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Changes in composition and function of thylakoid membrane isolated from barley seedling leaves under salt stress

Diao Fengqiu, Zhang Wenhua, Liu Youliang

Department of Agronomy, Nanjing Agricultural University. Nanjing 210095, Jiangsu

Abstract

Apparent photosynthesis in barley leaves decreased at the beginning of salt stress and recovered partialy after 4　d. The contents of thylakoidmembrane protein, Chl aand Chl b, the Chl a/Chl b ratio decreased　under salt stress. The ratios of phospholipid/protein, galactose in　lipids/protein and phospholipid/galactose in lipids decreased. The fatty　acid compositions in thylakoid membrane changed under salt stress. Because the　content of linolenic acid increased and the others with lower degree of　unsaturation decreased, the USFA/SFA and IUFA of salt stress increased.The activity of H~(+)-ATPase in thylakoid membrane was higher at the beginning,and then became lower, and the Hill-reaction activity was higher than　the control under salt stress.

Key words: Salt stress;Barley;Membrane;Lipid;H~(+)-ATPase;Hill-reaction

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Citing This Article：

Diao Fengqiu, Zhang Wenhua, Liu Youliang. Changes in composition and function of thylakoid membrane isolated from barley seedling leaves under salt stress. Acta Physiol Sin 1997; 49 (2): (in Chinese with English abstract).