Effects of Cadmium Chloride on Activity of Superoxide Dismutase in Gill and Liver Tissues of Carassius Auratus Red Variety

Objective To explore the activity of the superoxide dismutase(SOD)of pure Carassius auratus red variety when it was exposed to cadmium Chloride.Methods Twenty-eight Carassius auratus red variety were randomly and averagely divided into 4 groups.The groups were randomly exposured in different concentrations of cadmium(CdCl2·2.5H2O) with 0 mg/L,0.2 mg/L,0.8 mg/L,1.6 mg/L for 30 days.The total superoxide dismutase(T-SOD) activities in gill and liver tissues were detected.Results CdCl2 increased the T-SOD activity of liver tissue in low-dose group,T-SOD activity of liver tissue was significantly higher than normal control group(P0.05).In middle-dose and high-dose group,T-SOD activity of liver tissue was significantly inhibited than normal control group(P0.05 or P0.01);T-SOD activity in liver tissue was higher than in gill tissue(P0.01).Conclusion Cadmium can conspicuously cause superoxide dismutase activityinhibited in liver tissue of Carassius auratus red variety.