镉对萌发水稻种胚细胞膜透性和抗氧化酶活性的影响  

Effect of Water Cadmium Pollution on Cell Membrane Permeability and Some Antioxidant Enzyme Activity in Rice Germanating Embryo

作　　者：白嵩[1] 

机构地区：[1]广东省农业科学院水稻研究所,广州510640

出　　处：《吉林农业大学学报》2006年第3期237-239,248,共4页Journal of Jilin Agricultural University

基　　金：国家农业科技跨越计划项目(99-01-02)

摘　　要：采用不同质量浓度（0，0．1，1．0，10．0，100．0mg/L）的Cd^2＋溶液模拟水体镉污染，研究Cd^2＋对水稻种子萌发期间种胚细胞膜完整性和抗氧化酶类活性的影响。试验结果表明：在Cd^2＋胁迫下水稻种胚细胞膜结构遭到不同程度破坏，丙二醛（MDA）含量与电解质外渗率（RELR）随着Cd^2＋胁迫浓度的提高与胁迫时间的延长而增加；抗氧化酶类活性随着Cd^2＋浓度的增加和胁迫时间的延长而增加，超氧化物歧化酶（SOD）活性提高0．10～2．18倍，过氧化物酶（POD）活性提高0．35～2．24倍，过氧化氢酶（CAT）活性提高0．43～2．35倍。This article dealt with the effect of simulative water Cd^2＋ pollution on membrane integrality and the activity of some antioxidant enzymes in dee embryo. The seeds and seedlings of rice were treated by 0, 0.1, 1.0, 10.0, 100.0 mg/L Cd^2＋ solution. The cell membrane structure was destroyed in various degrees under Cd^2 ＋ stress. The content of MDA and RELR increased with Cd^2＋ concentration increasing and stress lasting. The Cd^2＋ stimulated antioxidant enzymes： activity of SOD, POD and CAT increased by 0.10 - 2.18 times, 0.35 - 2.24 times and 0.43 - 2.35 times, respectively.

关 键 词：镉 水稻 丙二醛 细胞膜透性 抗氧化酶 

分 类 号：S511.01[农业科学—作物学]