2023 Fiscal Year Final Research Report
Investigation of non-canonical strigolactone biosynthesis in rice
| Project/Area Number |
19H02892
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Basic Section 38040:Bioorganic chemistry-related
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2024-03-31
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| Keywords | 植物ホルモン / ストリゴラクトン / 生合成 / イネ |
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| Outline of Final Research Achievements |
The carotenoid-derived strigolactones (SLs) are a class of plant hormones that regulate various developmental processes such as shoot branching and senescence. They also have multiple roles as allelochemicals against arbuscular mycorrhizal fungi and root parasitic plants in the rhizosphere. Natural SLs are structurally divided into canonical SLs and non-canonical SLs with tetracyclic and non-tetracyclic structures, respectively.
It has been reported that canonical SLs, such as 4-deoxyorobanchol and orobanchol, are biosynthesized in rice. In this study, we identified a cytochrome P450 monooxygenase that plays an important role in the production of non-canonical SLs in rice.
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| Free Research Field |
植物生化学
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| Academic Significance and Societal Importance of the Research Achievements |
農業上の主要作物である栽培イネ（ジャポニカ亜種）において、新規なストリゴラクトン生合成酵素を発見するとともに、本酵素がこれまで不明だった非四環性ストリゴラクトンの生合成に重要な役割を果たすことを明らかにした。
本成果を契機に、イネをモデル植物として四環性と非四環性の各ストリゴラクトン分子種の根圏アレロケミカルや植物ホルモンとしての生理的役割の解明が進むと考えられる。また、他の植物種における本酵素ホモログの解析を行うことで、新たな非四環性ストリゴラクトンが明らかになる可能性がある。
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