Intraspecific variation in temperature dependency of photoprotective mechanisms

• Project/Area Number: 16K18614
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Ecology/Environment
• Research Institution: Tohoku University
• Principal Investigator: Oguchi Riichi 東北大学, 生命科学研究科, 助教 (10632250)
• Project Period (FY): 2016-04-01 – 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: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
• Keywords: 種内変異 / 温度依存性 / 可塑性 / 適応 / 分化 / 生態学 / 光合成 / 光阻害 / 光保護 / 光化学系II

Outline of Final Research Achievements

Intraspecific variation of repair capacity of damaged photosystem was studied using Arabidopsis thaliana ecotypes derived from all over the world with various latitude and altitude. The repair capacity of damaged photosystem in low temperature showed a significant negative correlation with the average temperature of the habitat of each ecotype. This would indicate that A. thaliana populations facing higher photoinhibition stress caused by lower temperature showed adaptation to keep repair capacity of damaged photosystem high even in low temperature.

Research Products

• [Presentation] 光合成光阻害回避能力における緯度間・標高間種内変異 (2018)
  • Author(s): 小口 理一、Bender, Lukas
  • Organizer: 第６５回日本生態学会大会
• [Presentation] A variation of elevated CO2 response among Arabidopsis thaliana ecotypes derived from a variety of habitats (2017)
  • Author(s): 小口理一、尾崎洋史、花田耕介、彦坂幸毅
  • Organizer: 第６４回日本生態学会大会
  • Place of Presentation: 早稲田大学（東京都新宿区）
  • Year and Date: 2017-03-14
• [Presentation] ハクサンハタザオの局所適応解析：機能遺伝子の観点から (2017)
  • Author(s): 吉田直史、鳥居怜平、小口理一、藤井伸治、久保田渉誠、森長真一、花田耕介、彦坂幸毅
  • Organizer: 第７回東北植物学会大会
• [Presentation] 光環境変化に対する落葉樹実生の光合成・成長可塑性と林床生存率とのトレードオフ (2017)
  • Author(s): 小口理一、日浦勉、彦坂幸毅
  • Organizer: 第７回東北植物学会大会
• [Presentation] 一塩基多型情報を用いた侵入種の緯度に沿った遺伝的背景の解析 (2016)
  • Author(s): 尾崎洋史、小口理一、上林真実、森長真一、彦坂幸毅
  • Organizer: 第８０回日本植物学会大会
  • Place of Presentation: 沖繩コンベンションセンター（沖縄県宜野湾市）
  • Year and Date: 2016-09-16
• [Presentation] Causes of errors in the estimation of photosynthetic activity of higher plant leaves using conventional chlorophyll fluorometers (2016)
  • Author(s): Riichi Oguchi
  • Organizer: The 17th International Congress on Photosynthesis
  • Place of Presentation: Maastricht (The Netherlands)
  • Year and Date: 2016-08-07
  • Int'l Joint Research
• [Remarks] 光阻害のメカニズムと光合成光順化との関係
  • URL: http://hostgk3.biology.tohoku.ac.jp/oguchi/photoinactivation.html