Analyses of molecular mechanisms that mediate osmotic stress perception

• Project/Area Number: 15K18563
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Plant molecular biology/Plant physiology
• Research Institution: Institute of Physical and Chemical Research
• Principal Investigator: Takahashi Fuminori 国立研究開発法人理化学研究所, 環境資源科学研究センター, 研究員 (00462698)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
• Keywords: 環境応答 / 植物ホルモン

Outline of Final Research Achievements

Osmotic stress responses are important mechanisms of early stress perception for adapting abiotic stress conditions including drought stress. One of the protein kinases, SnRK2, is a key phosphorylation enzyme, and activated by osmotic stress conditions. This activation leads to the accumulation of one of the important phytohormone, abscisic acid (ABA), and the acquisition of stress resistance in planta. However, there remain unclear the perception mechanism of osmotic stress conditions. In this study, we focused on one of the small peptides mediating the activation of SnRK2 protein kinase. We analyzed the perception mechanisms of early osmotic stress conditions. Especially we elucidated the peptide signaling mediating cell-to-cell communications in response to early osmotic stress responses.

Research Products

• [Journal Article] A small peptide modulates stomatal control via abscisic acid in long-distance signalling (2018)
  • Author(s): Takahashi F, Suzuki T, Osakabe Y, Betsuyaku S, Kondo Y, Dohmae N, Fukuda H, Yamaguchi-Shinozaki K, Shinozaki K.
  • Journal Title: Nature Volume: 556 Issue: 7700 Pages: 235-238
  • DOI: 10.1038/s41586-018-0009-2
  • Peer Reviewed / Open Access
• [Journal Article] Overexpression of an Arabidopsis thaliana galactinol synthase gene improves drought tolerance in transgenic rice and increased grain yield in the field. (2017)
  • Author(s): Selvaraj MG, Ishizaki T, Valencia M, Ogawa S, Dedicova B, Ogata T, Yoshiwara K, Maruyama K, Kusano M, Saito K, Takahashi F, Shinozaki K, Nakashima K, Ishitani M.
  • Journal Title: Plant Biotechnology Journal Volume: 印刷中 Issue: 11 Pages: 1465-1477
  • DOI: 10.1111/pbi.12731
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Presentation] 乾燥ストレスにおける気孔の応答に関わるペプチドの解析 (2018)
  • Author(s): 高橋史憲、鈴木 健裕、刑部 祐里子、別役 重之、堂前 直、福田 裕穂、篠崎 和子、篠崎 一雄
  • Organizer: 第59回日本植物生理学会年会（札幌）