Cd Pb复合处理下对植物膜的伤害初探  

Preliminary studies on injury to the membrane system in plants under treatment of cadimium and lead

作　　者：赵菲佚[1] 翟禄新[1] 陈荃[1] 张明泉[2] 曾福礼[3] 

机构地区：[1]天水师范学院生物系,甘肃天水741001 [2]兰州大学资源环境学院 [3]兰州大学生命科学学院,甘肃兰州730000

出　　处：《兰州大学学报（自然科学版）》2002年第2期115-120,共6页Journal of Lanzhou University(Natural Sciences)

摘　　要：以黄瓜、小麦为试验材料 ,以 Cd,Pb复合浓度进行处理 .研究了在不同处理水平下两种植物叶片的质膜透性、丙二醛、超氧化物岐化酶和过氧化物酶活性的变化 .重点讨论了 Cd,Pb复合处理对植物膜系统的伤害机理 .结果表明 :不同的 Cd,Pb复合浓度处理后植物的膜脂过氧化作用加剧、质膜透性增高 ,复合处理条件下 Cd,Pb表现明显的相互作用 ,不同的植物及不同的浓度组合有着不同的影响 ,对植物膜系统有严重的伤害 。Cucumber (Cucumis Sativas) and wheat (Triticum aestivum) were treated in hydroponics culture with different concentrations of Cd and Pb.The effects on the membrane permeability,MDA,activity of super oxide dismate (SOD) and peroxides (POX) were studied respectively.The experiment results showed that after treatment,the lipid peroxidation was aggravated and the membrane permeability raised.The obvious interaction between Cd and Pb changed with different plants and different concentration combinations.The treatment of Cd and Pb seriously injured the membrane system of the plant,and was related to the activity of free radicals.

关 键 词：CdPb复合处理 植物膜 伤害机理 黄瓜 小麦 重金属污染 镉 铅 质膜透性 酶活性 

分 类 号：X503.231[环境科学与工程—环境工程]