientific journal
  DOI：https://doi.org/10.1101/cshperspect.a034686
  DOI ID：10.1101/cshperspect.a034686, PubMed ID：31088825
• Corrigendum to: Which are the major players, canonical or non-canonical strigolactones?　　　　　　　　　　　　　　　
  Koichi Yoneyama; Xiaonan Xie; Kaori Yoneyama; Takaya Kisugi; Takahito Nomura; Yoshifumi Nakatani; Kohki Akiyama; Christopher S P McErlean
  Journal of experimental botany, Volume：70, Number：6, First page：1987, Last page：1987, Mar. 2019, [Reviewed], ［International magazine］
  English, Scientific journal
  DOI：https://doi.org/10.1093/jxb/erz001
  DOI ID：10.1093/jxb/erz001, PubMed ID：30893432
• Lotuslactone, a non-canonical strigolactone from Lotus japonicus.　　　　　　　　　　　　　　　
  Xiaonan Xie; Narumi Mori; Kaori Yoneyama; Takahito Nomura; Kenichi Uchida; Koichi Yoneyama; Kohki Akiyama
  Phytochemistry, Volume：157, First page：200, Last page：205, Jan. 2019, [Reviewed], ［International magazine］
  Root exudates from Lotus japonicus were found to contain at least three different hyphal branching-inducing compounds for the arbuscular mycorrhizal (AM) fungus Gigaspora margarita, one of which had been previously identified as (+)-5-deoxystrigol (5DS), a canonical strigolactone (SL). One of the two remaining unknown hyphal branching inducers was purified and named lotuslactone. Its structure was determined as methyl (E)-2-(3-acetoxy-2-hydroxy-7-methyl-1-oxo-1,2,3,4,5,6-hexahydroazulen-2-yl)-3-(((R)-4-methyl-5-oxo-2,5-dihydrofuran-2-yl)oxy)acrylate, by 1D and 2D NMR spectroscopy, and HR-ESI- and EI-MS. Although lotuslactone, a non-canonical SL, contains the AB-ring and the enol ether-bridged D-ring, it lacks the C-ring and has a seven-membered cycloheptadiene in the A-ring part as in medicaol, a major SL of Medicago truncatula. Lotuslactone was much less active than 5DS, but showed comparable activity to methyl carlactonoate (MeCLA) in inducing hyphal branching of G. margarita. Other natural non-canonical SLs including avenaol, heliolactone, and zealactone (methyl zealactonoate) were also found to be moderate to weak inducers of hyphal branching in the AM fungus. Lotuslactone strongly elicited seed germination in Phelipanche ramosa and Orobanche minor, but Striga hermonthica seeds were 100-fold less sensitive to this stimulant.
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.phytochem.2018.10.034
  DOI ID：10.1016/j.phytochem.2018.10.034, ISSN：0031-9422, PubMed ID：30439621
• Low Infection of Phelipanche aegyptiaca in Micro-Tom Mutants Deficient in CAROTENOIDCLEAVAGE DIOXYGENASE 8.　　　　　　　　　　　　　　　
  Shoko Hasegawa; Takuya Tsutsumi; Shunsuke Fukushima; Yoshihiro Okabe; Junna Saito; Mina Katayama; Masato Shindo; Yusuke Yamada; Koichiro Shimomura; Kaori Yoneyama; Kohki Akiyama; Koh Aoki; Tohru Ariizumi; Hiroshi Ezura; Shinjiro Yamaguchi; Mikihisa Umehara
  International journal of molecular sciences, Volume：19, Number：9, Sep. 2018, [Reviewed], ［International magazine］
  Strigolactones (SLs), a group of plant hormones, induce germination of root-parasitic plants and inhibit shoot branching in many plants. Shoot branching is an important trait that affects the number and quality of flowers and fruits. Root-parasitic plants, such as Phelipanche spp., infect tomato roots and cause economic damage in Europe and North Africa-hence why resistant tomato cultivars are needed. In this study, we found carotenoid cleavage dioxygenase 8-defective mutants of Micro-Tom tomato (slccd8) by the "targeting induced local lesions in genomes" (TILLING) method. The mutants showed excess branching, which was suppressed by exogenously applied SL. Grafting shoot scions of the slccd8 mutants onto wild-type (WT) rootstocks restored normal branching in the scions. The levels of endogenous orobanchol and solanacol in WT were enough detectable, whereas that in the slccd8 mutants were below the detection limit of quantification analysis. Accordingly, root exudates of the slccd8 mutants hardly stimulated seed germination of root parasitic plants. In addition, SL deficiency did not critically affect the fruit traits of Micro-Tom. Using a rhizotron system, we also found that Phelipanche aegyptiaca infection was lower in the slccd8 mutants than in wild-type Micro-Tom because of the low germination. We propose that the slccd8 mutants might be useful as new tomato lines resistant to P. aegyptiaca.
  English, Scientific journal
  DOI：https://doi.org/10.3390/ijms19092645
  DOI ID：10.3390/ijms19092645, PubMed ID：30200620, PubMed Central ID：PMC6163878
• Conversion of carlactone to carlactonoic acid is a conserved function of MAX1 homologs in strigolactone biosynthesis　　　　　　　　　　　　　　　
  Kaori Yoneyama; Narumi Mori; Tomoyasu Sato; Akiyoshi Yoda; Xiaonan Xie; Masanori Okamoto; Masashi Iwanaga; Toshiyuki Ohnishi; Hisashi Nishiwaki; Tadao Asami; Takao Yokota; Kohki Akiyama; Koichi Yoneyama; Takahito Nomura
  New Phytologist, Volume：218, Number：4, First page：1522, Last page：1533, Jun. 2018, [Reviewed]
  Scientific journal
  DOI：https://doi.org/10.1111/nph.15055
  Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85042441956&origin=inward
  Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85042441956&origin=inward
  DOI ID：10.1111/nph.15055, ISSN：0028-646X, eISSN：1469-8137, PubMed ID：29479714, SCOPUS ID：85042441956
• Which are the major players, canonical or non-canonical strigolactones?　　　　　　　　　　　　　　　
  Koichi Yoneyama; Xiaonan Xie; Kaori Yoneyama; Takaya Kisugi; Takahito Nomura; Yoshifumi Nakatani; Kohki Akiyama; Christopher S.P. McErlean
  Journal of Experimental Botany, Volume：69, Number：9, First page：2231, Last page：2239, Apr. 2018, [Reviewed]
  DOI：https://doi.org/10.1093/jxb/ery090
  Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85049778485&origin=inward
  Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85049778485&origin=inward
  DOI ID：10.1093/jxb/ery090, ISSN：0022-0957, eISSN：1460-2431, PubMed ID：29522151, SCOPUS ID：85049778485
• Methyl zealactonoate, a novel germination stimulant for root parasitic weeds produced by maize　　　　　　　　　　　　　　　
  Xiaonan Xie; Takaya Kisugi; Kaori Yoneyama; Takahito Nomura; Kohki Akiyama; Kenichi Uchida; Takao Yokota; Christopher S. P. McErlean; Koichi Yoneyama
  JOURNAL OF PESTICIDE SCIENCE, Volume：42, Number：1-2, First page：58, Last page：61, 2017, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1584/jpestics.D16-103
  DOI ID：10.1584/jpestics.D16-103, ISSN：1348-589X, eISSN：1349-0923, Web of Science ID：WOS:000404321100009
• LATERAL BRANCHING OXIDOREDUCTASE acts in the final stages of strigolactone biosynthesis in Arabidopsis　　　　　　　　　　　　　　　
  Philip B. Brewer; Kaori Yoneyama; Fiona Filardo; Emma Meyers; Adrian Scaffidi; Tancred Frickey; Kohki Akiyama; Yoshiya Seto; Elizabeth A. Dun; Julia E. Cremer; Stephanie C. Kerr; Mark T. Waters; Gavin R. Flematti; Michael G. Mason; Georg Weiller; Shinjiro Yamaguchi; Takahito Nomura; Steven M. Smith; Koichi Yoneyama; Christine A. Beveridge
  PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, Volume：113, Number：22, First page：6301, Last page：6306, May 2016, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1073/pnas.1601729113
  DOI ID：10.1073/pnas.1601729113, ISSN：0027-8424, PubMed ID：27194725, Web of Science ID：WOS:000376784600060
• Structure- and stereospecific transport of strigolactones from roots to shoots　　　　　　　　　　　　　　　
  Xiaonan Xie; Kaori Yoneyama; Takaya Kisugi; Takahito Nomura; Kohki Akiyama; Tadao Asami; Koichi Yoneyama
  JOURNAL OF PESTICIDE SCIENCE, Volume：41, Number：2, First page：55, Last page：58, 2016, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1584/jpestics.D16-009
  DOI ID：10.1584/jpestics.D16-009, ISSN：1348-589X, eISSN：1349-0923, Web of Science ID：WOS:000378823400005
• Difference in Striga-susceptibility is reflected in strigolactone secretion profile, but not in compatibility and host preference in arbuscular mycorrhizal symbiosis in two maize cultivars　　　　　　　　　　　　　　　
  Kaori Yoneyama; Ryota Arakawa; Keiko Ishimoto; Hyun Il Kim; Takaya Kisugi; Xiaonan Xie; Takahito Nomura; Fred Kanampiu; Takao Yokota; Tatsuhiro Ezawa; Koichi Yoneyama
  NEW PHYTOLOGIST, Volume：206, Number：3, First page：983, Last page：989, May 2015, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1111/nph.13375
  DOI ID：10.1111/nph.13375, ISSN：0028-646X, eISSN：1469-8137, PubMed ID：25754513, Web of Science ID：WOS:000352802800012
• Shoot-derived signals other than auxin are involved in systemic regulation of strigolactone production in roots　　　　　　　　　　　　　　　
  Kaori Yoneyama; Takaya Kisugi; Xiaonan Xie; Ryota Arakawa; Tatsuhiro Ezawa; Takahito Nomura; Koichi Yoneyama
  PLANTA, Volume：241, Number：3, First page：687, Last page：698, Mar. 2015, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1007/s00425-014-2208-x
  DOI ID：10.1007/s00425-014-2208-x, ISSN：0032-0935, eISSN：1432-2048, PubMed ID：25417194, Web of Science ID：WOS:000349958600012
• Carlactone is converted to carlactonoic acid by MAX1 in Arabidopsis and its methyl ester can directly interact with AtD14 in vitro　　　　　　　　　　　　　　　
  Satoko Abe; Aika Sado; Kai Tanaka; Takaya Kisugi; Kei Asami; Saeko Ota; Hyun Il Kim; Kaori Yoneyama; Xiaonan Xie; Toshiyuki Ohnishi; Yoshiya Seto; Shinjiro Yamaguchi; Kohki Akiyama; Koichi Yoneyama; Takahito Nomura
  PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, Volume：111, Number：50, First page：18084, Last page：18089, Dec. 2014, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1073/pnas.1410801111
  DOI ID：10.1073/pnas.1410801111, ISSN：0027-8424, PubMed ID：25425668, Web of Science ID：WOS:000346366500087
• Avenaol, a germination stimulant for root parasitic plants from Avena strigosa　　　　　　　　　　　　　　　
  Hyun Ii Kim; Takaya Kisugi; Pichit Khetkam; Xiaonan Xie; Kaori Yoneyama; Kenichi Uchida; Takao Yokota; Takahito Nomura; Christopher S. P. McErlean; Koichi Yoneyama
  PHYTOCHEMISTRY, Volume：103, First page：85, Last page：88, Jul. 2014, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.phytochem.2014.03.030
  DOI ID：10.1016/j.phytochem.2014.03.030, ISSN：0031-9422, PubMed ID：24768285, Web of Science ID：WOS:000337777800010
• Nitrogen and phosphorus fertilization negatively affects strigolactone production and exudation in sorghum　　　　　　　　　　　　　　　
  Kaori Yoneyama; Xiaonan Xie; Takaya Kisugi; Takahito Nomura; Koichi Yoneyama
  PLANTA, Volume：238, Number：5, First page：885, Last page：894, Nov. 2013, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1007/s00425-013-1943-8
  DOI ID：10.1007/s00425-013-1943-8, ISSN：0032-0935, eISSN：1432-2048, PubMed ID：23925853, Web of Science ID：WOS:000326073800007
• Relationship between gene responses and symptoms induced by Rice grassy stunt virus　　　　　　　　　　　　　　　
  Kouji Satoh; Kaori Yoneyama; Hiroaki Kondoh; Takumi Shimizu; Takahide Sasaya; Il-Ryong Choi; Koichi Yoneyama; Toshihiro Omura; Shoshi Kikuchi
  FRONTIERS IN MICROBIOLOGY, Volume：4, First page：313, Oct. 2013, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.3389/fmicb.2013.00313
  DOI ID：10.3389/fmicb.2013.00313, ISSN：1664-302X, PubMed ID：24151491, Web of Science ID：WOS:000331529300001
• Chemistry of Strigolactones: Why and How do Plants Produce so Many Strigolactones?　　　　　　　　　　　　　　　
  Koichi Yoneyama; Takaya Kisugi; Xiaonan Xie; Kaori Yoneyama
  Molecular Microbial Ecology of the Rhizosphere, Volume：1, First page：373, Last page：379, Mar. 2013, [Reviewed]
  John Wiley and Sons, English, In book
  DOI：https://doi.org/10.1002/9781118297674.ch34
  DOI ID：10.1002/9781118297674.ch34, SCOPUS ID：84886561603
• Strigone, isolation and identification as a natural strigolactone from Houttuynia cordata　　　　　　　　　　　　　　　
  Takaya Kisugi; Xiaonan Xie; Hyun Il Kim; Kaori Yoneyama; Aika Sado; Kohki Akiyama; Hideo Hayashi; Kenichi Uchida; Takao Yokota; Takahito Nomura; Koichi Yoneyama
  PHYTOCHEMISTRY, Volume：87, First page：60, Last page：64, Mar. 2013, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.phytochem.2012.11.013
  DOI ID：10.1016/j.phytochem.2012.11.013, ISSN：0031-9422, PubMed ID：23290861, Web of Science ID：WOS:000315078900007
• Strigolactones: Internal and external signals in plant symbioses?　　　　　　　　　　　　　　　
