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《ACTA PHYTOECOLOGICA SINICA》 2000-03
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EFFECTS OF CO_2 DOUBLING ON SOME PHOTOSYNTHETIC FUNCTIONS OF SPRING WHEAT UNDER SALT STRESS

ZHANG Qi De WEN Xiao Gang LU Cong Ming FENG Li Jie and KUANG Ting Yun (Institute of Botany, the Chinese Academy of Sciences, Beijing 100093) ZHANG Jian Hua (Department of Biology, Hong Kong Baptist University, Kowloon Tong, Hong Kong)  
Effects of doubled CO 2 on the content of photosynthetic pigments and some photosynthetic functions of spring wheat under salt stress were studied. Chlorophyll and carotenoid content per unit fresh weight of leaves and the capacity of light energy absorption of chloroplasts containing equal chlorophyll were reduced by salt stress, as were the fluorescence quenching rate (ΔFv/T) and the capacity of excitation energy distribution between PS Ⅱ and PS Ⅰ regulated Mg 2+ . However, these parameters all increased in the presence of doubled CO 2. The results indicated that the unfavourable effects of salt stress on photosynthetic functions could be alleviated by high CO 2 concentration.
【Fund】: 中国科学院“九·五”特别支持项目;; 国家重点基础研究发展规划项目!( G19980 10 10 0 )资助
【CateGory Index】: Q945
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