2022 Fiscal Year Final Research Report
Studies on regulations of DNA methylation on transgenerational memory induced by heat stress during grain filling in rice
| Project/Area Number |
21K20584
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Multi-year Fund |
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| Review Section |
0602:Agricultural and environmental biology and related fields
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| Research Institution | Kyushu University |
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Principal Investigator |
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| Project Period (FY) |
2021-08-30 – 2023-03-31
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| Keywords | Rice / Heat stress / Yield / Quality / Gene expression / Grain filling |
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| Outline of Final Research Achievements |
We have elucidated the effects of heat stress exposed at different grain developmental stages in rice on yield and quality. It was shown that heat stress during the early phase of grain filling plays important role to reduce grain yield and quality compared to the later phase, which showed almost no reduction. In all, we proposed that exposure to heat stress at different stages during grain filling resulted in different traits at harvest, which is expected to be regulated differently via epigenetic regulation. In our next study, we aim to elucidate the roles of epigenetic regulations of each grain filling stage under heat and the effects on the next generation.
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| Free Research Field |
Crop science
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| Academic Significance and Societal Importance of the Research Achievements |
We have shown that heat stress during early phase of grain filling had more negative effects on grain yield and quality compared to that of the later phase. Elucidation of this mechanism could help to increase rice yield and quality under heat stress condition.
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