  Eloise Foo; Kaori Yoneyama; Cassandra Hugill; Laura J. Quittenden; James B. Reid
  Plant Signaling and Behavior, Volume：8, Number：3, First page：e23168.4, Mar. 2013, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.4161/psb.23168
  DOI ID：10.4161/psb.23168, ISSN：1559-2316, PubMed ID：23299321, SCOPUS ID：84874695796
• Strigolactones and biological activity　　　　　　　　　　　　　　　
  Koichi Yoneyama; Xiaonan Xie; Kaori Yoneyama
  Natural Products: Phytochemistry, Botany and Metabolism of Alkaloids, Phenolics and Terpenes, First page：3583, Last page：3604, Jan. 2013, [Reviewed]
  Springer Berlin Heidelberg, English, In book
  DOI：https://doi.org/10.1007/978-3-642-22144-6_155
  DOI ID：10.1007/978-3-642-22144-6_155, SCOPUS ID：84924360213
• Strigolactones and the Regulation of Pea Symbioses in Response to Nitrate and Phosphate Deficiency　　　　　　　　　　　　　　　
  Eloise Foo; Kaori Yoneyama; Cassandra J. Hugill; Laura J. Quittenden; James B. Reid
  MOLECULAR PLANT, Volume：6, Number：1, First page：76, Last page：87, Jan. 2013, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1093/mp/sss115
  DOI ID：10.1093/mp/sss115, ISSN：1674-2052, eISSN：1752-9867, PubMed ID：23066094, Web of Science ID：WOS:000314117100011
• Confirming Stereochemical Structures of Strigolactones Produced by Rice and Tobacco　　　　　　　　　　　　　　　
  Xiaonan Xie; Kaori Yoneyama; Takaya Kisugi; Kenichi Uchida; Seisuke Ito; Kohki Akiyama; Hideo Hayashi; Takao Yokota; Takahito Nomura; Koichi Yoneyama
  MOLECULAR PLANT, Volume：6, Number：1, First page：153, Last page：163, Jan. 2013, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1093/mp/sss139
  DOI ID：10.1093/mp/sss139, ISSN：1674-2052, PubMed ID：23204500, Web of Science ID：WOS:000314117100017
• Germination Stimulants of Phelipanche ramosa in the Rhizosphere of Brassica napus Are Derived from the Glucosinolate Pathway　　　　　　　　　　　　　　　
  Bathilde Auger; Jean-Bernard Pouvreau; Karinne Pouponneau; Kaori Yoneyama; Gregory Montiel; Bruno Le Bizec; Koichi Yoneyama; Philippe Delavault; Regine Delourme; Philippe Simier
  MOLECULAR PLANT-MICROBE INTERACTIONS, Volume：25, Number：7, First page：993, Last page：1004, Jul. 2012, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1094/MPMI-01-12-0006-R
  DOI ID：10.1094/MPMI-01-12-0006-R, ISSN：0894-0282, eISSN：1943-7706, PubMed ID：22414435, Web of Science ID：WOS:000305503700014
• How do nitrogen and phosphorus deficiencies affect strigolactone production and exudation?　　　　　　　　　　　　　　　
  Kaori Yoneyama; Xiaonan Xie; Hyun Il Kim; Takaya Kisugi; Takahito Nomura; Hitoshi Sekimoto; Takao Yokota; Koichi Yoneyama
  PLANTA, Volume：235, Number：6, First page：1197, Last page：1207, Jun. 2012, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1007/s00425-011-1568-8
  DOI ID：10.1007/s00425-011-1568-8, ISSN：0032-0935, eISSN：1432-2048, PubMed ID：22183123, Web of Science ID：WOS:000304621200008
• Characterization of strigolactones exuded by Asteraceae plants　　　　　　　　　　　　　　　
  Kaori Yoneyama; Xiaonan Xie; Takaya Kisugi; Takahito Nomura; Hitoshi Sekimoto; Takao Yokota; Koichi Yoneyama
  PLANT GROWTH REGULATION, Volume：65, Number：3, First page：495, Last page：504, Dec. 2011, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1007/s10725-011-9620-z
  DOI ID：10.1007/s10725-011-9620-z, ISSN：0167-6903, eISSN：1573-5087, Web of Science ID：WOS:000297621200007
• Strigolactones regulate protonema branching and act as a quorum sensing-like signal in the moss Physcomitrella patens　　　　　　　　　　　　　　　
  Helene Proust; Beate Hoffmann; Xiaonan Xie; Kaori Yoneyama; Didier G. Schaefer; Koichi Yoneyama; Fabien Nogue; Catherine Rameau
  DEVELOPMENT, Volume：138, Number：8, First page：1531, Last page：1539, Apr. 2011, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1242/dev.058495
  DOI ID：10.1242/dev.058495, ISSN：0950-1991, PubMed ID：21367820, Web of Science ID：WOS:000288649400009
• Strigolactone Deficiency Confers Resistance in Tomato Line SL-ORT1 to the Parasitic Weeds Phelipanche and Orobanche spp.　　　　　　　　　　　　　　　
  Evgenia Dor; Koichi Yoneyama; Smadar Wininger; Yoram Kapulnik; Kaori Yoneyama; Hinanit Koltai; Xiaonan Xie; Joseph Hershenhorn
  PHYTOPATHOLOGY, Volume：101, Number：2, First page：213, Last page：222, Feb. 2011, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1094/PHYTO-07-10-0184
  DOI ID：10.1094/PHYTO-07-10-0184, ISSN：0031-949X, PubMed ID：20942651, Web of Science ID：WOS:000286644800005
• Strigolactones as Germination Stimulants for Root Parasitic Plants　　　　　　　　　　　　　　　
  Koichi Yoneyama; Ayman A. Awad; Xiaonan Xie; Kaori Yoneyama; Yasutomo Takeuchi
  PLANT AND CELL PHYSIOLOGY, Volume：51, Number：7, First page：1095, Last page：1103, Jul. 2010, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1093/pcp/pcq055
  DOI ID：10.1093/pcp/pcq055, ISSN：0032-0781, PubMed ID：20403809, Web of Science ID：WOS:000280318500002
• A tomato strigolactone-impaired mutant displays aberrant shoot morphology and plant interactions　　　　　　　　　　　　　　　
  Hinanit Koltai; Sivarama P. LekKala; Chaitali Bhattacharya; Einav Mayzlish-Gati; Nathalie Resnick; Smadar Wininger; Evgenya Dor; Kaori Yoneyama; Koichi Yoneyama; Joseph Hershenhorn; Daniel M. Joel; Yoram Kapulnik
  JOURNAL OF EXPERIMENTAL BOTANY, Volume：61, Number：6, First page：1739, Last page：1749, Apr. 2010, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1093/jxb/erq041
  DOI ID：10.1093/jxb/erq041, ISSN：0022-0957, PubMed ID：20194924, Web of Science ID：WOS:000276735300015
• The Strigolactone Story　　　　　　　　　　　　　　　
  Xiaonan Xie; Kaori Yoneyama; Koichi Yoneyama
  ANNUAL REVIEW OF PHYTOPATHOLOGY, VOL 48, Volume：48, First page：93, Last page：117, 2010, [Reviewed]
  English, In book
  DOI：https://doi.org/10.1146/annurev-phyto-073009-114453
  DOI ID：10.1146/annurev-phyto-073009-114453, ISSN：0066-4286, PubMed ID：20687831, Web of Science ID：WOS:000282062400005
• 7-Oxoorobanchyl Acetate and 7-Oxoorobanchol as Germination Stimulants for Root Parasitic Plants from Flax (Linum usitatissimum)　　　　　　　　　　　　　　　
  Xiaonan Xie; Kaori Yoneyama; Jun-ya Kurita; Yuta Harada; Yoichi Yamada; Yasutomo Takeuchi; Koichi Yoneyama
  BIOSCIENCE BIOTECHNOLOGY AND BIOCHEMISTRY, Volume：73, Number：6, First page：1367, Last page：1370, Jun. 2009, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1271/bbb.90021
  DOI ID：10.1271/bbb.90021, ISSN：0916-8451, eISSN：1347-6947, PubMed ID：19502732, Web of Science ID：WOS:000267872100021
• Strigolactones: structures and biological activities　　　　　　　　　　　　　　　
  Koichi Yoneyama; Xiaonan Xie; Kaori Yoneyama; Yasutomo Takeuchi
  PEST MANAGEMENT SCIENCE, Volume：65, Number：5, First page：467, Last page：470, May 2009, [Reviewed]
  English
  DOI：https://doi.org/10.1002/ps.1726
  DOI ID：10.1002/ps.1726, ISSN：1526-498X, PubMed ID：19222028, Web of Science ID：WOS:000265726800004
• Fabacyl acetate, a germination stimulant for root parasitic plants from Pisum sativum　　　　　　　　　　　　　　　
  Xiaonan Xie; Kaori Yoneyama; Yuta Harada; Norio Fusegi; Yoichi Yamada; Satoshi Ito; Takao Yokota; Yasutomo Takeuchi; Koichi Yoneyama
  PHYTOCHEMISTRY, Volume：70, Number：2, First page：211, Last page：215, Jan. 2009, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.phytochem.2008.12.013
  DOI ID：10.1016/j.phytochem.2008.12.013, ISSN：0031-9422, PubMed ID：19155028, Web of Science ID：WOS:000264584000007
• Sorgomol, germination stimulant for root parasitic plants, produced by Sorghum bicolor　　　　　　　　　　　　　　　
  Xiaonan Xie; Kaori Yoneyama; Dai Kusumoto; Yoichi Yamada; Yasutomo Takeuchi; Yukihiro Sugimoto; Koichi Yoneyama
  Tetrahedron Letters, Volume：49, Number：13, First page：2066, Last page：2068, Mar. 2008, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.tetlet.2008.01.131
  DOI ID：10.1016/j.tetlet.2008.01.131, ISSN：0040-4039, SCOPUS ID：39649111519, Web of Science ID：WOS:000254446000006
• Isolation and identification of alectrol as (+)-orobanchyl acetate, a germination stimulant for root parasitic plants　　　　　　　　　　　　　　　
  Xiaonan Xie; Kaori Yoneyama; Dai Kusumoto; Yolchi Yamada; Takao Yokota; Yasutomo Takeuchi; Koichi Yoneyama
  PHYTOCHEMISTRY, Volume：69, Number：2, First page：427, Last page：431, Jan. 2008, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.phytochem.2007.07.017
  DOI ID：10.1016/j.phytochem.2007.07.017, ISSN：0031-9422, PubMed ID：17822727, Web of Science ID：WOS:000253267300015
• Strigolactones, host recognition signals for root parasitic plants and arbuscular mycorrhizal fungi, from Fabaceae plants　　　　　　　　　　　　　　　
  Kaori Yoneyama; Xiaonan Xie; Hitoshi Sekimoto; Yasutomo Takeuchi; Shin Ogasawara; Kohki Akiyama; Hideo Hayashi; Koichi Yoneyama
  NEW PHYTOLOGIST, Volume：179, Number：2, First page：484, Last page：494, 2008, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1111/j.1469-8137.2008.02462.x
  DOI ID：10.1111/j.1469-8137.2008.02462.x, ISSN：0028-646X, PubMed ID：19086293, Web of Science ID：WOS:000257570400021
• Nitrogen deficiency as well as phosphorus deficiency in sorghum promotes the production and exudation of 5-deoxystrigol, the host recognition signal for arbuscular mycorrhizal fungi and root parasites　　　　　　　　　　　　　　　
  Kaori Yoneyama; Xiaonan Xie; Dai Kusumoto; Hitoshi Sekimoto; Yukihiro Sugimoto; Yasutomo Takeuchi; Koichi Yoneyama
  PLANTA, Volume：227, Number：1, First page：125, Last page：132, Dec. 2007, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1007/s00425-007-0600-5
  DOI ID：10.1007/s00425-007-0600-5, ISSN：0032-0935, PubMed ID：17684758, Web of Science ID：WOS:000251370300012
• 2 '-Epi-orobanchol and solanacol, two unique strigolactones, germination stimulants for root parasitic weeds, produced by tobacco　　　　　　　　　　　　　　　
  Xiaonan Xie; Dai Kusumoto; Yasutomo Takeuchi; Kaori Yoneyama; Yoichi Yamada; Koichi Yoneyama
  JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, Volume：55, Number：20, First page：8067, Last page：8072, Oct. 2007, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1021/jf0715121
  DOI ID：10.1021/jf0715121, ISSN：0021-8561, PubMed ID：17803261, Web of Science ID：WOS:000249871100012
• Resistance of red clover (Trifolium pratense) to the root parasitic plant Orobanche minor is activated by salicylate but not by jasmonate　　　　　　　　　　　　　　　
  Dai Kusumoto; Yaakov Goldwasser; Xiaonan Xie; Kaori Yoneyama; Yasutomo Takeuchi; Koichi Yoneyama
  ANNALS OF BOTANY, Volume：100, Number：3, First page：537, Last page：544, Sep. 2007, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1093/aob/mcm148
  DOI ID：10.1093/aob/mcm148, ISSN：0305-7364, PubMed ID：17660517, Web of Science ID：WOS:000249654600010
• Phosphorus deficiency in red clover promotes exudation of orobanchol, the signal for mycorrhizal symbionts and germination stimulant for root parasites　　　　　　　　　　　　　　　
  Kaori Yoneyama; Koichi Yoneyama; Yasutomo Takeuchi; Hitoshi Sekimoto
  PLANTA, Volume：225, Number：4, First page：1031, Last page：1038, Mar. 2007, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1007/s00425-006-0410-1
  DOI ID：10.1007/s00425-006-0410-1, ISSN：0032-0935, PubMed ID：17260144, Web of Science ID：WOS:000244303900020
• Effects of fluridone and norflurazon on conditioning and germination of Striga asiatica seeds
  Dai Kusumoto; Sang Heon Chae; Ken Mukaida; Kaori Yoneyama; Koichi Yoneyama; Daniel M. Joel; Yasutomo Takeuchi
  Plant Growth Regulation, Volume：48, Number：1, First page：73, Last page：78, Jan. 2006, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1007/s10725-005-4746-5
  DOI ID：10.1007/s10725-005-4746-5, ISSN：0167-6903, SCOPUS ID：30644467118

• 植物-植物間コミュニケーションを利用した作物の耐性強化を目指して　　　　　　　　　　　　　　　
  米山香織
  Volume：58, Number：10, 2025
  ISSN：0289-8233, J-Global ID：202502277505470930
• An Ancestral Strigolactone Conserved in Land Plants　　　　　　　　　　　　　　　
  YODA Akiyoshi; YODA Akiyoshi; XIE Xiaonan; SHIMAZAKI Shota; KODAMA Kyoichi; YONEYAMA Kaori; AKIYAMA Kohki; SHIMAMURA Masaki; KYOZUKA Junko; NOMURA Takahito
  日本植物生理学会年会(Web), Volume：62nd, 2021
  J-Global ID：202102273274181273
• Strigolactone Biosynthesis in Bryophytes　　　　　　　　　　　　　　　
