2021 Fiscal Year Final Research Report
Unraveling mechanism underlying phototropin signaling based on cell-aunomous function of RPT2
| Project/Area Number |
19K06721
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 44030:Plant molecular biology and physiology-related
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| Research Institution | The University of Tokyo (2021)
Kyoto University (2019-2020) |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | フォトトロピン |
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| Outline of Final Research Achievements |
To know how a phototropin (phot), a green-plant-specific blue-light photoreceptor, regulates blue-light responses at the cellular, tissue, and organ levels (i.e., chloroplast movement, phototropism, and leaf flattening), I analyzed two phototropin-interacting proteins, ROOT PHOTOTROPISM 2 (RPT2) and NRL PROTEIN FOR CHLOROPLAST MOVEMENT 1 (NCH1). Although RPT2 and NCH1 are highly similar, RPT2 mediates chloroplast movement, phototropism, and leaf flattening whereas NCH1 is specific to chloroplast movement. So, I examined the difference in the domains and the phosphorylation status between RPT2 and NCH1. Furthermore, I analyzed RPT2 and NCH1 complexes to reveal the mechanism underlying a phototropin signaling pathway.
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| Free Research Field |
植物分子生理学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究は光合成に必要な光の利用効率を最適化する現象である光屈性、葉の平滑化、葉緑体運動を制御する青色光受容体フォトトロピンの信号伝達系を明らかにすることにより、弱光環境下でも効率よく光を利用し最大限光合成を行いバイオマスを増進できる植物の作出に関する応用研究に役立つことが期待される。
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