Cd、Zn复合污染对水车前叶绿素含量和活性氧清除系统的影响  

Effects of Cd and Zn combined pollution on chlorophyll content and scavenging system of activated Oxygen in Leaves of Ottelia alismoides(L.)Pers.

作　　者：徐勤松[1] 施国新[1] 周红卫[1] 徐楠[1] 张小兰[1] 曾晓敏[1] 

机构地区：[1]南京师范大学生命科学学院,南京210097

出　　处：《生态学杂志》2003年第1期5-8,共4页Chinese Journal of Ecology

基　　金：国家自然科学基金项目 (3 9770 0 46)

摘　　要：主要研究了重金属Cd、Zn单一及复合污染对水车前叶绿素含量和活性氧清除系统的影响。超氧化物歧化酶 (SOD)、过氧化物酶 (POD)、过氧化氢酶 (CAT)活性都在 0 1mg·L-1Cd处理浓度时达到峰值 ,随培养浓度的增加 ,活性下降。叶绿素含量则随处理的浓度的上升而呈递减趋势。在各Cd处理梯度中加入Zn后 ,随加入Zn浓度的增大 ,上述各指标与单一Cd处理差异显著性增强 ,表明Zn增强了Cd的毒害作用 。Effects of single and combined pollution of Cd and Zn on chlorophyll content and scavenging system of activated oxygen in leaves of Ottelia alismoides (L.)Pers. was measured. The results showed that the activity of SOD, POD and CAT was up to the highest point at 0.1mg·L -1 of Cd culture concentration and decreased afterwards. The content of chlorophyll decreased with the increase of Cd culture concentration. A much more difference appeared when Zn was added to the solution than single Cd stress, which indicated that Zn strengthened the toxic effect of Cd. There was a synergistical action between Cd and Zn on the effect of scavenging system of activated oxygen and chlorophyll content.

关 键 词：Cd ZN 复合污染 水车前 叶绿素含量 活性氧清除系统 影响 沉水植物 重金属污染 

分 类 号：X503.2[环境科学与工程—环境工程]