Metabolite dynamics among different organs in crop under heterogeneous water environment

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K05997
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 39020:Crop production science-related
• Research Institution: Nagoya University
• Principal Investigator: Kano-Nakata Mana 名古屋大学, 農学国際教育研究センター, 助教 (70623958)
• Co-Investigator(Kenkyū-buntansha): 若山 正隆 愛媛大学, 医学系研究科, 講師 (20721913)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 水ストレス / イネ / メタボローム解析 / 根 / フェノタイピング / 水分変動

Outline of Final Research Achievements

Water stress is one of the major constraints to crop production and roots are the first organs detecting the water stress and showing morphological changes. Since root system development is closely related to the sugar metabolism, we focused on metabolite dynamics among different organs in crop plants. The objective of this study was to identify metabolites and root phenotypes which associated with plant adaptation to water stress focusing on moisture fluctuations in rice. Metabolome analysis revealed that genotypic variation was observed in metabolite recovery (such as Glu, Gln, Asp and Asn) during re-watering after drought, which was associated with lateral root development. In addition, non-destructive phenotyping system was constructed to monitor the root system development under moisture fluctuation conditions.

Free Research Field

作物生産科学

Academic Significance and Societal Importance of the Research Achievements

作物の水ストレス適応性向上に関連する代謝産物や表現型の同定により、それらを水ストレス適応性指標として同ストレス条件下の収量向上に貢献できる。とくに本研究で抽出された代謝産物や表現型、それらの評価システムは、水ストレスとして焦点を当てた水分変動が頻繁に起こっていると想定される、天水栽培（灌漑設備が整っておらず自然の降雨に依存して栽培）や節水栽培に適したイネの選抜や育種にも応用することができると考えられる。