  依田彬義; 依田彬義; XIE Xiaonan; 島崎翔太; 児玉恭一; 米山香織; 秋山康紀; 嶋村正樹; 経塚淳子; 野村崇人
  日本農芸化学会大会講演要旨集(Web), Volume：2021, 2021
  ISSN：2186-7976, J-Global ID：202102211657721084
• Functional characterization of sorghum LGS1, a target for controlling root parasitic weeds　　　　　　　　　　　　　　　
  野村崇人; 依田彬義; 森愛美; 三浦謙治; 米山香織; XIE Xiaonan; 秋山康紀; 米山弘一; 米山弘一
  日本農薬学会大会講演要旨集, Volume：45th, 2020
  ISSN：1347-8524, J-Global ID：202002281249229735
• ミヤコグサの5DSおよびlotuslactone生合成におけるMAX1下流経路の解析　　　　　　　　　　　　　　　
  森愛美; XIE Xiaonan; 米山香織; 野村崇人; 米山弘一; 秋山康紀
  Volume：2019, 2019
  ISSN：2186-7976, J-Global ID：201902218376039361
• ストリゴラクトン生合成酵素エンドウMAX1の機能解析　　　　　　　　　　　　　　　
  阿部友美; 秋山康紀; 依田彬義; 野村崇人; RAMEA Catherine; 米山香織; 米山香織
  Volume：54, Number：Supplement, 2019
  ISSN：1346-5406, J-Global ID：201902232408369605
• 立体選択的なストリゴラクトン生産に関与するソルガムLGS1酵素の機能解析　　　　　　　　　　　　　　　
  依田彬義; 森愛美; 齋藤睦美; 菊地麻祐; 神林瑛瑠; XIE Xiaonan; XIE Xiaonan; 米山香織; 秋山康紀; 米山弘一; 野村崇人; 野村崇人
  Volume：2019, 2019
  ISSN：2186-7976, J-Global ID：201902243622466315
• シダ植物のストリゴラクトン　　　　　　　　　　　　　　　
  藤倉優; 依田彬義; XIE Xiaonan; 米山香織; 秋山康紀; 経塚淳子; 米山弘一; 野村崇人
  Volume：54, Number：Supplement, 2019
  ISSN：1346-5406, J-Global ID：201902261080363353
• ストリゴラクトン生合成酵素LBOの機能解析
  米山香織; 米山香織; 秋山康紀; 高島岬; 依田彬義; XIE Xionan; 米山弘一; 野村崇人
  植物の生長調節, Volume：53, Number：Supplement, First page：20, 05 Oct. 2018
  Japanese
  ISSN：1346-5406, J-Global ID：201802278640451548
• ストリゴラクトン生合成のフィードバック制御
  米山香織; 米山香織; XIE Xionan; 米山弘一; 野村崇人
  植物の生長調節, Volume：53, Number：Supplement, First page：21, 05 Oct. 2018
  Japanese
  ISSN：1346-5406, J-Global ID：201802291810666229
• ポプラの根浸出物に含まれるストリゴラクトンの同定および構造解析　　　　　　　　　　　　　　　
  下野叡; 松下明真; 米山香織; 岡本昌憲; 野村崇人; 野村崇人; 米山弘一; XIE Xiaonan; XIE Xiaonan
  Volume：2018, 2018
  ISSN：2186-7976, J-Global ID：201802220094749975
• トマトのソラナコール生合成における芳香環形成経路　　　　　　　　　　　　　　　
  野上香奈; 米山香織; 野村崇人; 米山弘一; 秋山康紀
  Volume：2018, 2018
  ISSN：2186-7976, J-Global ID：201802262524762144
• Evolution of MAX1 enzymes in strigolactone biosynthesis　　　　　　　　　　　　　　　
  NOMURA Takahito; YONEYAMA Kaori; YONEYAMA Kaori; SATO Tomoyasu; YODA Akiyoshi; XIE Xiaonan; MORI Narumi; AKIYAMA Kohki; OKADA Kazunori; YOKOTA Takao; YONEYAMA Koichi
  日本植物生理学会年会(Web), Volume：59th, 2018
  J-Global ID：201802219073222414
• Hydroxycarlactone derivatives are potential substrates for MAX1 and LBO in strigolactone biosynthesis
  YONEYAMA Kaori; AKIYAMA Kohki; MORI Manami; XIE Xiaonan; YAMAUCHI Satoshi; NISHIWAKI Hisashi; YONEYAMA Koichi; NOMURA Takahito
  日本植物生理学会年会(Web), Volume：59th, First page：ROMBUNNO.1aG03, 2018
  English
  J-Global ID：201802251438337592
• シロイヌナズナにおける内生ストリゴラクトンの同定
  米山香織; 米山香織; 秋山康紀; 森愛美; XIE Xiaonan; 米山弘一; 野村崇人
  植物の生長調節, Volume：52, Number：Supplement, First page：45, 06 Oct. 2017
  Japanese
  ISSN：1346-5406, J-Global ID：201702273193413157
• ミヤコグサ5DS生合成におけるMAX1下流経路の解析　　　　　　　　　　　　　　　
  森愛美; 米山香織; XIE Xiaonan; 野村崇人; 米山弘一; 秋山康紀
  Volume：52, Number：Supplement, 2017
  ISSN：1346-5406, J-Global ID：201702218474729746
• ミヤコグサのストリゴラクトン生合成における新規MAX1産物の同定　　　　　　　　　　　　　　　
  森愛美; 米山香織; XIE Xiaonan; 野村崇人; 米山弘一; 秋山康紀
  Volume：2017, 2017
  ISSN：2186-7976, J-Global ID：201702220332141653
• ソラナコール型カーラクトン類のトマトMAX1およびLBOによる変換　　　　　　　　　　　　　　　
  野上香奈; 米山香織; 野村崇人; 米山弘一; 秋山康紀
  Volume：2017, 2017
  ISSN：2186-7976, J-Global ID：201702229266440653
• トマトが生産する新奇ストリゴラクトンの探索　　　　　　　　　　　　　　　
  XIE Xiaonan; 米山香織; 内田健一; 横田孝雄; 野村崇人; 米山弘一
  Volume：42nd, 2017
  ISSN：1347-8524, J-Global ID：201702233541957159
• イヌカタヒバMAX1の酵素機能　　　　　　　　　　　　　　　
  佐藤智康; 米山香織; 森愛美; XIE Xiaonan; XIE Xiaonan; 秋山康紀; 米山弘一; 米山弘一; 野村崇人; 野村崇人
  Volume：52, Number：Supplement, 2017
  ISSN：1346-5406, J-Global ID：201702253823907362
• MAX1とLBOにより導かれるストリゴラクトン生合成経路　　　　　　　　　　　　　　　
  野村崇人; 米山香織; 森愛実; XIE Xiaonan; 秋山康紀; 米山弘一
  Volume：2017, 2017
  ISSN：2186-7976, J-Global ID：201702257619487155
• ストリゴラクトン生合成におけるMAX1ホモログの機能解析　　　　　　　　　　　　　　　
  佐藤智康; 米山香織; 森愛美; 齋藤睦美; XIE Xiaonan; XIE Xiaonan; 秋山康紀; 米山弘一; 米山弘一; 野村崇人; 野村崇人
  Volume：2017, 2017
  ISSN：2186-7976, J-Global ID：201702282628919054
• シロイヌナズナにおける新奇ストリゴラクトン生合成酵素LBOの機能解析
  米山香織; BREWER Philip; 秋山康紀; 依田彬義; XIE Xiaonan; 瀬戸義哉; 山口信次郎; BEVERIDGE Christine; 米山弘一; 野村崇人
  植物の生長調節, Volume：51, Number：Supplement, First page：84, 07 Oct. 2016
  Japanese
  ISSN：1346-5406, J-Global ID：201602262247330004
• ストリゴラクトン生合成酵素MAX1の機能多様性
  米山香織; 森愛実; 秋山康紀; 佐藤智康; 齋藤睦美; XIE Xiaonan; 米山弘一; 野村崇人
  植物の生長調節, Volume：51, Number：Supplement, First page：83, 07 Oct. 2016
  Japanese
  ISSN：1346-5406, J-Global ID：201602283419267815
• Functional diversity of MAX1 enzymes in strigolactone biosynthesis
  YONEYAMA Kaori; MORI Narumi; XIE Xiaonan; KISUGI Takaya; OHNISHI Toshiyuki; LI Weiqiang; YOSHIDA Satoko; SHIRASU Ken; YAMAGUCHI Shinjiro; AKIYAMA Kohki; YONEYAMA Koichi; NOMURA Takahito
  日本植物生理学会年会要旨集, Volume：57th, First page：173, 11 Mar. 2016
  English
  J-Global ID：201602268026867923
• イネのストリゴラクトン生産におけるリンとサイトカイニンの影響
  米山香織; 米山弘一; 野村崇人
  日本農芸化学会大会講演要旨集(Web), Volume：2016, First page：2H016 (WEB ONLY), 05 Mar. 2016
  Japanese
  ISSN：2186-7976, J-Global ID：201602283053208296
• A future plan for further advancement of the Japanese society for chemical regulation of plants　　　　　　　　　　　　　　　
  Matsubayashi Yoshikatsu; Hayashi Ken-ichiro; Okamoto Masanori; Yamaguchi Shinjiro; Yoneyama Kaori
  植物化学調節学会研究発表記録集, Volume：50, Number：0, First page：16, Last page：16, 01 Oct. 2015
  The Japanese Society for Chemical Regulation of Plants, Japanese
  ISSN：0919-1887, CiNii Articles ID：110010014914, CiNii Books ID：AN10348274
• P039 Enzymatic function of Striga MAX1　　　　　　　　　　　　　　　
  Yoneyama Kaori; Mori Narumi; Li Weiqiang; Xie Xiaonan; Seto Yoshiya; Yoshida Satoko; Shirasu Ken; Akiyama Kohki; Yamaguchi Shinjiro; Yoneyama Koichi; Nomura Takahito
  植物化学調節学会研究発表記録集, Volume：50, Number：0, First page：57, Last page：57, 01 Oct. 2015
  植物化学調節学会, Japanese
  DOI：https://doi.org/10.18978/jscrpanb.50.Supplement_57
  DOI ID：10.18978/jscrpanb.50.Supplement_57, ISSN：0919-1887, CiNii Articles ID：110010014955
• Strigolactones are transported from roots to shoots, although not through the xylem　　　　　　　　　　　　　　　
  Xiaonan Xie; Kaori Yoneyama; Takaya Kisugi; Takahito Nomura; Kohki Akiyama; Tadao Asami; Koichi Yoneyama
  JOURNAL OF PESTICIDE SCIENCE, Volume：40, Number：3-4, First page：214, Last page：216, 2015
  English
  DOI：https://doi.org/10.1584/jpestics.D15-045
  DOI ID：10.1584/jpestics.D15-045, ISSN：1348-589X, eISSN：1349-0923, CiNii Articles ID：130005111001, Web of Science ID：WOS:000367027300022
• Strigolactones are transported from roots to shoots, although not through the xylem　　　　　　　　　　　　　　　
  Xiaonan Xie; Kaori Yoneyama; Takaya Kisugi; Takahito Nomura; Kohki Akiyama; Tadao Asami; Koichi Yoneyama
  JOURNAL OF PESTICIDE SCIENCE, Volume：40, Number：3-4, First page：214, Last page：216, 2015
  English
  DOI：https://doi.org/10.1584/jpestics.D15-045
  DOI ID：10.1584/jpestics.D15-045, ISSN：1348-589X, eISSN：1349-0923, J-Global ID：201502206727808547, CiNii Articles ID：130005105050, Web of Science ID：WOS:000367027300022
• 68. Enzymatic function of MAX1 in strigolactone biosynthesis　　　　　　　　　　　　　　　
  Abe Satoko; Sado Aika; Kisugi Takaya; Kim Hyun Il; Yoneyama Kaori; Xie Xiaonan; Ohnishi Toshiyuki; Akiyama Kohki; Yoneyama Koichi; Nomura Takahito
  植物化学調節学会研究発表記録集, Volume：49, Number：0, First page：86, Last page：86, 01 Oct. 2014
  植物化学調節学会, Japanese
  DOI：https://doi.org/10.18978/jscrpanb.49.Supplement_86
  DOI ID：10.18978/jscrpanb.49.Supplement_86, ISSN：0919-1887, CiNii Articles ID：110009865157
• 72. Shoot branching regulated by nitrogen nutrient and strigolactones in Arabidopsis　　　　　　　　　　　　　　　
  Sugiura Natsuki; Yoneyama Kaori; Xie Xiaonan; Yoneyama Koichi; Nomura Takahito
  植物化学調節学会研究発表記録集, Volume：49, Number：0, First page：90, Last page：90, 01 Oct. 2014
  植物化学調節学会, Japanese
  DOI：https://doi.org/10.18978/jscrpanb.49.Supplement_90
  DOI ID：10.18978/jscrpanb.49.Supplement_90, ISSN：0919-1887, CiNii Articles ID：110009865161
• 7 alpha- and 7 beta-Hydroxyorobanchyl acetate as germination stimulants for root parasitic weeds produced by cucumber　　　　　　　　　　　　　　　
  Pichit Khetkam; Xiaonan Xie; Takaya Kisugi; Hyun Il Kim; Kaori Yoneyama; Kenichi Uchida; Takao Yokota; Takahito Nomura; Koichi Yoneyama
  JOURNAL OF PESTICIDE SCIENCE, Volume：39, Number：3-4, First page：121, Last page：126, 2014
  English
  DOI：https://doi.org/10.1584/jpestics.D14-038
  DOI ID：10.1584/jpestics.D14-038, ISSN：1348-589X, eISSN：1349-0923, J-Global ID：201402279445760044, Web of Science ID：WOS:000346892300002
• 7 alpha- and 7 beta-Hydroxyorobanchyl acetate as germination stimulants for root parasitic weeds produced by cucumber　　　　　　　　　　　　　　　
  Pichit Khetkam; Xiaonan Xie; Takaya Kisugi; Hyun Il Kim; Kaori Yoneyama; Kenichi Uchida; Takao Yokota; Takahito Nomura; Koichi Yoneyama
  JOURNAL OF PESTICIDE SCIENCE, Volume：39, Number：3-4, First page：121, Last page：126, 2014
  English
  DOI：https://doi.org/10.1584/jpestics.D14-038
  DOI ID：10.1584/jpestics.D14-038, ISSN：1348-589X, eISSN：1349-0923, CiNii Articles ID：130004445312, Web of Science ID：WOS:000346892300002
• 43. Identification of 7β-hydroxy-5-deoxystrigol from root exudates of dokudami　　　　　　　　　　　　　　　
  Kisugi Takaya; Nakatani Yoshifumi; Xie Xiaonan; Yoneyama Kaori; Akiyama Kohki; Hayashi Hideo; Uchida Kenichi; Yokota Takao; Nomura Takahito; Yoneyama Koichi
  植物化学調節学会研究発表記録集, Volume：48, Number：0, First page：58, Last page：58, 04 Oct. 2013
  植物化学調節学会, Japanese
  DOI：https://doi.org/10.18978/jscrpanb.48.Supplement_58
  DOI ID：10.18978/jscrpanb.48.Supplement_58, ISSN：0919-1887, CiNii Articles ID：110009738252
• 44. Analysis of endogenous strigolactones in Striga hermonthica　　　　　　　　　　　　　　　
  Abe Satoko; Xie Xiaonan; Kisugi Takaya; Yoneyama Kaori; Yoshida Satoko; Shirasu Ken; Yoneyama Koichi; Nomura Takahito
  植物化学調節学会研究発表記録集, Volume：48, Number：0, First page：59, Last page：59, 04 Oct. 2013
  植物化学調節学会, Japanese
  DOI：https://doi.org/10.18978/jscrpanb.48.Supplement_59
  DOI ID：10.18978/jscrpanb.48.Supplement_59, ISSN：0919-1887, CiNii Articles ID：110009738253
• 62. Sucrose restores strigolactone production in shoot removed rice plant　　　　　　　　　　　　　　　
  Yoneyama Kaori; Kisugi Takaya; Xie Xiaonan; Nomura Takahito; Yoneyama Koichi
  植物化学調節学会研究発表記録集, Volume：48, Number：0, First page：77, Last page：77, 04 Oct. 2013
  植物化学調節学会, Japanese
  DOI：https://doi.org/10.18978/jscrpanb.48.Supplement_77
  DOI ID：10.18978/jscrpanb.48.Supplement_77, ISSN：0919-1887, CiNii Articles ID：110009738271
• 63. Strigolactone biosynthesis is regulated by nitrogen in Arabidopsis　　　　　　　　　　　　　　　
  Sugiura Natsuki; Yoneyama Kaori; Kisugi Takaya; Xie Xiaonan; Yamaguchi Shinjiro; Yoneyama Koichi; Nomura Takahito
  植物化学調節学会研究発表記録集, Volume：48, Number：0, First page：78, Last page：78, 04 Oct. 2013
  植物化学調節学会, Japanese
  DOI：https://doi.org/10.18978/jscrpanb.48.Supplement_78
  DOI ID：10.18978/jscrpanb.48.Supplement_78, ISSN：0919-1887, CiNii Articles ID：110009738272
• P4-1-13 菌根菌に対する受容性が異なるトウモロコシ品種における菌根/リン応答性とストリゴラクトン分泌特性(4-1 植物の多量栄養素)　　　　　　　　　　　　　　　
  荒川 竜太; 米山 香織; 小林 創平; 米山 弘一; 江沢 辰広
  Number：59, First page：65, Last page：65, 11 Sep. 2013
  Japanese
  ISSN：0288-5840, CiNii Articles ID：110009813320, CiNii Books ID：AN00195778
• Studies on effects of plant nutrients on strigolactone production and exudation(The JSCRP Award for the Encouragement of Young Scientist,The Society Awards Lecture)　　　　　　　　　　　　　　　
  Yoneyama Kaori
  Regulation of Plant Growth & Development, Volume：48, Number：1, First page：24, Last page：32, 31 May 2013
  Availability of mineral nutrients affects strigolactone (SL) production and exudation from plants. In legumes which form symbiotic relationship with root nodule bacteria, deficiency of phosphorus (P) but not other nutrients including nitrogen (N) significantly promoted SL production and exudation. By contrast, in non-legume plants, N deficiency as well as P deficiency increased SL exudation. Such a promotion of SL exudation under nutrient deficiency could be observed, in general, with mycotrophic plants but not with non-mycotrophic plants including Arabidopsis and white lupin.
