镉胁迫下龙葵叶中三种抗氧化酶的活性和抗坏血酸含量的变化  

Variations of Three Antioxidant Enzymes Activities and AsA Content in Leaves of Solanum nigrum L.under Cadmium Stress

作　　者：唐秀梅[1,2] 龚春风[1] 刘鹏[1] 徐根娣[1] 蔡妙珍[1] 吴琼鸯[1] 

机构地区：[1]浙江师范大学植物学实验室,浙江金华321004 [2]广西大学农学院,南宁530004

出　　处：《植物生理学通讯》2008年第6期1135-1136,共2页Plant Physiology Communications

基　　金：国家自然科学基金(30540056);浙江省自然科学基金(306391)。

摘　　要：水培龙葵,设置0、10、25、50、100 mg·L^(-1)5个镉浓度,处理17和34 d后测定叶片中3个保护酶活性和抗坏血酸含量。结果表明,经镉处理后的过氧化物酶(POD)、超氧化物歧化酶(SOD)、过氧化氢酶(CAT)活性和抗坏血酸(AsA)含量都增加,25、100 mg·L^(-1)镉处理的差异显著;处理34 d后,3个酶的活性呈现随着镉浓度升高而变化的规律,三者都表现出先升高后降低再升高的趋势。In this research, the AsA content and three antioxidant enzymes activities of Solanum nigrum were studied after 17 and 34 days of treatment with Cd （0, 10, 25, 50, 100 mg·L^-1） in hydroponic culture. Compared to control, the activities of POD, SOD, CAT and AsA content increased with Cd treatment and changed significantly with 25 and 100 mg·L^-1Cd. After 34 days with Cd treatment, the activities of POD, SOD and CAT changed with the increase concentration of Cd^2＋. And the activities rised first, decreased later, and then increased again.

关 键 词：镉 龙葵 抗坏血酸 抗氧化保护酶 

分 类 号：X173[环境科学与工程—环境科学]