2022 Fiscal Year Final Research Report
Studies on plant signaling pathways involved in negative regulation of root nodule symbiosis
Project/Area Number |
19H03239
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Single-year Grants |
Section | 一般 |
Review Section |
Basic Section 44030:Plant molecular biology and physiology-related
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Research Institution | University of Tsukuba |
Principal Investigator |
Suzaki Takuya 筑波大学, 生命環境系, 准教授 (40575825)
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Project Period (FY) |
2019-04-01 – 2022-03-31
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Keywords | 根粒共生 / 植物微生物相互作用 / 転写因子 / ミヤコグサ / シグナル伝達 / マメ科植物 / 窒素 / 硝酸 |
Outline of Final Research Achievements |
It is known that legumes prevent unnecessary loss of carbon source due to symbiosis by suppressing root nodule symbiosis (RNS) in the presence of sufficient nitrogen nutrients. Hoewever, the molecular basis of the mechanisms remains unclear. In this research project, using Lotus japonicus, we found that a signaling pathway mediated by two NLP transcription factors (LjNLP1/4) and the nitrate transporter LjNRT2.1 plays a central role in the negative regulation of RNS in response to nitrate. We also identified novel peptides that function in response to nitrogen and revealed that they play essential roles for the establishment of RNS. These findings have deepened our understanding of the mechanisms of plant adaptation to nitrogen environments.
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Free Research Field |
植物分子生物学
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Academic Significance and Societal Importance of the Research Achievements |
持続可能な社会の実現に向けて、肥料に頼らない農業展開が世界的な喫緊の課題である。ダイズやエンドウマメなどのマメ科植物は窒素固定細菌の根粒菌と共生関係を築くことで、空中窒素を肥料として利用することができる。本研究課題は植物と根粒菌の共生の仕組み及び窒素栄養に対する植物の応答の仕組みの一端を明らかにした。得られた成果に基づいて今後研究を深めていくことによって、低施肥農業の実現や貧栄養の土地での農業実現が期待される。
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