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《ACTA PHYTOECOLOGICA SINICA》 1995-02
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EFECT OF Na_2SO_4 STRESS ON MEMBRANE-LIPID PEROXIDATION AND SCAVENGING SYSTEM OF ACTIVATED OXYGEN IN FOUR GRASSES WITH DIFFERENT SALT RESISTANCE

Gao Hui-yuan; Li Wei-jun; He Yong-ge; Shang Xin-gang(Xinjiang August 1st Agricultural College, Wulumuqi 830052)  
Exposed to high concentrations of Na_2SO_4(1%and 2%),the permeability of plasma membrane and membrane-lipid peoxidation of Seriphidium schrenki-anum, Artemisia ratifolia,Festuca arundinacea and Dactylis glomerata were increased.But the increases in the permeability of plasma membrane and the membrane-lipid peroxidation were more prominent in salt-resistant species,Seriphidium schrenkianum and Festuca arundinacea,than the salt-sensitive spe-cies, Artemisia ratifolia and Dactylis glomerata. The activities of the supero-xide dismutase(SOD)and catalase(CAT)in the graminaceous family (F.arundinacea and D. glomerata) increased with increasing concentration of Na_2SO_4,while those in the composite family(S. schrenkianum and A. ratifo-lia) decreased.In the graminaceous family, the rate of increase of SOD and CAT activities in the salt-resistant grass(F. arundinacea)was higher than that in the salt-sensitive grass(D. glomerata),while in the composite family,the rate of decrease of SOD and CAT activities was lower in the salt-resistant grass(S.schrenkianum) than that in the salt-sensitive species(A,ratifolia).Within the same family, the relative contents of carotene in the salt-resistant grasses were higher than those in the salt-sensitive grasses.
【Fund】: 国家自然科学基金
【CateGory Index】: Q948.1
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