2023 Fiscal Year Final Research Report

Establishment of an environmental suitability diagnosis method for urban trees: Introduction of stomatal response assessment using aquaporins

Research Project

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Project/Area Number	19H04281
Research Category	Grant-in-Aid for Scientific Research (B)
Allocation Type	Single-year Grants
Section	一般
Review Section	Basic Section 63040:Environmental impact assessment-related
Research Institution	Kyoto Institute of Technology
Principal Investigator	Hanba Yuko, T. (半場祐子) 京都工芸繊維大学, 応用生物学系, 教授 (90314666)
Co-Investigator(Kenkyū-buntansha)	馬場啓一京都大学, 生存圏研究所, 助教 (20238223) 久米篤九州大学, 農学研究院, 教授 (20325492) 奈良久美奈良女子大学, 自然科学系, 准教授 (30322663) 北島佐紀人京都工芸繊維大学, 応用生物学系, 准教授 (70283653)
Project Period (FY)	2019-04-01 – 2023-03-31
Keywords	光合成 / 大気汚染 / 街路樹 / 気孔 / 炭素安定同位体比 / ヒラドツツジ / 交通量 / 窒素酸化物
Outline of Final Research Achievements	Research conducted mainly in Kyoto City has shown that photosynthetic function is reduced in the major urban trees R. pulchrum and P. yedoensis in response to air pollution such as nitrogen oxides, and that biochemical rather than stomatal responses are more strongly related to this reduction in photosynthetic function. The degree of stomatal closure under high humidity was reduced in the Arabidopsis aquaporin AtTIP2;2 mutant, suggesting that the stomatal closure response is inhibited by the loss of AtTIP2;2.
Free Research Field	植物生理生態学
Academic Significance and Societal Importance of the Research Achievements	葉の炭素安定同位体の値を利用して、都市部に植栽されている街路樹の光合成機能の歴史的な変化を日本において初めて明らかにすることができた。また、日本の都市部における大気汚染レベルの顕著な改善が、街路樹の光合成機能向上につながっている、という、環境政策的にも重要な成果を得ることができた。