The Effects of Water Stress on Photosystem Ⅱ in Wheat

Abstract

Abstract: The fluorescence yield at room temperature, the capacity of excitation energy distribution between photosystem Ⅰ and Ⅱ by Mg2+, variable fluorescence yield, variable fluorescence quenching rate and fluorescence complementary area were decreased under water stress. These indicated that photosystem Il was impaired. The inhibited variable fluorescence yield could be partly recovered by the addition of artificial electron donor DPC. Therefore, water stress inhibited not only the oxidizing site of photosystem Ⅱ but also impaired partly the reaction center of photosystem Ⅱ.

Key words: Wheat, Water stress, Photosystem Ⅱ, Damage site

Lu Cong-ming, Zhang Qi-de and Kuang Ting-yun. The Effects of Water Stress on Photosystem Ⅱ in Wheat[J]. J Integr Plant Biol., 1994, 36(2): -.

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The Effects of Water Stress on Photosystem Ⅱ in Wheat

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