2014 Fiscal Year Final Research Report
Molecular mechanism of the plant survival strategy of plants to drought stress
| Project Area | Integrated analysis of strategies for plant survival and growth in response to global environmental changes |
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| Project/Area Number |
22119004
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| Research Category |
Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
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| Allocation Type | Single-year Grants |
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| Review Section |
Biological Sciences
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
MIZOI Junya 東京大学, 大学院農学生命科学研究科, 講師 (20469753)
KIDOKORO Satoshi 東京大学, 大学院農学生命科学研究科, 助教 (70588368)
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| Project Period (FY) |
2010-04-01 – 2015-03-31
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| Keywords | 植物 / シロイヌナズナ / 乾燥ストレス応答 / 高温ストレス応答 / 遺伝子発現制御 / 転写因子 / 転写制御ネットワーク / 翻訳後調節 |
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| Outline of Final Research Achievements |
To elucidate molecular mechanism of plant drought and heat responses mediated by a transcription factor, DREB2A, we analyzed regulation of DREB2A gene expression under drought and heat stress conditions in Arabidopsis. We found that HsfA1-type transcription factors regulate the expression of this gene under heat stress and AREB-type transcription factors under drought stress conditions. Moreover, we identified GRF7 as a transcriptional repressor under control conditions. On the other hand, we also revealed that the stabilization of the DREB2A protein was important for its activation as post-translational regulation. Finally, we identified an Arabidopsis DPB3 homolog, DPB3-1, which interacts with DREB2A and found that DPB3-1 enhances heat stress-inducible gene expression during heat stress responses in cooperation with DREB2A.
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| Free Research Field |
植物の環境ストレス応答と耐性獲得の分子生理学
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