Notice of Retraction Recovery Changes of Antioxidant Defenses in Gill of Grass Carp (Ctenopharyngodon idellus) after Removing Short-Period Mercury Exposure

In this study, the activities of SOD, CAT and GPX, and the contents of GSH and MDA in gill of grass carp, Ctenopharyngodon idellus, were measured to be used to explore the recovery changes of antioxidant defenses after short-period mercury exposure was removed. The results showed that the activities of SOD, CAT and GPX were significantly higher than those of the control after mercury exposure was just removed (p ;0.05). However, GSH content, compared with the control, was obviously lower on day 0 (p st day, MDA content was shown to be recovered to the level of the control. In conclusion, the activities of antioxidant enzymes in gill of grass carp were higher at the beginning of recovery process, which were induced by oxidative stress to enhance the ability of antioxidant defense to cope with the damage of mercury stress. In addition, the indices of antioxidant defenses were sensitive and might be used as biomarkers to indicate recovery status of physiological metabolism after short-period mercury exposure was removed.