2022 Fiscal Year Final Research Report
Functional analysis on the role of root-associated microbiota on plant growth under alkaline condition
| Project/Area Number |
20K05955
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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 38060:Applied molecular and cellular biology-related
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| Research Institution | Shizuoka University (2022)
The University of Tokyo (2020-2021) |
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Principal Investigator |
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | 根圏マイクロバイオータ / アルカリ土壌 / 鉄欠乏 / クマリン |
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| Outline of Final Research Achievements |
It is known that about 30% of the land surface on the earth is alkaline soil, where the combined stresses including limited bioavailability of iron significantly inhibit plant growth. The plant root is colonized by a diverse community of microbes called the root microbiota, which is believed to improve plant nutrient uptake and tolerance to abiotic stresses. This study aimed to elucidate the mechanism how the root microbiota contributes to plant growth in alkaline soil. We found that coumarins, secondary metabolites secreted from plant roots, are involved in the root microbiota community assembly in alkaline soil, and that these compounds play important roles for the root microbiota to promote plant iron uptake under iron-limiting conditions.
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| Free Research Field |
植物微生物相互作用
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| Academic Significance and Societal Importance of the Research Achievements |
植物の鉄吸収メカニズムについてはこれまで多くの研究がなされ、関与する植物タンパク質やその働きが明らかにされてきた。しかし、植物の鉄吸収における根圏マイクロバイオータの役割についてはこれまで注目されていなかった。研究代表者らは、根圏マイクロバイオータの人工的再構成系を用いることで、根圏マイクロバイオータが鉄欠乏条件下で植物の鉄吸収を促進する働きを持つことを示した。また、その微生物群集の機能には、植物の根から分泌されるクマリン類が重要な役割を担うことを示唆する結果を得た。
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