2020 Fiscal Year Final Research Report

Climate responsiveness of annual ring formation of Ginkgo biloba for wide monitoring to global warming

Research Project

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Project/Area Number	17K19299
Research Category	Grant-in-Aid for Challenging Research (Exploratory)
Allocation Type	Multi-year Fund
Research Field	Forestry and Forest Products Science, Applied aquatic science, and related fields
Research Institution	Akita Prefectural University
Principal Investigator	Takata Katsuhiko 秋田県立大学, 木材高度加工研究所, 教授 (50264099)
Co-Investigator(Kenkyū-buntansha)	安江恒信州大学, 学術研究院農学系, 准教授 (00324236) 雉子谷佳男宮崎大学, 農学部, 教授 (10295199) 船田良東京農工大学, (連合)農学研究科(研究院), 教授 (20192734) 高部圭司京都大学, 農学研究科, 教授 (70183449) 佐野雄三北海道大学, 農学研究院, 教授 (90226043) 工藤佳世秋田県立大学, 木材高度加工研究所, 助教 (10757983)
Project Period (FY)	2017-06-30 – 2021-03-31
Keywords	イチョウ / 形成層活動 / 木材組織構造
Outline of Final Research Achievements	The following new findings were obtained regarding the cambium activity and wood structures of Ginkgo biloba. (1) There will be cells peculiar to Ginkgo biloba that do not have pits and do not contribute to water flow. (2) The water flow pattern of ginkgo would be different from these of general conifers and broad-leaved trees. (3) It takes more than one month from the resumption of cambium activity to the completion of the first tracheid differentiation of the year and the increase in cell division frequency. These characteristics are commonly recognized in different habitats (Akita prefecture, Miyazaki prefecture, Hokkaido, Tokyo), and are considered to be the unique and tree-specific characteristics of Ginkgo biloba.
Free Research Field	森林資源学
Academic Significance and Societal Importance of the Research Achievements	本研究の実施により、イチョウの形成層活動の特異性が明らかになった。この結果は、本研究の目的であるイチョウを利用した地球温暖化広域モニタリングの可能性を示唆するものと考えられる。また、これらの知見をもとに木本植物を対象とした進化と環境適応性に関する新たな研究が立ち上がるなど、今後の研究の進展が期待される。