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| Effect of sub-chronic copper exposure on the antioxidant system in the gills of Anodonta woodiana |
| Received:September 12, 2018 |
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| KeyWord:Anodonta woodiana;gills;antioxidant system;copper |
| Author Name | Affiliation | E-mail | | LIN Zi-gen | School of Life Science, Shanxi University, Taiyuan 030006, China | | | JING Wei-xin | School of Life Science, Shanxi University, Taiyuan 030006, China | | | WANG Lan | School of Life Science, Shanxi University, Taiyuan 030006, China | langwang@sxu.edu.cn |
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| Abstract: |
| To explore the effect of freshwater copper (Cu) pollution on the antioxidant system in the gills of the mussel Anodonta woodiana, the activities of superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx), and glutathione S-transferase (GST), and the contents of reduced glutathione (GSH), and malondialdehyde (MDA), and total antioxidant capacity (T-AOC) in mussel gills exposed to Cu2+ (0.137, 0.548, 2.192 mg·L-1) for 7, 14, 21 and 28 d, were tested. The results showed that:MDA content increased with increased Cu2+ concentration and extended exposure time, showing "dose-effect" and "time-effect" relationships. With Cu2+ exposure, the activity of antioxidant enzymes SOD, GPx, and GST were significantly induced (P<0.05), while the activity of CAT was significantly inhibited (P<0.05), in comparison to the control group. In addition, the content of the antioxidant GSH decreased significantly (P<0.05). T-AOC was significantly higher (P<0.05) than the control group after exposure to Cu2+ for 14, 21 and 28 d. Overall, the antioxidant system in gills of A. woodiana was activated under Cu2+ exposure, but the gills still suffered oxidative damage. In addition, the responses of GPx, GST, and GSH to Cu2+ exposure were the most sensitive among the indicators detected in this study, which could provide a scientific basis for using A. woodiana to monitor and assess freshwater copper pollution. |
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