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2014 Fiscal Year Final Research Report

Molecular mechanism of the plant survival strategy of plants to drought stress

Planned Research

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Project AreaIntegrated analysis of strategies for plant survival and growth in response to global environmental changes
Project/Area Number 22119004
Research Category

Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

Allocation TypeSingle-year Grants
Review Section Biological Sciences
Research InstitutionThe University of Tokyo

Principal Investigator

YAMAGUCHI-SHINOZAKI Kazuko  東京大学, 農学生命科学研究科, 教授 (30221295)

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)
Project Period (FY) 2010-04-01 – 2015-03-31
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
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.

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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Published: 2016-06-03  

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