Effect of Chlorophyll-deficient on PSⅡand Distribution Properties of Absorbed Light Energy in Leaves of Soybean
The chlorophyll contents, gas exchange and chlorophyll fluorescence kinetics were extensively studied in chlorophyll-deficient mutant soybean leaves and its wild-type from emergency to full expansion under field conditions. The difference of the absorbed light distribution between two soybean varieties during the development of leaves was also assessed. Results showed that chlorophyll deficient induced a decrease of PS Ⅱ reaction centers, and resulted in an increase of excited energy capture per active reaction centers. It also showed that PS Ⅱ electron transport was blocked apparently, and the energy dissipation increased per PSⅡ reaction centers. Compared with wild-type soybean, the mutant had less excitation energy and the fraction of absorbed light allocated to energy dissipation. Furthermore, with the deficiency of the chlorophyll content allocation of photosynthetic electron transport to photorespiration was enhanced.
SoybeanChlorophyll - deficientMutantPSⅡ reaction centersDistribution of light energy
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万方数据
维普