  植物化学調節学会, Japanese
  DOI：https://doi.org/10.18978/jscrp.48.1_24
  DOI ID：10.18978/jscrp.48.1_24, ISSN：1346-5406, CiNii Articles ID：110009615965, CiNii Books ID：AA11550064
• 57. Isolation and characterization of strigolactones exuded by maiz　　　　　　　　　　　　　　　
  Khetkam Pichit; Kisugi Takaya; Xie Xiaonan; Yoneyama Kaori; Nomura Takahito; Yoneyama Koichi
  Volume：47, First page：74, Last page：74, 05 Oct. 2012
  The Japanese Society for Chemical Regulation of Plants, English
  ISSN：0919-1887, CiNii Articles ID：110009517283, CiNii Books ID：AN10348274
• 56. Characterization of strigolactones exuded from Orobanche foetida tolerant and susceptible faba bean genotypes　　　　　　　　　　　　　　　
  Trabelsi Imen; Yoneyama Kaori; Abbes Zouhaier; Xie Xiaonan; Amri Moez; Kharrat Mohamed; Yoneyama Koichi
  Volume：47, First page：73, Last page：73, 05 Oct. 2012
  The Japanese Society for Chemical Regulation of Plants, English
  ISSN：0919-1887, CiNii Articles ID：110009517282, CiNii Books ID：AN10348274
• Studies on effects of plant nutrients on strigolactone production and exudation　　　　　　　　　　　　　　　
  Yoneyama Kaori
  植物化学調節学会研究発表記録集, Volume：47, Number：0, First page：17, Last page：17, 05 Oct. 2012
  植物化学調節学会, Japanese
  ISSN：0919-1887, CiNii Articles ID：110009517226, CiNii Books ID：AN10348274
• 45. Synthesis of all regio- and stereoisomers of 5-deoxystrigol derivatives substituted with a methoxy group in the AB ring　　　　　　　　　　　　　　　
  Sado Aika; Yamada Akihiro; Yoneyama Kaori; Xie Xiaonan; Yoneyama Koichi; Akiyama Kohki; Hayashi Hideo
  植物化学調節学会研究発表記録集, Volume：47, Number：0, First page：62, Last page：62, 05 Oct. 2012
  植物化学調節学会, Japanese
  ISSN：0919-1887, CiNii Articles ID：110009517271, CiNii Books ID：AN10348274
• 50. Identifi cation of germination stimulants for root parasitic plants produced by Brassica species　　　　　　　　　　　　　　　
  Kyushima Akimi; Yoneyama Kaori; Kisugi Takaya; Xie Xiaonan; Nomura Takahito; Yoneyama Koichi
  植物化学調節学会研究発表記録集, Volume：47, Number：0, First page：67, Last page：67, 05 Oct. 2012
  植物化学調節学会, Japanese
  DOI：https://doi.org/10.18978/jscrpanb.47.Supplement_67
  DOI ID：10.18978/jscrpanb.47.Supplement_67, ISSN：0919-1887, CiNii Articles ID：110009517276
• 52. Germination stimulant strigolactones exuded by oilseed rape　　　　　　　　　　　　　　　
  Arai Riho; Yoneyama Kaori; Xie Xiaonan; Kisugi Takaya; Nomura Takahito; Yoneyama Koichi
  植物化学調節学会研究発表記録集, Volume：47, Number：0, First page：69, Last page：69, 05 Oct. 2012
  植物化学調節学会, Japanese
  DOI：https://doi.org/10.18978/jscrpanb.47.Supplement_69
  DOI ID：10.18978/jscrpanb.47.Supplement_69, ISSN：0919-1887, CiNii Articles ID：110009517278
• 53. Characterization of strigolactones produced by English ivy(Hedera helix)　　　　　　　　　　　　　　　
  Kim Hyunil; Xie Xiaonan; Yoneyama Kaori; Kisugi Takaya; Nomura Takahito; Yoneyama Koichi
  植物化学調節学会研究発表記録集, Volume：47, Number：0, First page：70, Last page：70, 05 Oct. 2012
  植物化学調節学会, Japanese
  DOI：https://doi.org/10.18978/jscrpanb.47.Supplement_70
  DOI ID：10.18978/jscrpanb.47.Supplement_70, ISSN：0919-1887, CiNii Articles ID：110009517279
• 54. Structural elucidation of novel strigolactone produced by dokudami　　　　　　　　　　　　　　　
  Kisugi Takaya; Xie Xiaonan; Kim Hyun Il; Yoneyama Kaori; Sado Aika; Akiyama Kohki; Hayashi Hideo; Uchida Kenichi; Yokota Takao; Nomura Takahito; Yoneyama Koichi
  植物化学調節学会研究発表記録集, Volume：47, Number：0, First page：71, Last page：71, 05 Oct. 2012
  植物化学調節学会, Japanese
  DOI：https://doi.org/10.18978/jscrpanb.47.Supplement_71
  DOI ID：10.18978/jscrpanb.47.Supplement_71, ISSN：0919-1887, CiNii Articles ID：110009517280
• 55. Characterization of strigolactones produced by tobacco　　　　　　　　　　　　　　　
  Xie Xiaonan; Yoneyama Kaori; Kisugi Takaya; Uchida Kenichi; Ito Seisuke; Akaiyama Kohki; Hayashi Hideo; Yokota Takao; Nomura Takahito; Yoneyama Koichi
  植物化学調節学会研究発表記録集, Volume：47, Number：0, First page：72, Last page：72, 05 Oct. 2012
  植物化学調節学会, Japanese
  DOI：https://doi.org/10.18978/jscrpanb.47.Supplement_72
  DOI ID：10.18978/jscrpanb.47.Supplement_72, ISSN：0919-1887, CiNii Articles ID：110009517281
• 58. Endogenous strigolactones in cultured cells of strigolactone-defi cient mutants　　　　　　　　　　　　　　　
  Yamanaka Koichi; Xie Xiaonan; Yoneyama Kaori; Kisugi Takaya; Akiyama Koki; Yamaguchi Shinjiro; Yoneyama Koichi; Nomura Takahito
  植物化学調節学会研究発表記録集, Volume：47, Number：0, First page：75, Last page：75, 05 Oct. 2012
  植物化学調節学会, Japanese
  DOI：https://doi.org/10.18978/jscrpanb.47.Supplement_75
  DOI ID：10.18978/jscrpanb.47.Supplement_75, ISSN：0919-1887, CiNii Articles ID：110009517284
• 59. Effects of nutrient defi ciency on strigolactone exudation in pea rms mutants　　　　　　　　　　　　　　　
  Sasase Erina; Yoneyama Kaori; Ishii Yuuki; Foo Eloise; Hugill Cassandra; Quittenden Laura; Reid James B; Yoneyama Koichi
  植物化学調節学会研究発表記録集, Volume：47, Number：0, First page：76, Last page：76, 05 Oct. 2012
  植物化学調節学会, Japanese
  ISSN：0919-1887, CiNii Articles ID：110009517285, CiNii Books ID：AN10348274
• 60. Effect of nutrient defi ciency on strigolactone exudation in Orobanche foetida susceptible faba bean genotype　　　　　　　　　　　　　　　
  Ishii Yuuki; Yoneyama Kaori; Sasase Erina; Trabelsi Imen; Abbes Zouhaier; Amri Moez; Kharrat Mohamed; Yoneyama Koichi
  植物化学調節学会研究発表記録集, Volume：47, Number：0, First page：77, Last page：77, 05 Oct. 2012
  植物化学調節学会, Japanese
  ISSN：0919-1887, CiNii Articles ID：110009517286, CiNii Books ID：AN10348274
• 61. Interaction between phosphate and cytokinin in strigolactone production　　　　　　　　　　　　　　　
  Yoneyama Kaori; Xie Xiaonan; Kisugi Takaya; Nomura Takahito; Yoneyama Koichi
  植物化学調節学会研究発表記録集, Volume：47, Number：0, First page：78, Last page：78, 05 Oct. 2012
  植物化学調節学会, Japanese
  DOI：https://doi.org/10.18978/jscrpanb.47.Supplement_78
  DOI ID：10.18978/jscrpanb.47.Supplement_78, ISSN：0919-1887, CiNii Articles ID：110009517287
• アレロパシー植物セイヨウチャヒキが生産する発芽刺激物質の探索　　　　　　　　　　　　　　　
  高根沢恵子; 野村卓史; 米山香織; 来生貴也; 藤井義晴; 野村崇人; XIE Xiaonan; 米山弘一
  植物の生長調節, Volume：46, Number：Supplement, First page：64, 03 Oct. 2011
  Japanese
  ISSN：1346-5406, J-Global ID：201102245913447398
• 45. Characterization of strigolactones produced by Marchantia polymorpha L.　　　　　　　　　　　　　　　
  Xie Xiaonan; Yoneyama Kaori; Kisugi Takaya; Delaux Pierre-Marc; Becard Guillaume; Sejalon-Delmas Nathalie; Nomura Takahito; Yoneyama Koichi
  植物化学調節学会研究発表記録集, Volume：46, Number：46, First page：61, Last page：61, 03 Oct. 2011
  At the previous meeting, we reported that Physcomitrella patens subsp. patens, a bryophyte which is a basal lineage of land plants, produces strigolactones (SLs). In the present study, strigolactones produced by Marchantia polymorpha L. which is evolutionary most apart from angiosperms, were examined. Marchantia was grown on 1/2 B5 solid media for 10, 15, 20, 25, 30, 35 and 40 days, and extracted with ethyl acetate, respectively. Characterization of SLs in these extracts was conducted by comparing retention times of germination stimulants on reversed phase HPLC with those of synthetic and/or natural standards and by using LC-MS/MS. LC-MS/MS analyses confirmed the presence of SLs in Marchantia extracts, and identified solanacol, two orobanchol isomers, 2'-epiorobanchyl acetate, fabacyl acetate and 5-deoxystrigol. These results indicate that strigolactones appeared when plants first colonized land.
  植物化学調節学会, Japanese
  DOI：https://doi.org/10.18978/jscrpanb.46.0_61
  DOI ID：10.18978/jscrpanb.46.0_61, ISSN：0919-1887, CiNii Articles ID：110008902454
• 46. Characterization of strigolactones produced by faba bean (Vicia faba L.)　　　　　　　　　　　　　　　
  Kyushima Akimi; Kisugi Takaya; Xie Xiaonan; Yoneyama Kaori; Uchida Kenichi; Fernandez-Aparicio Monica; Rubiales Diego; Yokota Takao; Nomura Takahito; Yoneyama Koichi
  植物化学調節学会研究発表記録集, Volume：46, Number：46, First page：62, Last page：62, 03 Oct. 2011
  Broomrapes (Orobanche spp.) cause significant losses to agricultural production all over the world. The seeds of these parasites germinate only when they are exposed to the germination stimulants including strigolactones (SLs) produced by and released from host roots. In this study, characterization of strigolactones produced by faba bean (Vicia faba), a host of O. crenata and O. foetida was conducted. Faba bean was found to produce orobanchol and ent-2'-epiorobanchyl acetate by LC-MS/MS analysis of root exudates. Bioassay-guided purification to isolate novel germination stimulants is in progress.
  植物化学調節学会, Japanese
  DOI：https://doi.org/10.18978/jscrpanb.46.0_62
  DOI ID：10.18978/jscrpanb.46.0_62, ISSN：0919-1887, CiNii Articles ID：110008902455
• 47. Investigation of novel strigolactones produced by dokudami　　　　　　　　　　　　　　　
  Kisugi Takaya; Xie Xiaonan; Yoneyama Kaori; Uchida Kenichi; Yokota Takao; Nomura Takahito; Yoneyama Koichi
  植物化学調節学会研究発表記録集, Volume：46, Number：46, First page：63, Last page：63, 03 Oct. 2011
  Previously, we reported that dokudami (Houttuynia cordata Thunb.) produce 5 known strigolactones (SLs), strigol, sorgomol, ent-2'-epiorobanchyl acetate, fabacyl acetate and 5-deoxystrigol, and novel SLs. HR-MS analyses of novel SLs revealed that their molecular are the same to that of strigol. One of them was suggested to be a positional isomer of strigol by 'H-NMR analysis. In addition to these SLs, presence of other novel SLs was indicated by bioassay-guided fractionation.
