Investigation of interspecific differences in regulatory mechanism of photosynthesis by spectroscopic imaging and microclimate analysis

2019 Fiscal Year Final Research Report

• Project/Area Number: 17K15192
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Ecology/Environment
• Research Institution: Nagoya University
• Principal Investigator: Sugiura Daisuke 名古屋大学, 生命農学研究科, 助教 (50713913)
• Project Period (FY): 2017-04-01 – 2020-03-31
• Keywords: 微気象 / 光合成 / イネ / 葉面積指数 / 近赤外光 / 光合成有効放射

Outline of Final Research Achievements

This study aimed at elucidating responses of photosynthetic characteristics and canopy growth to micro-climate and their interspecific or intercultivar differences in crops. Physiological mechanisms of down-regulation of photosynthesis responding to non-structural carbohydrates in soybean and French bean were closely examined. We also developed a technique to estimate rice canopy growth non-destructively by measuring near infra-red radiation (NIR) and photosynthetically active radiation (PAR) inside and outside rice canopy. This technique allowed us to trace seasonal dynamics of canopy growth from transplanting to maturity stage and to evaluate varietal and regional differences in the canopy growth characteristics.

Free Research Field

植物i生理生態学

Academic Significance and Societal Importance of the Research Achievements

植物の物質生産の基盤である光合成の調節機構の生理メカニズムや種間差、群落レベルの成長量の非破壊測定法を確立できたことで、野外環境における微気象が植物の光合成や成長に与える影響を容易に評価できるようになった。これらの研究成果は、将来環境において、大気CO2濃度の上昇や温暖化が作物の生産性に与える影響を予測することに役立つことが期待される。