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Effects of enhanced UV-B radiation on properties of microsomal membrane of broad bean leaves

Tang Xudong, An Lizhe, Wang Xunling

Department of Biology,Lanzhou University.Lanzhou 730000,Gansu

Abstract

The properties of microsomal membrane of broad bean (Vicia faba L.) leaves exposed to UV-B radiation (Control: 0 kJ m~(-1) d~(-1); T1: 8.65 kJ m~(-1) d~(-1); T2: 11.2 kJ m~(-1) d~(-1)) were studied under green-hourse conditions. The activities of Ca~(2+)-ATPase and Mg~(2+)-ATPase decreased during the treatment and after 21 days of UV-B radiation the content of MDA was higher than the control and increased by 68.7% in T1 and 71.5% in T2 respectively. Meanwhile, IUFA decreased drastically, and was consisted with the strength of the UV-B dosages, indicating that lipid peroxidation occurred. The total phospholipid content was higher on the 7th day under T1 and T2 treatments but were lower on the 14th day and the 21th day. The activity of lipoxygenase was higher on the 7th and the 14th day and were much lower on the 21th day than the control.

Key words: UV-B (280-320 nm);Vicia faba L.;Microsomal membrane;Membrane damage

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Citing This Article：

Tang Xudong, An Lizhe, Wang Xunling. Effects of enhanced UV-B radiation on properties of microsomal membrane of broad bean leaves. Acta Physiol Sin 1998; 50 (2): (in Chinese with English abstract).