  植物化学調節学会, Japanese
  DOI：https://doi.org/10.18978/jscrpanb.46.0_63
  DOI ID：10.18978/jscrpanb.46.0_63, ISSN：0919-1887, CiNii Articles ID：110008902456
• 48. Characterization of germination stimulants produced by Avena strigosa, an allelopathic plant　　　　　　　　　　　　　　　
  Takanezawa Keiko; Nomura Takashi; Yoneyama Kaori; Kisugi Takaya; Fujii Yoshiharu; Nomura Takahito; Xie Xiaonan; Yoneyama Koichi
  植物化学調節学会研究発表記録集, Volume：46, Number：46, First page：64, Last page：64, 03 Oct. 2011
  Among the plant-derived germination stimulants for root parasitic plants, strigolactones (SLs) have been shown to be most widely distributed in the plant kingdom. SLs are branching factors of symbiotic arbuscular mycorrhizal fungi, and a novel class of plant hormones inhibiting shoot branching. All the plants investigated so far have been found to produce SLs and the total number of natural SLs have exceeded 30 including those remained to be characterized. In this study, characterization of germination stimulants produced by black oat (Avena strigosa), an allelopathic plant, was conducted.
  植物化学調節学会, Japanese
  DOI：https://doi.org/10.18978/jscrpanb.46.0_64
  DOI ID：10.18978/jscrpanb.46.0_64, ISSN：0919-1887, CiNii Articles ID：110008902457
• 49. Germination stimulant strigolactones produced by hairy vetch　　　　　　　　　　　　　　　
  Nomura Takashi; Xie Xiaonan; Yoneyama Kaori; Kim Hyun Il; Kisugi Takaya; Nomura Takahito; Fjii Yoshiharu; Yonenama Koichi
  植物化学調節学会研究発表記録集, Volume：46, Number：46, First page：65, Last page：65, 03 Oct. 2011
  Hairy vetch (Vicia villosa Roth.), which produces large amounts of cyanamid, is widely utilized as a winter cover crop in the United States and Japan. The use of trap crops which induce 'suicidal germination' is one of the control methods for root parasitic weeds. Among germination stimulants for root parasitic weeds, dihydrosorgoleone, sesquiterpene lactones, and strigolactones (SLs), SLs are known to be most widely distributed in land plants. In this study, identification of SLs produced by hairy vetch plants was conducted. LC-MS/MS (MRM) analysis revealed that hairy vetch produces fabacyl acetate, ent-2'-epiorobanchyl acetate and 5-deoxystrigol. Time-course of strigolactone production will also be presented.
  植物化学調節学会, Japanese
  DOI：https://doi.org/10.18978/jscrpanb.46.0_65
  DOI ID：10.18978/jscrpanb.46.0_65, ISSN：0919-1887, CiNii Articles ID：110008902458
• 50. Seed germination stimulants for Phelipanche ramosa produced by oilseed rape Brassica napus　　　　　　　　　　　　　　　
  Yoneyama Kaori; Xie Xiaonan; Kim Hyun Il; Kisugi Takaya; Nomura Takahito; Auger Bathilde; Delavault Philippe; Yoneyama Koichi
  植物化学調節学会研究発表記録集, Volume：46, Number：46, First page：66, Last page：66, 03 Oct. 2011
  Phelipanche ramosa, one of devastating root parasitic weeds, causes severe damages to oilseed rape (Brassica napus) in southern France. Since oilseed rape is a non-host for AM fungi, this plant seems to produce only small amounts of strigolactones (SLs) as germination stimulants. Brassica spp. produces glucosinolates which are enzymatically converted to afford isothiocyanates (ITCs), and ITCs induce germination of P. ramosa. In the present study, identification of SLs and ITCs produced by oilseed rape plants were conducted to clarify the main germination stimulants for P. ramosa.
  植物化学調節学会, Japanese
  DOI：https://doi.org/10.18978/jscrpanb.46.0_66
  DOI ID：10.18978/jscrpanb.46.0_66, ISSN：0919-1887, CiNii Articles ID：110008902459
• 51. Structure-activity relationship of strigolactones in root parasitic weed seed germination stimulation　　　　　　　　　　　　　　　
  Kim Hyun Il; Xie Xiaonan; Yoneyama Kaori; Kisugi Takaya; Nomura Takahito; Yoneyama Koichi
  植物化学調節学会研究発表記録集, Volume：46, Number：46, First page：67, Last page：67, 03 Oct. 2011
  Strigolactones (SLs) work as germination stimulants of root parasitic plants and hyphal branching factors of symbiotic arbuscular mycorrhizal fungi. In addition to these functions of SLs in the rhizosphere, SLs or their further metabolites act as a class of plant hormones inhibiting shoot branching. In the present study, naturally occurring SLs, including those isolated recently in our laboratory, were examined for their germination stimulation on the seeds of a root parasitic plant, Orobanche minor Sm., and the structure-activity relationships of SLs in the stimulation of O. minor seed germination are discussed.
  植物化学調節学会, Japanese
  DOI：https://doi.org/10.18978/jscrpanb.46.0_67
  DOI ID：10.18978/jscrpanb.46.0_67, ISSN：0919-1887, CiNii Articles ID：110008902460
• 52. Studies on the biosynthesis pathway of strigolactones using plant cell cultures　　　　　　　　　　　　　　　
  Yamanaka Koichi; Xie Xiaonan; Yoneyama Kaori; Kisugi Takaya; Ueno Kotomi; Asami Tadao; Akiyama Koki; Yamaguchi Shinjiro; Yoneyama Koichi; Nomura Takahito
  植物化学調節学会研究発表記録集, Volume：46, Number：46, First page：68, Last page：68, 03 Oct. 2011
  Strigolactones (SLs) are host recognition signals for root parasitic plants and arbuscular mycorrhizal fungi in the rhizosphere. In addition, shoot branching is inhibited by SLs in host plants. It has been demonstrated that SLs are derived from the carotenoid pathway in plants. However, the biosynthesis pathway of SLs has not been fully elucidated by genetic approaches. In order to propose a possible biosynthesis pathway of SLs in plants we investigated SL metabolisms by a feeding experiment using plant cell cultures. We found that plant cultured cell lines of rice and Arabidopsis produce SLs at higher levels than in plants and examined an optimum condition for the SL feeding experiment. Feeding experiments were carried out using the Oc strain, a suspension cell culture of rice provided from RIKEN BioResource Center of Japan, with deuterium-labeled SLs. Deuterium-labeled 5-deoxystrigol and 2'-epi-5-deoxystrigol were converted into several monohydroxylated metabolites in rice Oc cells. These metabolites were not identical with known monohydroxylated SLs such as strigol, orobanchol and sorgomol, but some of them had a germination-stimulant activity in bioassay using Orobanche seeds.
  植物化学調節学会, Japanese
  DOI：https://doi.org/10.18978/jscrpanb.46.0_68
  DOI ID：10.18978/jscrpanb.46.0_68, ISSN：0919-1887, CiNii Articles ID：110008902461
• 34 トウモロコシにおけるストリゴラクトン類分泌プロファイルは共生・寄生生物の受容性と関係する(北海道支部講演会,2010年度各支部会講演要旨)　　　　　　　　　　　　　　　
  石本 圭子; 米山 香織; 小林 創平; 信濃 卓郎; 大崎 満; 横田 孝雄; 米山 弘一; 江沢 辰広
  Number：57, First page：297, Last page：297, 08 Aug. 2011
  Japanese
  ISSN：0288-5840, CiNii Articles ID：110009439776, CiNii Books ID：AN00195778
• Abamine as a basis for new designs of regulators of strigolactone production　　　　　　　　　　　　　　　
  Nobutaka Kitahata; Shinsaku Ito; Atsutaka Kato; Kotomi Ueno; Takeshi Nakano; Kaori Yoneyama; Koichi Yoneyama; Tadao Asami
  JOURNAL OF PESTICIDE SCIENCE, Volume：36, Number：1, First page：53, Last page：57, 2011
  English
  DOI：https://doi.org/10.1584/jpestics.G10-72
  DOI ID：10.1584/jpestics.G10-72, ISSN：1348-589X, CiNii Articles ID：120005321383, Web of Science ID：WOS:000289705500010
• Strigolactones as germination signals for root parasitic plants(Strigolactone)　　　　　　　　　　　　　　　
  Yoneyama Koichi; Xie Xiaonan; Yoneyama Kaori
  Regulation of Plant Growth & Development, Volume：45, Number：2, First page：83, Last page：94, 20 Dec. 2010
  Strigolactones (SLs) were originally isolated from plant root exudates as germination stimulants for root parasitic plants of the family Orobanchaceae, including witchweeds (Striga spp.), broomrapes (Orobanche and Phelipanche spp.), and Alectra spp., and so were regarded as detrimental to the producing plants. Most of these root parasites cause devastating damages to agricultural production in particular in developing countries, and their effective and economically feasible control measures have not yet been established. In this review, the unique host-dependent lifecycle of, discovery of SLs as germination stimulants for, and possible contribution of SLs to the host recognition of root parasitic plants are summarized.
  植物化学調節学会, Japanese
  DOI：https://doi.org/10.18978/jscrp.45.2_83
  DOI ID：10.18978/jscrp.45.2_83, ISSN：1346-5406, CiNii Articles ID：110008006476, CiNii Books ID：AA11550064
• 22. Feeding experiments of strigolactones using plant cell cultures　　　　　　　　　　　　　　　
  Nomura Takahito; Yamanaka Koichi; Xie Xiaonan; Kisugi Takaya; Yoneyama Kaori; Ueno Kotomi; Asami Tadao; Yokota Takao; Yamaguchi Shinjiro; Yoneyama Koichi
  植物化学調節学会研究発表記録集, Volume：45, Number：45, First page：39, Last page：39, 01 Oct. 2010
  Root parasitic plants and arbuscular mycorrhizal fungi receive strigolactones as host recognition signals in the rhizosphere. In host plants, strigolactones play a key role in shoot branching. Several lines of genetic evidence have illustrated that strigolantones are derived from the carotenoid pathway in plants. However, the biosynthesis pathway of strigolactones has not yet been fully elucidated. Establishment of their biosynthesis pathway and subsequent studies on regulation of their biosynthesis will provide important clues to control their physiological functions. To better understand the biosynthesis of strigolactones in plants, we investigated the occurrence of strigolactones and regulation of their biosynthesis in plant cultured cell lines provided from RIKEN BioResource Center of Japan. Feeding experiments using deuterium-labeled strigolactones in the plant cell cultures are now being conducted to unveil unestablished pathways in strigolactone biosynthesis.
  植物化学調節学会, Japanese
  DOI：https://doi.org/10.18978/jscrpanb.45.0_39
  DOI ID：10.18978/jscrpanb.45.0_39, ISSN：0919-1887, CiNii Articles ID：110007767122
• 23. Identification and structure determination of strigolactones from rice root exudate　　　　　　　　　　　　　　　
  Xie Xiaonan; Yoneyama Kaori; Uchida Kenichi; Yokoyama Mori; Kisugi Takaya; Yokota Takao; Nomura Takahito; Takeuchi Yasutomo; Yoneyama Koichi
  植物化学調節学会研究発表記録集, Volume：45, Number：45, First page：40, Last page：40, 01 Oct. 2010
  Strigolactones function as germination stimulants of root parasitic plants and hyphal branching factors of symbiotic arbuscular mycorrhizal fungi in the rhizosphere, and in plants they act as a novel class of plant hormones inhibiting shoot branching. In this study, characterization of strigolactones in rice (Oryza sativa L.) root exudate was conducted. Rice root exudate was found to contain strigolactones including orobanchol, 2'-epiorobanchol, 7-oxoorobanchyl acetate, two 5-deoxystrigol isomers and some novel strigolactones. One of the 5-deoxystrigol isomer was identified as ent-2'-epi-5-deoxystrigol by spectroscopic analyses, and purification and structure elucidation of the other novel strigolactones will be presented.
  植物化学調節学会, Japanese
  DOI：https://doi.org/10.18978/jscrpanb.45.0_40
  DOI ID：10.18978/jscrpanb.45.0_40, ISSN：0919-1887, CiNii Articles ID：110007767123
• 24. Analysis of strigolactones exuded by Striga resistant and susceptible maize cultivars　　　　　　　　　　　　　　　
  Yoneyama Kaori; Ishimoto Keiko; Xie Xiaonan; Kisugi Takaya; Asahina Masashi; Nomura Takahito; Takeuchi Yasutomo; Yoneyama Koichi; Yokota Takao
  植物化学調節学会研究発表記録集, Volume：45, Number：45, First page：41, Last page：41, 01 Oct. 2010
  Striga spp., devastating root parasitic weeds, attack monocot crops including sorghum, millet and maize in semi-arid tropics. Their seeds require germination stimulants (mainly strigolactone, SL) released from host roots to germinate. In the present study, characterization of SLs in the root exudates from maize plants including the Striga susceptible cultivar Pioneer 3253 and tolerant cultivars KST94 and WH502, grown hydroponically was conducted by comparing retention times of germination stimulants on reversed phase HPLC with those of synthetic standards and by using LC/MS/MS. The susceptible cultivar mainly exuded larger amounts of 5-deoxystrigol and the tolerant cultivars exuded mainly strigol, sorgomol and orobanchol. 5-Deoxystrigol is more stable than hydroxy-SLs like strigol and thus susceptible cultivars might induce more germination of Striga seeds in the fields.
  植物化学調節学会, Japanese
  DOI：https://doi.org/10.18978/jscrpanb.45.0_41
  DOI ID：10.18978/jscrpanb.45.0_41, ISSN：0919-1887, CiNii Articles ID：110007767124
• 25. Characterization of strigolactones produced by gametophore of Physcomitrella patens and its ccd8 mutant　　　　　　　　　　　　　　　
  Sawabe Makiko; Xie Xiaonan; Yoneyama Kaori; Proust Helene; Hoffmann Beate; Rameau Catherine; Takeuchi Yasutomo; Yoneyama Koichi
  植物化学調節学会研究発表記録集, Number：45, First page：42, Last page：42, 01 Oct. 2010
  At the previous meeting, we reported that chloronema of Physcomitrella patens subsp. patens produces strigolactones (SLs). In this study, WT and the CCD8 loss-of-function mutant (Ppccd8) of P. patens were grown in liquid BCD culture for about 30 days to obtain gametophores during which the media were replaced with fresh one weekly. Then, they were grown for additional 3 days and media collected were extracted with ethyl acetate and SLs in the extracts were analyzed by LC-MS/MS. Both WT and Ppccd8 were found to produce 7-oxoorobanchyl acetate and strigol at similar levels, while fabacyl acetate, orobanchyl acetate, 7α-hydroxyorobanchyl acetate and orobanchol were produced only by WT. Although there is no MAX1 homolog in the moss genome, P. patens produces SLs, suggesting that MAX1 functions in later steps of the active branching inhibiting hormone biosynthesis, i.e, conversion of SLs to the branching inhibitor. Alternatively the moss may have other P450(s) which replace the function of MAX1 for SL biosynthesis.
