J Integr Plant Biol. ›› 1996, Vol. 38 ›› Issue (1): -.

• Research Articles •    

Effect of Elevated CO2 on the Primary Conversion of Light Energy of Alfalfa Photosynthesis

Zhang Qi-de, Lu Cong-ming, Feng Li-jie, Lin Shi-qing, Kuang Ting-yun and Bai Ke-zhi   

Abstract: In studying the mechanism of increase in alfalfa (Medicago sativa L. ) photosynthesis under elevated atmospheric CO2, it was found that the capacity of chloroplasts for light absorption was greater, the potential activity and efficiency of primary conversion of light enlergy of PS Ⅱ , quantum yield of PS Ⅱ electron transport, and activation capacity of PS Ⅰ were stimulated, photochemical quenching coefficient was increased and non-photochemical quenching coefficient was decreased under elevated atmospheric CO2.

Key words: Medicago sativa, Elevated CO2, Absorption spectrum, PS Ⅱ functions, Fluorescence quenching

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