Elucidation of molecular mechanisms underlying the growth suppression of rice plants at elevated CO2 concentrations and development of techniques for releasing the suppression

2017 Fiscal Year Final Research Report

• Project/Area Number: 15H04470
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Plant nutrition/Soil science
• Research Institution: Tohoku University
• Principal Investigator: TOKUTOMI Mitsue (宮尾光恵) 東北大学, 農学研究科, 教授 (70181980)
• Research Collaborator: KIM Yonghyun 東北大学, 大学院農学研究科, 研究支援者 ; INOUE Masae (今野 雅恵) 名古屋工業大学, 大学院工学研究科, 博士研究員 (60459732)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 高CO2環境 / 葉の発達段階 / C/Nバランス / イネ

Outline of Final Research Achievements

The elevated CO2 concentrations in the atmosphere are transmitted from leaves exposed to elevated CO2 to other organs via a long-distance signal. To identify the signal and the signal-transduction system, transcriptomes of the signal sender (fully developed leaves; P6 stage when P0 represents the stage of leaf primordium initiation) and the signal recipient (developing leaves at the P4 stage) were compared. Results suggest some candidate molecules for the signal, namely, a low-molecular-weight protein and some miRNA species. From the effects of sugar feeding to fully developed leaves, it was found that sugars synthesized in leaves exposed to elevated CO2 could not be the signal but acted as carbon nutrients required for responses to elevated CO2.

Free Research Field

植物生理学　植物生化学