镉对黑藻叶光化学及硝酸还原酶特性的影响  

Effect of Cadmium on Characteristics of Photochemistry and Nitrate Reductase in the Leaves of Hydrilla verticilla (L.f.) Royle

作　　者：杨艳华[1] 陈国祥[1] 刘少华[1] 王娜[1] 吴国荣[1] 施国新[1] 

机构地区：[1]南京师范大学生命科学学院,南京210097

出　　处：《南京师大学报（自然科学版）》2002年第1期28-32,共5页Journal of Nanjing Normal University(Natural Science Edition)

基　　金：国家自然科学基金 (39770 0 46 );江苏省教育委员会高校科研资助项目 (1999SWX0 0 0 0SJ1)

摘　　要：研究了不同浓度Cd2 + 对黑藻 (Hydrillaverticilla (L .f.)Royle)叶光化学及硝酸还原酶特性的影响 .结果表明 :随着Cd2 + 浓度的增加 ,黑藻叶片的叶绿素含量、叶绿素a和b比值、PSⅠ、PSⅡ及全电子链的活性皆呈现下降的趋势 ;而其叶绿体ATP的含量、硝酸还原酶的活性、类囊体膜的室温吸收光谱和室温荧光发射光谱则呈现先上升后下降的趋势 .实验表明 :可根据黑藻叶光化学及硝酸还原酶特性的变化来监测环境中镉污染的程度 .The effect of Cd 2+ on characteristics of photochemistry and nitrate reductase in the leaves of Hydrilla verticilla (L.f.) Royle was studied. The results indicated: with the increasing of the concentration of cadmium, content of chlorophyll, the ratio of chlorophyll a and b and electron transport activity of photosystem decreased; but the ATP content in chloroplast, nitrate reductase activity, absorption spectrum and fluorescence emission spectrum at room termperature first increased and then decreased. The results showed that the degree of cadmium pollution in the environment could be measured according to the changes of characteristics of photochemistry and nitrate reductase in the leaves of Hydrilla verticilla (L.f.) Royle.

关 键 词：镉 黑藻 光化学特性 硝酸还原酶 重金属污染 叶片 叶绿素 酶活性 

分 类 号：X503.23[环境科学与工程—环境工程]