  植物化学調節学会, Japanese
  ISSN：0919-1887, CiNii Articles ID：110007767125, CiNii Books ID：AN10348274
• 8-9 根寄生植物ストライガ耐性および感受性トウモロコシが分泌するストリゴラクトンへのアーバスキュラー菌根菌群の感染応答(8.共生,2010年度北海道大会)　　　　　　　　　　　　　　　
  石本 圭子; 米山 香織; 大崎 満; 横田 孝雄; 米山 弘一; 江沢 辰広
  Number：56, First page：46, Last page：46, 07 Sep. 2010
  Japanese
  ISSN：0288-5840, CiNii Articles ID：110008510384, CiNii Books ID：AN00195778
• 2B04 Identification and structure determination of strigolactones from Cucumis sativus　　　　　　　　　　　　　　　
  Xie Xiaonan; Yoneyama Kaori; Uchida Kenichi; Nomura Takahito; Takeuchi Yasutomo; Yoneyama Koichi
  講演要旨集, Number：35, First page：57, Last page：57, 21 Apr. 2010
  日本農薬学会, Japanese
  CiNii Articles ID：110009761682, CiNii Books ID：AN00387542
• 2B05 Cytokinins inhibit strigolactone production in rice　　　　　　　　　　　　　　　
  Yoneyama Kaori; Asahina Masashi; Xie Xiaonan; Nomura Takahito; Takeuchi Yasutomo; Yokota Takao; Yoneyama Koichi
  講演要旨集, Number：35, First page：58, Last page：58, 21 Apr. 2010
  日本農薬学会, Japanese
  CiNii Articles ID：110009761683, CiNii Books ID：AN00387542
• Structure-activity relationship of naturally occurring strigolactones in Orobanche minor seed germination stimulation　　　　　　　　　　　　　　　
  Hyun Il Kim; Xiaonan Xie; Han Sung Kim; Jae Chul Chun; Kaori Yoneyama; Takahito Nomura; Yasutomo Takeuchi; Koichi Yoneyama
  JOURNAL OF PESTICIDE SCIENCE, Volume：35, Number：3, First page：344, Last page：347, 2010
  English
  DOI：https://doi.org/10.1584/jpestics.G10-17
  DOI ID：10.1584/jpestics.G10-17, ISSN：1348-589X, CiNii Articles ID：120005320287, Web of Science ID：WOS:000282860900017
• 55. Effects of GA, IAA, ABA, brassinosteroids and progesterone on antheridium formation and protonemal elongation in Japanese climbing fern　　　　　　　　　　　　　　　
  Yoneyama Kaori; Shibata Kyomi; Yokota Takao
  植物化学調節学会研究発表記録集, Number：44, First page：69, Last page：69, 06 Oct. 2009
  Antheridium of L. japonicum is known to be induced by GA methyl ester. We earlier found that progesterone strongly inhibits GA4-Me induced antheridium formation. This paper reports that IAA and ABA strongly inhibited antheridium formation of L. japonicum. IAA was more biologically active than ABA and progesterorone, 3 times and 14 times, respectively. Protonemal elongation was enhanced by IAA but inhibited by ABA. No biological activity of brassinosteroids, brassinolide and castasterone, was observed in this biological system.
  植物化学調節学会, Japanese
  ISSN：0919-1887, CiNii Articles ID：110007468315, CiNii Books ID：AN10348274
• 56. Effects of auxin and cytokinin on strigolactone production and exudation　　　　　　　　　　　　　　　
  Yoneyama Kaori; Asahina Masashi; Nomura Takahito; Yokota Takao; Yoneyama Koichi
  植物化学調節学会研究発表記録集, Volume：44, Number：44, First page：70, Last page：70, 06 Oct. 2009
  Strigolactone released from plant root stimulates germination of root parasitic plants and induces hyphal branching of arbuscular mycorrhizal fungi in the rhizosphere. In plant, strigolactone works as a plant hormone inhibiting shoot branching. It was already reported that phosphorus (P) deficiency promoted but P fertilization suppressed strigolactone exudation. In the present study, we demonstrated that auxin increased strigolactone exudation when rice plants were subjected to P fertilization, while cytokinin decreased strigolactone exudation when rice plants faced to P deficiency.
  植物化学調節学会, Japanese
  DOI：https://doi.org/10.18978/jscrpanb.44.0_70
  DOI ID：10.18978/jscrpanb.44.0_70, ISSN：0919-1887, CiNii Articles ID：110007468316
• 63. Search for strigolactone biosynthesis inhibitors　　　　　　　　　　　　　　　
  Kato Atsutaka; Kitahata Nobutaka; Ito Shinsaku; Ueno Kotomi; Yoneyama Kaori; Suzuki Yoshihito; Yoneyama Koichi; Kyozuka Junko; Nakano Takeshi; Asami Tadao
  植物化学調節学会研究発表記録集, Number：44, First page：77, Last page：77, 06 Oct. 2009
  Strigolactones are plant secondary metabolites that function as host recognition signals for arbuscular mycorrhizal fungi and root parasitic plants, Striga and Orobanche. Recently, it has been reported that strigolactones act as a novel hormone in shoot branching. In this study, we try to design a strigolactone biosynthesis inhibitor. Strigolactones are synthesized from carotenoids, and in a proposed strigolactione biosynthesis pathway, carotenoid cleavage dioxygenase 7 (CCD7) and CCD8 play an important role. 9-cis-Epoxycarotenoid dioxygenase (NCED) is the most characterized CCD in plants, and a couple of NCED inhibitors including abamine and abamineSG were reported from our group. In this context we estimated that some of NCED inhibitors or their derivatives could inhibit strigolactone biosynthesis and we started to screen our chemical libraries targeted to NCED (CCD). In consequence we found that the treatment of abamine reduced the level of 5-deoxystrigol in root exudates from rice plants, while the treatment of abamineSG, a specific and potent inhibitor of NCED, did not reduced the level of 5-deoxystrigol. Now we continue screening strigolactone biosynthesis inhibitors and try to elucidate structure-activity relationship of abamine and its derivatives.
  植物化学調節学会, Japanese
  ISSN：0919-1887, CiNii Articles ID：110007468323, CiNii Books ID：AN10348274
• 64. Characterization of strigolactones produced by chloronema of Physcomitrella patens and its ccd8 mutant　　　　　　　　　　　　　　　
  Sawabe Makiko; Xie Xiaonan; Yoneyama Kaori; Proust Helene; Hoffmann Beate; Rameau Catherine; Yoneyama Koichi
  植物化学調節学会研究発表記録集, Number：44, First page：78, Last page：78, 06 Oct. 2009
  At the previous meeting, we reported that Physcomitrella patens subsp. patens, a bryophyte which is evolutionary most far from angiosperm, produces strigolactones (SLs). However, we often failed to detect SLs in P. patens grown in liquid culture. In this study, we collected only chloronema and analyzed SLs. The chloronema were obtained from 1-week old cultures of both WT and the CCD8 loss-of-function mutant (Ppccd8), and extracted with ethyl acetate. Characterization of SLs in these extracts was conducted by comparing retention times of germination stimulants on reversed phase HPLC with those of synthetic standards and by using LC-MS/MS. Both WT and Ppccd8 were found to produce SLs including 7-oxoorobanchyl acetate, 7α-hydroxyorobanchyl acetate, and orobanchyl acetate at similar levels. These results indicate that CCD8 homolog in P. patens would be redundant in the chloronema.
  植物化学調節学会, Japanese
  ISSN：0919-1887, CiNii Articles ID：110007468324, CiNii Books ID：AN10348274
• 65. Characterization of strigolactones produced by rice plants　　　　　　　　　　　　　　　
  Harada Yuta; Yokoyama Mori; Xie Xiaonan; Yoneyama Kaori; Takeuchi Yasutomo; Cardoso Catarina; Charnikhova Tatsiana; Bouwmeester Harro; Yoneyama Koichi
  植物化学調節学会研究発表記録集, Number：44, First page：79, Last page：79, 06 Oct. 2009
  Strigolactones (SLs) function in the rhizosphere as host detection signals for both symbionts arbuscular mycorrhizal (AM) fungi and root parasitic plants, and in the plants they act as a class of plant hormones inhibiting shoot branching. In this study, characterization of SLs produced by rice (Oryza sativa L. cv. Nipponbare) was conducted by comparing retention times of germination stimulants on reversed phase HPLC with those of synthetic standards and by LC-MS/MS. In the roots exudates collected from rice plants grown hydroponically, known SLs including 7-oxoorobanchyl acetate, 2'-epiorobanchol, orobanchol, orobanchyl acetate, and 2'-epi-5-deoxystrigol were detected. An unknown peak was detected in the channel for 7-oxoorobanchol (m/z 383>286) with distinct germination stimulation on Orobanche minor and Striga hermonthica seeds. LC-MS/MS and GC/MS analyses indicated that this is a novel SL. Purification and structural elucidation of the novel SL will be presented.
  植物化学調節学会, Japanese
  ISSN：0919-1887, CiNii Articles ID：110007468325, CiNii Books ID：AN10348274
• 66. Identification and structure determination of strigolactones from cucumber root exudate　　　　　　　　　　　　　　　
  Xie Xiaonan; Yoneyama Kaori; Uchida Kenichi; Yokota Takao; Takeuchi Yasutomo; Yoneyama Koichi
  植物化学調節学会研究発表記録集, Number：44, First page：80, Last page：80, 06 Oct. 2009
  Strigolactone are plant secondary metabolites which function as host recognition signals for arbuscular mycorrhizal fungi and root parasitic plants, Striga and Orobanche. Recently, strigolactones have been identified as a novel class of plant hormones inhibiting shoots branching. In this study, characterization of strigolactones in cucumber (Cucumis sativus L.) root exudate was conducted. Cucumber was found to produce at least 9 germination stimulants including orobanchol, orobanchyl acetate, 7-oxoorobanchyl acetate, and 7-oxoorobanchol. In addition to these, two novel strigolactones were isolated and their structures were determined as 7α-hydroxy-orobanchyl acetate and 7β-hydroxy-orobanchyl acetate by 1D and 2D NMR spectroscopy, CD, and ESI- and EI-MS spectrometries.
  植物化学調節学会, Japanese
  ISSN：0919-1887, CiNii Articles ID：110007468326, CiNii Books ID：AN10348274
• 9-34 イネのストリゴラクトン生産・分泌を制御するシグナル(9.植物の多量栄養素,2009年度京都大会)　　　　　　　　　　　　　　　
  米山 香織; 朝比奈 雅志; 野村 崇人; 米山 弘一; 横田 孝雄
  Volume：55, Number：55, First page：76, Last page：76, 15 Sep. 2009
  Japanese
  DOI：https://doi.org/10.20710/dohikouen.55.0_76_1
  DOI ID：10.20710/dohikouen.55.0_76_1, ISSN：0288-5840, CiNii Articles ID：110007719951
• Seed Germination : Physiology, Ecology and Molecular Mechanisms　　　　　　　　　　　　　　　
  BASKIN Carol C.; BASKIN Jerry M.; YOSHIOKA Toshihito; SEIWA Kenji; OZKAN Hakan; NONOGAKI Hiroyuki
  種生物学研究, Volume：32, First page：1, Last page：436, 31 Mar. 2009
  Japanese
  ISSN：0913-5561, CiNii Articles ID：10027795488, CiNii Books ID：AN10152669
• Signal Function of Plant Nutrition(Division 4: Plant Nutrition)　　　　　　　　　　　　　　　
  Sekimoto H; Yoneyama K
  Journal of the science of soil and manure, Japan, Volume：79, Number：6, First page：573, Last page：577, 13 Mar. 2009
  一般社団法人日本土壌肥料学会, Japanese
  DOI：https://doi.org/10.20710/dojo.79.6_573
  DOI ID：10.20710/dojo.79.6_573, ISSN：0029-0610, CiNii Articles ID：110007328266, CiNii Books ID：AN00195767
• 8B-1 Strigolactones, structural diversity and distribution in the plant kingdom　　　　　　　　　　　　　　　
  Yoneyama Koichi; Xie Xiaonan; Yoneyama Kaori; Takeuchi Yasutomo
  講演要旨集, Number：34, First page：36, Last page：36, 27 Feb. 2009
  日本農薬学会, Japanese
  CiNii Articles ID：110009761535, CiNii Books ID：AN00387542
• 9C22 Characterization of strigolactones produced and exuded by rice plants　　　　　　　　　　　　　　　
  Yoneyama Kaori; Xie Xianon; Takeuchi Yasutomo; Yokota Takao; Yoneyama Koichi
  講演要旨集, Number：34, First page：139, Last page：139, 27 Feb. 2009
  日本農薬学会, Japanese
  CiNii Articles ID：110009761635, CiNii Books ID：AN00387542
• Structural diversity and distribution of strigolactones in the plant kingdom　　　　　　　　　　　　　　　
  Koichi Yoneyama; Xiaonan Xie; Kaori Yoneyama; Yasutomo Takeuchi
  JOURNAL OF PESTICIDE SCIENCE, Volume：34, Number：4, First page：302, Last page：305, 2009
  Japanese, Book review
  DOI：https://doi.org/10.1584/jpestics.34.302
  DOI ID：10.1584/jpestics.34.302, ISSN：1348-589X, eISSN：1349-0923, CiNii Articles ID：110007482302, Web of Science ID：WOS:000274116300011
• 1. Increased phosphate level in shoots retards production and exudation of strigolactones　　　　　　　　　　　　　　　
  Yoneyama Kaori; Sekimoto Hitoshi; Takeuchi Yasutomo; Yoneyama Koichi
  植物化学調節学会研究発表記録集, Number：43, First page：15, Last page：15, 06 Oct. 2008
  Strigolactones are important host-recognition signals to commence parasitism by root parasitic weeds and mutualism by arbuscular mycorrhizal fungi and a novel class of plant hormones. Here we show that an increase of phosphate level but not the level in shoots retards production and exudation of strigolactones by using the root-split system of sorghum.
  植物化学調節学会, Japanese
  ISSN：0919-1887, CiNii Articles ID：110007468175, CiNii Books ID：AN10348274
• 2. Isolation and structure determination of a novel strigolactone fabacyl acetate　　　　　　　　　　　　　　　
  Xie Xiaonan; Yoneyama Kaori; Harada Yuta; Fusegi Noria; Yamada Yoichi; Ito Satoshi; Yokota Takao; Takeuchi Yasutomo; Yoneyama Koichi
  植物化学調節学会研究発表記録集, Number：43, First page：16, Last page：16, 06 Oct. 2008
  Strigolactones are plant secondary metabolites that function as host recognition signals for arbuscular mycorrhizal fungi and root parasitic plants, Striga and Orobanche, and, in addition, plant hormones inhibiting shoot outgrowth. In this study, a novel strigolactone fabacyl acetate was purified from root exudates of pea (Pisum sativum L.) and its structure was determined as ent-2'-epi-4a,8a-epoxyorobanchyl acetate, by 1D and 2D NMR spectroscopy, ESI- and EI-MS spectrometry, X-ray crystallography, and by comparing ^1H NMR spectral data and retention times in LC-MS and GC-MS with those of synthetic standards prepared from (+)-orobanchol and (+)-2'-epiorobanchol. The ^1H NMR spectral data and retention times of fabacyl acetate were identical with those of an isomer prepared from (+)-2'-epiorobanchol except for the opposite sign in CD spectra.
