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

2017 Fiscal Year Final Research Report

• 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
• 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

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.

Free Research Field

植物生産生理学