中文摘要：

将栉孔扇贝置于不同浓度的Cu^2＋溶液中10d，测定其鳃组织过氧化氢酶（CAT）。谷胱甘肽过氧化物酶（GSH-PX），超氧化物歧化酶（SOD）的活性。结果表明，随着Cu^2＋浓度的增高，CAT的活性先降后升再降，SOD的活性先降后升再降，GSH—PX的活性先降后升，但整体仍是抑制的特性。另外，对于低浓度Cu^2＋长期暴露，栉孔扇贝鳃组织中SOD较CAT和GSH—PX敏感．可考虑作为水生生态系统中低浓度Cu^2＋长期暴露的一种生物检测指标。

英文摘要：

The aim of this work was to study the effect of Cu^2＋ on the activities of antioxidant enzyme CAT,SOD and GSH- PX in the Gill of Chlamys farreri. After 10day＇s exposure experiment,the results showed that within the range of Cu^2＋ dosages the activities of CAT and SOD were inhabited in low level of Cu^2＋,inducted and inhabited with the high level of Cu^2＋;the activitie of GSH-PX was inhabited and inducted from low level of Cu^2＋ to high level of Cu^2＋. The activities of CAT, SOD and GSH-PX were highest at o.oomg·L^-1 Cu^2＋. These results also suggest that SOD was more sensitive than CAT and GSH-PX to low dose Cu^2＋ exposure,and they could be served as bio-monitoring index of lowconcentration Cu^2＋ exposure in aquatic ecosystem.