  植物化学調節学会, Japanese
  ISSN：0919-1887, CiNii Articles ID：110007468176, CiNii Books ID：AN10348274
• 3. Characterization of strigolactones produced by Physcomitrella patens subsp. patens　　　　　　　　　　　　　　　
  Xie Xiaonan; Yoneyama Kaori; Harada Yuta; Sekine Megumi; Takeuchi Yasutomo; Yoneyama Koichi
  植物化学調節学会研究発表記録集, Number：43, First page：17, Last page：17, 06 Oct. 2008
  Strigolactones produced by a moss, Physcomitrella patens subsp. patens, were examined. Major strigolactones found in the ethyl acetate extract of the moss plants were identified as orobanchyl acetate, 7-oxoorobanchyl acetate, 7-hydroxyorobanchyl acetate, and ent-2'-epi-4a,8a-epoxyorobanchyl acetate (fabacyl acetate), by both ESI-LC/MS and GC/MS analyses. In addition to these strigolactones, orobanchol and sorgomol were detected by ESI-LC/MS. These results indicate that Physcomitrella patens is a good model plant for the study on biosynthesis of strigolactones.
  植物化学調節学会, Japanese
  ISSN：0919-1887, CiNii Articles ID：110007468177, CiNii Books ID：AN10348274
• 4. Characterization of strigolactones produced by onion　　　　　　　　　　　　　　　
  Harada Yuta; Xie Xiaonan; Yoneyama Kaori; Takeuchi Yasutomo; Yoneyama Koichi
  植物化学調節学会研究発表記録集, Number：43, First page：18, Last page：18, 06 Oct. 2008
  Plants belong to the Liliacae family such as onion depend largely on symbiosis with arbuscular mycorrhizal (AM) fungi for the supply of mineral nutrients due to their rather poor root systems. In this study, characterization of strigolactones produced by onion (Allium cepa L.) was conducted by comparing retention times of germination stimulants on ODS-HPLC with those of synthetic standards and by LC/MS/MS. The root exudates from onion plants were found to contain at least 4 strigolactones, orobanchyl acetate, 7-oxoorobanchyl acetate, ent-2'-epi-4a,8a-epoxyorobanchyl acetate (fabacyl acetate), and 5-deoxystrigol.
  植物化学調節学会, Japanese
  ISSN：0919-1887, CiNii Articles ID：110007468178, CiNii Books ID：AN10348274
• 5. Characterization of strigolactones produced and exuded by rice　　　　　　　　　　　　　　　
  Yoneyama Kaori; Xie Xiaonan; Harada Yuta; Matsuyama Mayumi; Sekine Megumi; Takeuchi Yasutomo; Yoneyama Koichi
  植物化学調節学会研究発表記録集, Number：43, First page：19, Last page：19, 06 Oct. 2008
  Recently, strigolactones that were previously known as germination stimulants of root parasitic plants and hyphal branching factors of symbiotic arbuscular mycorrhizal fungi, have been shown to be a novel class of plant hormones inhibiting shoot outgrowth. In this study, characterization of strigolactones in the root exudates from 4 cultivars of rice plants grown hydroponically was conducted by comparing retention times of germination stimulants on reversed phase HPLC with those of synthetic and natural standards and by using LC/MS/MS.
  植物化学調節学会, Japanese
  ISSN：0919-1887, CiNii Articles ID：110007468179, CiNii Books ID：AN10348274
• 7. Screening of strigolactone biosynthesis inhibitors　　　　　　　　　　　　　　　
  Ito Shinsaku; Kato Atsutaka; Hanada Atsushi; Yoneyama Kaori; Kitahata Nobutaka; Umehara Mikihisa; Suzuki Yoshihito; Yoneyama Koichi; Yamaguchi Shinjiro; Asami Tadao
  植物化学調節学会研究発表記録集, Number：43, First page：21, Last page：21, 06 Oct. 2008
  Shoot branching plays an important role in plant morphogenesis. Previous studies have suggested the novel branching hormone derived from carotenoids inhibit bud outgrowth. Recently, it has been reported that strigolactones (SL) act as a novel hormone in shoot branching. Strigolactones are rhizosphere signaling for the root parasitic weeds and symbiotic arbuscular mycorrhizal fungi. In the proposed biosynthesis pathway, carotenoid cleavage dioxygenase 7 (CCD7) and CCD8 are involved in SL biosynthesis and catalyse cartenoid cleavage reaction. 9-cis-Epoxycarotenoid dioxygenase (NCED) is the most characterized CCD in plants, and we previously identified some NCED inhibitors. To design a strigolactone biosynthesis inhibitor, we screened our chemical libraries targeted to NCED and found abamine, previously identified as NCED inhibitor, reduced the level of 5-deoxystrigol in root exudates. However abamineSG, a specific and potent inhibitor of NCED, did not reduced the level of 5-deoxystrigol.
  植物化学調節学会, Japanese
  ISSN：0919-1887, CiNii Articles ID：110007468181, CiNii Books ID：AN10348274
• 8-1 養分条件が植物のストリゴラクトン生産・分泌に与える影響(8.共生,2008年度愛知大会)　　　　　　　　　　　　　　　
  米山 香織; 関本 均; 竹内 安智; 米山 弘一
  Number：54, First page：57, Last page：57, 09 Sep. 2008
  Japanese
  ISSN：0288-5840, CiNii Articles ID：110007456609, CiNii Books ID：AN00195778
• Production of Strigolactones by Arabidopsis thaliana responsible for Orobanche aegyptiaca seed germination　　　　　　　　　　　　　　　
  Yaakov Goldwasser; Kaori Yoneyama; Xiaonan Xie; Koichi Yoneyama
  PLANT GROWTH REGULATION, Volume：55, Number：1, First page：21, Last page：28, May 2008
  English
  DOI：https://doi.org/10.1007/s10725-008-9253-z
  DOI ID：10.1007/s10725-008-9253-z, ISSN：0167-6903, CiNii Articles ID：80019452661, Web of Science ID：WOS:000254460700003
• C216 How mineral nutrients affect the production and/or exudation of strigolactones　　　　　　　　　　　　　　　
  Yoneyama Kaori; Sekimoto Hitoshi; Takeuchi Yasutomo; Yoneyama Koichi
  講演要旨集, Volume：33, Number：33, First page：80, Last page：80, 11 Mar. 2008
  日本農薬学会, Japanese
  CiNii Articles ID：110006858219, CiNii Books ID：AN00387542
• C217 Evaluation of strigolactones for seed germination stimulation of root parasitic plants　　　　　　　　　　　　　　　
  Kim Hyun-il; Yoneyama Kaori; Xie Xiaonan; Takeuchi Yasutomo; Yoneyama Koichi
  講演要旨集, Volume：33, Number：33, First page：81, Last page：81, 11 Mar. 2008
  日本農薬学会, Japanese
  CiNii Articles ID：110006858220, CiNii Books ID：AN00387542
• C218 Germination stimulants for root parasitic plants produced by cucumber plants　　　　　　　　　　　　　　　
  Xie Xiaonan; Yoneyama Kaori; Kusumoto Dai; Kim Hyun-il; Yamada Yoichi; Takeuchi Yasutomo; Yoneyama Koichi
  講演要旨集, Volume：33, Number：33, First page：82, Last page：82, 11 Mar. 2008
  日本農薬学会, Japanese
  CiNii Articles ID：110006858221, CiNii Books ID：AN00387542
• 第19回国際植物生長物質会議に参加して(5)(第19回国際植物生長物質会議派遣補助金受賞者報告,談話室)　　　　　　　　　　　　　　　
  米山 香織
  Volume：42, Number：2, First page：191, Last page：192, 20 Dec. 2007
  Japanese
  DOI：https://doi.org/10.18978/jscrp.42.2_191_3
  DOI ID：10.18978/jscrp.42.2_191_3, ISSN：1346-5406, CiNii Articles ID：110006533792
• The 19th IPGSA Conference report　　　　　　　　　　　　　　　
  HNINSI Moe
  Regulation of plant growth & development, Volume：42, Number：2, First page：190, Last page：195, 20 Dec. 2007
  植物化学調節学会, Japanese
  ISSN：1346-5406, CiNii Articles ID：10020225314, CiNii Books ID：AA11550064
• ii. Weed Control(1. Chemistry Including Natural Products, Poster Session Category I)　　　　　　　　　　　　　　　
  森本 正則; 謝 肖男; 上岡 弘明; 米山 香織
  Journal of pesticide science, Volume：32, Number：0, First page：S82, Last page：S84, 10 Oct. 2007
  日本農薬学会, Japanese
  ISSN：1348-589X, CiNii Articles ID：110006453223, CiNii Books ID：AA11818622
• Isolation and structure determination of a novel strigolactone, (+)-sorgomol, from sorghum root exudate　　　　　　　　　　　　　　　
  XIE Xiaonan; YONEYAMA Kaori; KUSUMOTO Dai; YAMADA Yoichi; TAKEUCHI Yasutomo; YONEYAMA Koichi
  Volume：42, First page：74, Last page：74, 05 Oct. 2007
  Sorghum (Sorghum bicolor) is an important food crop in Africa and a host of the devastating root parasitic weed Striga hermonthica. Seeds of root parasitic weeds germinate only when they are exposed to exogenous germination stimulants produced by and released from roots of host and some non-host plants. Sorghum has already been shown to exude sorgolactone, strigol, and 5-deoxystrigol. In addition to these known strigolactones, an isomer of strigol was identified in root exudates of sorghum cultivars M800 and Hybrid. This novel strigolactone, named sorgomol, was isolated and its structure was determined as (3aR,8R,8bS,E)-8-(hydroxymethyl)-8-methyl-3-(((R)-4-memyl-5-oxo-2,5-dihydromran-2-yloxy)methyleme)-3a,4,5,6,7,8-hexahydro-3H-indeno[1,2-b]furan-2(8bH)-one by 1D and 2D NMR spectroscopy and ESI- and EI-MS spectrometry.
  The Japanese Society for Chemical Regulation of Plants, Japanese
  ISSN：1346-5406, CiNii Articles ID：110006474754, CiNii Books ID：AA11550064
• Characterization of strigolactones, host recognition signals for arbuscular mycorrhizal fungi and root parasitic plants, produced by pea　　　　　　　　　　　　　　　
  HARADA Yuta; XIE Xiaonan; KUSUMOTO Dai; FUSEGI Norio; YONEYAMA Kaori; TAKEUCHI Yasutomo; YAMADA Yoichi; YOKOTA Takao; YONEYAMA Koichi
  Volume：42, First page：75, Last page：75, 05 Oct. 2007
  Strigolactones are plant secondary metabolites which function as host recognition signals for arbuscular mycorrhizal (AM) fungi and root parasitic plants, Striga and Orobanche. Plants exudates cocktails of strigolactones and their compositions differ with plant species, their growth stages, and growth conditions. In this study, characterization of strigolactones produced by pea (Pisum sativum L.), a host of Orobanche, was conducted by comparing retention times of germination stimulants on ODS-HPLC with those of synthetic standards and by LC/MS/MS. In the root exudates collected from pea plants grown hydroponically, orobanchol, orobanchyl acetate, and a novel strigolactone were detected as major stimulants. Purification and structural elucidation of the novel strigolactone will be presented.
  The Japanese Society for Chemical Regulation of Plants, Japanese
  ISSN：1346-5406, CiNii Articles ID：110006474755, CiNii Books ID：AA11550064
• 61. Isolation and structure determination of a novel strigolactone, (+)-sorgomol, from sorghum root exudate　　　　　　　　　　　　　　　
  Xie Xiaonan; Yoneyama Kaori; Kusumoto Dai; Yamada Yoichi; Takeuchi Yasutomo; Yoneyama Koichi
  植物化学調節学会研究発表記録集, Volume：42, Number：42, 05 Oct. 2007
  Sorghum (Sorghum bicolor) is an important food crop in Africa and a host of the devastating root parasitic weed Striga hermonthica. Seeds of root parasitic weeds germinate only when they are exposed to exogenous germination stimulants produced by and released from roots of host and some non-host plants. Sorghum has already been shown to exude sorgolactone, strigol, and 5-deoxystrigol. In addition to these known strigolactones, an isomer of strigol was identified in root exudates of sorghum cultivars M800 and Hybrid. This novel strigolactone, named sorgomol, was isolated and its structure was determined as (3aR,8R,8bS,E)-8-(hydroxymethyl)-8-methyl-3-(((R)-4-memyl-5-oxo-2,5-dihydromran-2-yloxy)methyleme)-3a,4,5,6,7,8-hexahydro-3H-indeno[1,2-b]furan-2(8bH)-one by 1D and 2D NMR spectroscopy and ESI- and EI-MS spectrometry.
  植物化学調節学会, Japanese
  ISSN：0919-1887, CiNii Articles ID：110006474754
• 62. Characterization of strigolactones, host recognition signals for arbuscular mycorrhizal fungi and root parasitic plants, produced by pea　　　　　　　　　　　　　　　
  Harada Yuta; Xie Xiaonan; Kusumoto Dai; Fusegi Norio; Yoneyama Kaori; Takeuchi Yasutomo; Yamada Yoichi; Yokota Takao; Yoneyama Koichi
  植物化学調節学会研究発表記録集, Volume：42, Number：42, 05 Oct. 2007
  Strigolactones are plant secondary metabolites which function as host recognition signals for arbuscular mycorrhizal (AM) fungi and root parasitic plants, Striga and Orobanche. Plants exudates cocktails of strigolactones and their compositions differ with plant species, their growth stages, and growth conditions. In this study, characterization of strigolactones produced by pea (Pisum sativum L.), a host of Orobanche, was conducted by comparing retention times of germination stimulants on ODS-HPLC with those of synthetic standards and by LC/MS/MS. In the root exudates collected from pea plants grown hydroponically, orobanchol, orobanchyl acetate, and a novel strigolactone were detected as major stimulants. Purification and structural elucidation of the novel strigolactone will be presented.
  植物化学調節学会, Japanese
  ISSN：0919-1887, CiNii Articles ID：110006474755
• 63. How mineral nutrients affect the production and exudation of strigolactones by sorghum　　　　　　　　　　　　　　　
  Yoneyama Kaori; Sekimoto Hitoshi; Takeuchi Yasutomo; Yoneyama Koichi
  植物化学調節学会研究発表記録集, Volume：42, Number：42, 05 Oct. 2007
  Strigolactones are important host-recognition chemicals to commence parasitism by root parasitic weeds and mutualism by arbuscular mycorrhizal (AM) fungi. We already reported that effects of nutrient deficiencies on strigolactone exudation vary with plant species. In this study, the effects of mineral nutrients on the production and exudation of 5-deoxystrigol, one of main strigolactones exuded by sorghum, were examined in detail.
