The 10th Asian Crop Science Association Conference

講演情報

Poster Session

Abiotic Stress for Crop Production » P3: Poster Session

[P3] Abiotic Stress for Crop Production

2021年9月9日(木) 12:15 〜 14:00 Room 3 (Poster) (Abiotic Stress for Crop Production)

12:15 〜 13:00

[P3-37] Contrasting Rice Cultivars Responses to Increasing CO2 Levels and Temperature

*Nominated for Presentation Awards

Nene Furukawa1, Murat Aycan2, Nahar Lutfun1, Toshihiro Nagamori1, Eckart Priesack3, Bertrand Gakière4, José Luis Araus5, Iker Aranjuelo6, Marouane Baslam2, Toshiaki Mitsui1,2 (1.Dept. of Life and Food Sciences, Graduate School of Science and Technology, Niigata University, Japan, 2.Laboratory of Biochemistry, Faculty of Agriculture, Niigata University, Japan, 3.Institute of Biochemical Plant Pathology, Helmholtz Center-Munich, Germany, 4.Institute of Plant Sciences Paris-Saclay (IPS2), CNRS University Paris-Saclay, France, 5.Integrative Crop Ecophysiology group, University of Barcelona, Spain, 6.Agrobiotechnology Institute, Spanish National Research Council, Spain)

The changing global climate is a major threat to rice production. We aim to identify rice crop cultivars management practices conferring high nutrient use efficiency to ensure sustainable agricultural and biomass production adapted to the predicted climate change scenarios. To characterize the crops with higher/lower yield and grain quality characteristics, we investigated the agronomical, physiological, and biochemical response patterns in 10 rice cultivars (selected based on their tolerance/susceptibility under a previous drought field experiment) grown under three conditions of control (CT), high-temperature (HT), and combination of high-temperature + elevated CO2 (HT+ECO2). The metric measurements and correlation analyses among the studied traits allowed to systematically break down the divergent behavioral phenotypes of rice genotypes under stressful environment. As a result, the seed-set and yield were reduced while chalkiness increased by high tissue temperature. ECO2 increases some physiological traits, spikelet, and seed number, while it decreased the grain traits, and can compensate to some extent the temperature, but the HT+ECO2 undermines the grain characteristics and quality traits.