Elucidation of a novel mechanism to reduce photorespiration and the application to improvement of crop photosynthesis

• Project/Area Number: 15K14638
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Crop production science
• Research Institution: Kyushu University
• Principal Investigator: Ueno Osamu 九州大学, 農学研究院, 教授 (70414886)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
• Keywords: C3植物 / C3-C4中間植物 / 光呼吸 / 光合成 / proto-Kranz植物 / アカザ属 / 葉構造 / ミトコンドリア / グリシンデカルボキシラーゼ / CO2補償点 / 二酸化炭素補償点

Outline of Final Research Achievements

This study investigated photosynthetic and photorespiratory traits in the genus Chenopodium (Chenopodiaceae). It was found that this genus includes proto-Kranz and C3-C4 intermediate types as well as C3 type. It is noteworthy that C. album shows a great variation in the photosynthetic type depending on locality. In addition, the expression of photosynthetic and photorespiratory traits in C. album was influenced by environmental factors such as growth temperature and soil nitrogen level. It is suggested that the mechanism to reduce photorespiration in Chenopodium represents an initial stage to the evolution of C4 plants.

Research Products

• [Journal Article] Intracellular position of mitochondria in mesophyll cells differs between C3 and C4 grasses. (2017)
  • Author(s): Hatakeyama, Y. and Ueno, O.
  • Journal Title: Journal of Plant Research Volume: 130
  • NAID: 130006954294
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Intracellular position of mitochondria and chloroplasts in bundle sheath and mesophyll cells of C3 grasses in relation to photorespiratory CO2 loss. (2016)
  • Author(s): Hatakeyama, Y. and Ueno, O.
  • Journal Title: Plant Production Science Volume: 19 Issue: 4 Pages: 549-551
  • DOI: 10.1080/1343943x.2016.1212667
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Presentation] アカザ属におけるC3型からC3-C4中間型の進化の間に葉構造と光合成機能はどのように変化したのか. (2018)
  • Author(s): 依光由記, 上野修
  • Organizer: 日本作物学会第245回講演会
• [Presentation] アカザ属 (Chenopodium) における光合成・光呼吸特性の種間および種内変異 (2017)
  • Author(s): 依光由記, 畠山友翔, 屋比久貴之, 上野修
  • Organizer: 日本作物学会第243回講演会
  • Place of Presentation: 東京大学農学部
  • Year and Date: 2017-03-29
• [Presentation] 高温と低窒素土壌環境はシロザにおけるC3-C4中間光合成特性の発現を促進する (2017)
  • Author(s): 大野じぇみん, 畠山友翔, 屋比久貴之, 上野修
  • Organizer: 日本作物学会第243回講演会
  • Place of Presentation: 東京大学農学部
  • Year and Date: 2017-03-29
• [Presentation] Variation in photosynthetic and photorespiratory characteristics in the genus Chenopodium (Chenopodeaceae) (2016)
  • Author(s): Yorimitsu Y, Hatakeyama Y, Yabiku T, Ueno O
  • Organizer: The 13th International Joint Symposium between Korea and Japan, Agricultural, Food, Environmental and Life Sciences in Asia, 2016
  • Place of Presentation: Hotel Interciti, Korea
  • Year and Date: 2016-11-09
  • Int'l Joint Research
• [Presentation] 葉肉細胞におけるミトコンドリアの細胞内配置はC3植物とC4植物で異なる (2016)
  • Author(s): 畠山友翔, 上野修
  • Organizer: 日本作物学会第242回講演会
  • Place of Presentation: 龍谷大学
  • Year and Date: 2016-09-10
• [Presentation] シロザの維管束鞘細胞におけるミトコンドリアと光呼吸酵素の集中 (2016)
  • Author(s): 上野修・門園彩・畠山友翔・屋比久貴之・永井あかね
  • Organizer: 日本作物学会第241回講演会
  • Place of Presentation: 茨城大学
  • Year and Date: 2016-03-28
• [Presentation] イネ科C3植物葉におけるミトコンドリア細胞内配置の電子顕微鏡観察―光呼吸によるCO2ロスとの関連から (2015)
  • Author(s): 畠山友翔・上野修
  • Organizer: 日本作物学会第240回講演会
  • Place of Presentation: 信州大学
  • Year and Date: 2015-09-05