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首页> 中文期刊> 《农业科学学报（英文版）》 >In situ measurements of winter wheat diurnal changes in photosynthesis and environmental factors reveal new insight into photosynthesis improvement by super-high-yield cultivation

In situ measurements of winter wheat diurnal changes in photosynthesis and environmental factors reveal new insight into photosynthesis improvement by super-high-yield cultivation

         
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摘要

In past 30 years, the wheat yield per unit area of China has increased by 79%. The super-high-yield(SH) cultivation played an important role in improving the wheat photosynthesis and yield. In order to find the ecophysiological mechanism underneath the high photosynthesis of SH cultivation, in situ diurnal changes in the photosynthetic gas exchange and chlorophyll(Chl) a fluorescence of field-grown wheat plants during the grain-filling stage and environmental factors were investigated. During the late grain-filling stage at 24 days after anthesis(DAA), the diurnal changes in net CO_(2) assimilation rate were higher under SH treatment than under high-yield(H) treatment. From 8 to 24 DAA, the actual quantum yield of photosystem II(PSII) electron transport in the light-adapted state(ΦPSII) in the flag leaves at noon under SH treatment were significantly higher than those under H treatment. The leaf temperature, soil temperature and soil moisture were better suited for higher rates of leaf photosynthesis under SH treatment than those under H treatment at noon. Such diurnal changes in environmental factors in wheat fields could be one of the mechanisms for the higher biomass and yield under SH cultivation than those under H cultivation. ΦPSII and CO_(2) exchange rate in wheat flag leaves under SH and H treatments had a linear correlation which could provide new insight to evaluate the wheat photosynthesis performance under different conditions.

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  • 来源
    《农业科学学报（英文版）》 |2021年第2期|527-539|共13页
  • 作者

    MA Ming-yang; LIU Yang; ZHANG Yao-wen; QIN Wei-long; WANG Zhi-min; ZHANG Ying-hua; LU Cong-ming; LU Qing-tao;

  • 作者单位

    Key Laboratory of Photobiology Institute of Botany Chinese Academy of Sciences Beijing 100093 P.R.China;

    State Key Laboratory of Crop Biology Ministry of Science and Technology/College of Life Sciences Shandong Agricultural University Tai'an 271018 P.R.China;

    College of Agronomy and Biotechnology China Agricultural University Beijing 100193 P.R.China;

    Hybrid Rapeseed Research Center of Shaanxi Province/Shaanxi Rapeseed Branch of National Oil Crops Genetic Improvement Center Yangling 712100 P.R.China;

    College of Agronomy and Biotechnology China Agricultural University Beijing 100193 P.R.China;

    College of Agronomy and Biotechnology China Agricultural University Beijing 100193 P.R.China;

    College of Agronomy and Biotechnology China Agricultural University Beijing 100193 P.R.China;

    State Key Laboratory of Crop Biology Ministry of Science and Technology/College of Life Sciences Shandong Agricultural University Tai'an 271018 P.R.China;

    Key Laboratory of Photobiology Institute of Botany Chinese Academy of Sciences Beijing 100093 P.R.China;

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