Molecular basis of CO2 response in stomatal apparatus

2023 Fiscal Year Final Research Report

• Project/Area Number: 20H03279
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 44030:Plant molecular biology and physiology-related
• Research Institution: Kyushu University
• Principal Investigator: Iba Koh 九州大学, 理学研究院, 名誉教授 (10192501)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 気孔 / CO2

Outline of Final Research Achievements

Focusing on stomatal chloroplast-independent and drought-independent CO2 signalling pathways responsible for higher-order information processing in the stomatal apparatus, we sought to identify novel CO2 signalling and higher-order information processing factors. Proteomic analysis of isolated stomatal chloroplasts identified stomatal chloroplast factors involved in the regulation of stomatal opening and closing. Analysis of the causal gene of a CO2-insensitive mutant revealed that PE, a phospholipid abundant in pore cells, is essential for stomatal opening. Furthermore, thermal imaging mutant screening isolated a mutant with an abnormal ABA-independent stomatal closure response.

Free Research Field

植物生理学

Academic Significance and Societal Importance of the Research Achievements

本研究は、植物における生体情報、環境情報の集積中枢となっている気孔装置における高次情報処理の仕組みを精査することによって、植物の生命力の強さ、すなわち頑健性の源となっている植物に特異的な細胞動態の解明をめざしている。