  植物化学調節学会, Japanese
  ISSN：0919-1887, CiNii Articles ID：110006474756
• 植物の根に関する諸問題(170)根が分泌する根寄生植物およびAM菌の宿主認識シグナル　　　　　　　　　　　　　　　
  米山 香織; 関本 均
  Volume：82, Number：9, First page：1025, Last page：1030, Sep. 2007
  Japanese
  ISSN：0369-5247, CiNii Articles ID：40015609659, CiNii Books ID：AN0038751X
• 8-22 養分条件がソルガムのストリゴラクトン-AM菌と根寄生植物の宿主認識シグナル-生産・分泌に与える影響(8.共生,2007年度東京大会)　　　　　　　　　　　　　　　
  米山 香織; 関本 均; 竹内 安智; 米山 弘一
  Number：53, First page：59, Last page：59, 22 Aug. 2007
  Japanese
  ISSN：0288-5840, CiNii Articles ID：110006598253, CiNii Books ID：AN00195778
• 30 ホスト植物が同化した炭素・窒素の根寄生植物への分配様式のPETIS法によるイメージング(関東支部講演会,2006年度各支部会)　　　　　　　　　　　　　　　
  本田 修三; 関本 均; 加藤 翔太; 落合 由記子; 山口 良恵; 米山 香織; 米山 弘一; 竹内 安智; 河地 有木; 藤巻 秀; 鈴井 伸郎; 石井 里美; 石岡 典子; 松橋 信平
  Volume：53, Number：53, 22 Aug. 2007
  Japanese
  ISSN：0288-5840, J-Global ID：200902235237404008, CiNii Articles ID：110006598782
• C306 Novel germination stimulants for root parasitic plants produced by flax plants　　　　　　　　　　　　　　　
  Xie Xiaonan; Yoneyama Kaori; Kusumoto Dai; Kurita Jun-ya; Yamada Yoichi; Takeuchi Yasutomo; Yoneyama Koichi
  講演要旨集, Volume：32, Number：32, First page：81, Last page：81, 09 Mar. 2007
  日本農薬学会, Japanese
  CiNii Articles ID：110006372562, CiNii Books ID：AN00387542
• How mineral nutrients affect the production of strigolactones by plants　　　　　　　　　　　　　　　
  YONEYAMA Kaori; SEKIMOTO Hitoshi; TAKEUCHI Yasutomo; YONEYAMA Koichi
  Volume：41, First page：69, Last page：69, 04 Oct. 2006
  The Japanese Society for Chemical Regulation of Plants, Japanese
  ISSN：1346-5406, CiNii Articles ID：110006168816, CiNii Books ID：AA11550064
• 54.How mineral nutrients affect the production of strigolactones by plants　　　　　　　　　　　　　　　
  Yoneyama Kaori; Sekimoto Hitoshi; Takeuchi Yasutomo; Yoneyama Koichi
  植物化学調節学会研究発表記録集, Volume：41, Number：41, 04 Oct. 2006
  植物化学調節学会, Japanese
  ISSN：0919-1887, CiNii Articles ID：110006168816
• P8-1 栄養条件は宿主植物の寄生・共生開始シグナル分泌に影響する(8. 共生, 2006年度秋田大会講演要旨)　　　　　　　　　　　　　　　
  米山 香織; 竹内 安智; 米山 弘一; 関本 均
  Number：52, First page：46, Last page：46, 05 Sep. 2006
  Japanese
  ISSN：0288-5840, CiNii Articles ID：110006287440, CiNii Books ID：AN00195778
• 11 ^<13>Nを用いたホスト植物根吸収窒素の根寄生植物による収奪の可視化と収奪率の定量解析(関東支部講演会, 2005年度各支部会講演要旨)　　　　　　　　　　　　　　　
  本田 修三; 関本 均; 松木 良祐; 米山 香織; 落合 由記子; 米山 弘一; 竹内 安智; 松橋 信平; 河地 有木; 藤巻 秀; 阪本 浩一; 鈴井 伸郎; 石井 里美; 石岡 典子; 渡辺 智; 荒川 和夫; 久米 民和
  Number：52, First page：259, Last page：259, 05 Sep. 2006
  Japanese
  ISSN：0288-5840, CiNii Articles ID：110006288010, CiNii Books ID：AN00195778
• C203 Strigolactones, germination stimulants for root parasitic plants, produced by and released from dicotyledonous plants　　　　　　　　　　　　　　　
  Yoneyama Kaori; Sekimoto Hitoshi; Takeuchi Yasutomo; Yoneyama Koichi
  講演要旨集, Volume：31, Number：31, First page：76, Last page：76, 10 Mar. 2006
  日本農薬学会, Japanese
  CiNii Articles ID：110006372451, CiNii Books ID：AN00387542
• 11. The response to phosphorus availability of the production and/or exudation of orobanchol, germination stimulant for root parasitic plants, in red clover　　　　　　　　　　　　　　　
  Yoneyama Kaori; Takeuchi Yasutomo; Yoneyama Koichi; Sekimoto Hitoshi
  植物化学調節学会研究発表記録集, Number：40, First page：30, Last page：30, 13 Oct. 2005
  Among mineral nutrients, reduced supply of phosphorus significantly enhanced production and/or exudation of the germination stimulant orobanchol for Orobanche minor by red clover plants grown hydroponically. Therefore, response of orobanchol exudation to phosphorus availability was examined in detail. Orobanchol exudation greatly increased 48 hours after transferring to low P condition (8μM P). The plants exuded more orobanchol when grown in media with lower P levels. When the plants were continuously grown at 8μM P, orobanchol exudation continued to increase further with incubation period. By contrast, when the plants grown at 8μM P were transferred to 80 or 160μM P, orobanchol exudation decreased within the first 24 hours. These data suggest that red clover plants sense and respond quickly to changes of phosphorus availability in soil and regulate biosynthesis and/or exudation of strigolactones.
  植物化学調節学会, Japanese
  ISSN：0919-1887, CiNii Articles ID：110002552709, CiNii Books ID：AN10348274
• 42. Genes involved in biosynthesis and metabolism of germination stimulants, strigolactones　　　　　　　　　　　　　　　
  Fukasawa Masashi; Matsukubo Tomo; Yoneyama Kaori; Iino Mayumi; Goda Hideki; Asami Tadao; Yoshida Shigeo; Takeuchi Yasutomo; Nakano Takeshi; Yoneyama Koichi
  植物化学調節学会研究発表記録集, Number：40, First page：61, Last page：61, 13 Oct. 2005
  Root parasitic plants depend on their hosts for water and nutrients. The seeds of these parasites germinate when they receive stimulants secreted from roots of host and some non-host plants. To date, several germination stimulants, collectively called strigolactones, have been isolated, but their biosynthetic pathway has not been clarified. Recently, Arabidopsis thaliana was shown to be susceptible to root parasites including some Orobanche species and we have demonstrated that one of major germination stimulants produced by Arabidopsis is orobanchol. Therefore, microarray analysis was performed to identify genes involved in biosynthesis and metabolism of strigolactones in Arabidopsis. Two new P450 oxidases with unknown functions and an ABC transporter were identified as highly responsive to strigol treatment. Further analyses with using knock-out mutants of these genes are now in progress.
  植物化学調節学会, Japanese
  ISSN：0919-1887, CiNii Articles ID：110002552740, CiNii Books ID：AN10348274
• Effects of nutrients on the production of germination stimulants for root parasitic plants by red clover　　　　　　　　　　　　　　　
  YONEYAMA Kaori; TAKEUCHI Yasutomo; YONEYAMA Koichi; SEKIMOTO Hitoshi
  Volume：39, First page：58, Last page：58, 28 May 2005
  Orobanche species causing enormous damage to the agriculture prevail on nutrient deficient soils and their emergence is often suppressed by the application of fertilizers. However, it has not been clarified yet whether nutrients affect the production of germination stimulants or that of germination inhibitors. Therefore in this study, the amount of orobanchol, one of germination stimulants for O. minor Sm., in the root exudates of its host red clover (Trifolium pratense L. cv. Makimidori) plants grown hydroponically under various low nutrient levels (N, P, K, Ca, and Mg) were quantified by using LC/MS/MS. In addition, germination stimulant activities of the root exudates were also assessed by bioassays.
  The Japanese Society for Chemical Regulation of Plants, Japanese
  ISSN：1346-5406, CiNii Articles ID：110002552652, CiNii Books ID：AA11550064
• 37. Effects of nutrients on the production of germination stimulants for root parasitic plants by red clover　　　　　　　　　　　　　　　
  Yoneyama Kaori; Takeuchi Yasutomo; Yoneyama Koichi; Sekimoto Hitoshi
  植物化学調節学会研究発表記録集, Volume：39, Number：39, 13 Oct. 2004
  Orobanche species causing enormous damage to the agriculture prevail on nutrient deficient soils and their emergence is often suppressed by the application of fertilizers. However, it has not been clarified yet whether nutrients affect the production of germination stimulants or that of germination inhibitors. Therefore in this study, the amount of orobanchol, one of germination stimulants for O. minor Sm., in the root exudates of its host red clover (Trifolium pratense L. cv. Makimidori) plants grown hydroponically under various low nutrient levels (N, P, K, Ca, and Mg) were quantified by using LC/MS/MS. In addition, germination stimulant activities of the root exudates were also assessed by bioassays.
  植物化学調節学会, Japanese
  ISSN：0919-1887, CiNii Articles ID：110002552652

• 植物の多次元コミュニケーションダイナミクス : 分子メカニズムから農業応用の可能性まで　　　　　　　　　　　　　　　
  米山香織, [Joint work]
  Feb. 2025
  Japanese, Total pages：2, 8, 346, 10p, 図版 34p
  CiNii Books：http://ci.nii.ac.jp/ncid/BD10554773
  ISBN：9784860439422, CiNii Books ID：BD10554773

• JAPANESE SOCIETY OF SOIL SCIENCE AND PLANT NUTRITION
• PESTICIDE SCIENCE SOCIETY OF JAPAN
• JAPAN SOCIETY FOR BIOSCIENCE, BIOTECHNOLOGY, AND AGROCHEMISTRY
• THE JAPANESE SOCIETY OF PLANT PHYSIOLOGISTS
• THE JAPANESE SOCIETY FOR CHEMICAL REGULATION OF PLANTS

• 真の枝分かれ抑制ホルモンの化学構造、生理機能、生合成経路の解明　　　　　　　　　　　　　　　
  01 Apr. 2021 - 31 Mar. 2026
  Grant amount(Total)：16770000, Direct funding：12900000, Indirect funding：3870000
  Grant number：21H02125
• 未知ストリゴラクトン代謝経路におけるHIS1/HSLファミリーの機能的役割の解明　　　　　　　　　　　　　　　
  01 Apr. 2022 - 31 Mar. 2025
  Grant amount(Total)：17420000, Direct funding：13400000, Indirect funding：4020000
  Grant number：22H02270
• Elucidation of the germination controlling mechanism of root parasitic plants by tryptophan related chemicals　　　　　　　　　　　　　　　
  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B), Grant-in-Aid for Scientific Research (B), 01 Apr. 2022 - 31 Mar. 2025
  Meiji University
  Grant amount(Total)：17680000, Direct funding：13600000, Indirect funding：4080000
  Grant number：22H02276
• Regulation of strigolactone biosynthesis in Arabidopsis　　　　　　　　　　　　　　　
  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C), Grant-in-Aid for Scientific Research (C), 01 Apr. 2019 - 31 Mar. 2022
  YONEYAMA KAORI, Ehime University
  Grant amount(Total)：4420000, Direct funding：3400000, Indirect funding：1020000
  In Arabidopsis thaliana (Col-0), nitrogen deficiency significantly promoted the expression of strigolactone (SL) biosynthetic genes. In Atd14 mutants, carlactone and methyl carlactonoate, major SLs of Arabidopsis, accumulated under nitrogen deficiency. Furthermore, the expression of MAX1, which is involved in the conversion of carlactone into carlactonoic acid, increased within 3 hours after beginning of light period. These results suggest that for successful SL detection/quantification in Arabidopsis, it is better to grow plants under nitrogen deficiency and harvest them within 3 hours after beginning of light period.
  Grant number：19K05757
• ストリゴラクトン生産・分泌制御を介したアーバスキュラー菌根菌利用技術の確立　　　　　　　　　　　　　　　
  2017 - 2021
  Principal investigator
• Characterization of shoot-branching inhibiting hormones, their functions and biosynthesis　　　　　　　　　　　　　　　
  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), 01 Apr. 2016 - 31 Mar. 2019
  YONEYAMA KOICHI, Utsunomiya University
  Grant amount(Total)：17940000, Direct funding：13800000, Indirect funding：4140000
  Structure- and stereospecific transport of strigolactones (SLs) from roots to shoots suggested that true shoot branching inhibitory hormones are not canonical-SLs such as strigol and orobanchol. For example, in rice plants, an orobanchol-type SL producer, strigol applied to roots inhibited tillering (shoot branching) but was not detected in shoots harvested 20 hours after treatment. Two carlactone (CL) derivatives were detected in the xylem saps from different plant species including rice, tomato, pumpkin, and cucumber, and their structures were found to be hydroxycalactonoic acid and its methyl ester based on the comparison of their LC-MS/MS data with those of synthetic standards. Unfortunately, we could not isolate pure compounds enough for NMR measurements and thus their structures have not yet confirmed. Further studies are needed to ambiguously determine their structures and confirm their biological functions.
  Grant number：16H04914
• Function of novel strigolactone biosynthesis genes in Arabidopsis　　　　　　　　　　　　　　　
  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B), Grant-in-Aid for Young Scientists (B), 01 Apr. 2016 - 31 Mar. 2019
  Yoneyama Kaori
  Grant amount(Total)：4160000, Direct funding：3200000, Indirect funding：960000
  Strigolactone (SL) is a shoot branching inhibitory plant hormone. The objective of this study is to elucidate the SL biosynthetic pathway and active shoot branching inhibitor by clarifying the function of novel SL biosynthetic genes. We reported that carlactone (CL) and methyl carlactonoate (MeCLA), SL intermediates accumulate in Arabidopsis lbo mutants and MeCLA is consumed as a substrate and [MeCLA+16 Da] compound is produced by recombinant LBO protein expressed in E. coli in PNAS paper (Brewer et al. 2016). Then, we found that [MeCLA+16 Da] is hydroxyMeCLA and exists in Arabidopsis SL insensitive mutants of Atd14 and not in lbo mutants (Yoneyama et al. in preparation). We also reported the function of MAX1 homologs, working upstream of LBO, in important major crops, model tree popular and model lower plant fern in New Phytologist (Yoneyama et al. 2018).
  Grant number：16K18560
• Strigolactone biosynthesis and its regulation mechanism in plant　　　　　　　　　　　　　　　
  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Fund for the Promotion of Joint International Research (Fostering Joint International Research (A)), 2019 - 2019
  Ehime University
  Grant amount(Total)：13910000, Direct funding：10700000, Indirect funding：3210000
  Grant number：19KK0395
• ストリゴラクトン生合成の調節メカニズムに関する研究　　　　　　　　　　　　　　　
  24 Apr. 2015 - 31 Mar. 2018
  Grant amount(Total)：4420000, Direct funding：3400000, Indirect funding：1020000
  Grant number：15J40043
• ストリゴラクトンの生理機能とその調節メカニズムに関する研究　　　　　　　　　　　　　　　
  2010 - 2012
  Grant amount(Total)：3482532, Direct funding：3482532
  Grant number：10J09996