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Chinese Journal of Applied Ecology ›› 2019, Vol. 30 ›› Issue (11): 3735-3744.doi: 10.13287/j.1001-9332.201911.030

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Effect of different levels of elevated CO2 concentration on leaf chlorophyll fluorescence cha-racteristics of Japonica rice

FAN Pei-pei1, FENG Fang1, LIU Chao1, SUN Wen-juan2, YU Ling-fei2, KE Hao-nan1, CHEN Shu-tao1, HU Zheng-hua1*   

  1. 1Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, School of Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing 210044, China;
    2State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
  • Received:2018-11-12 Online:2019-11-15 Published:2019-11-15
  • Contact: * E-mail: zhhu@nuist.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (41530533, 41775152) and the Jiangsu Province University Student Practice Innovation Project (201810300070Y).

Abstract: To examine the effects of elevated CO2 concentrations on chlorophyll fluorescence of rice leaf, a field experiment was conducted with automatic control system of CO2 concentration in open top-chambers (OTCs). There were three treatments, including atmospheric CO2 concentration (CK), CK+80 μmol·mol-1 CO2 (T1), and CK+200 μmol·mol-1 CO2 (T2). The fast chlorophyll fluorescence induction dynamic curves of flag leaves were measured using the plant efficiency analyzer at the main growth stages of rice. The results showed that T1 treatment significantly increased quantum yield for electron transfer (φEo), maximum photochemical efficiency (Fv/Fm), and performance index (PIABS), but decreased quantum yield for energy dissipation (φDo) at the flowe-ring, milk grain, ripening, and full ripeness stages. The values of φEo, Fv/Fm, and PIABS were increased by 7.3%-23.3%, 3.1%-7.1%, and 46.2%-93.0%, respectively. The φDo values were decreased by 10.3%-20.5%. T2 treatment significantly decreased φEo, Fv/Fm, PIABS by 68.7%, 41.4%, and 93.4%, respectively, but increased φDo by 78.4% at the jointing stage. T2 treatment significantly increased φEo, Fv/Fm, PIABS by 11.6%-19.8%, 4.8%-6.8%, and 53.0%-72.6%, respectively, and decreased φDo by 7.7%-19.4% at the flowering, milk grain, and ripening stages. Our results suggested that elevated CO2 concentration (80, 200 μmol·mol-1) would promote photosynthetic electron transport of PSⅡ in flag leaves of rice.