Cr(Ⅵ)对三疣梭子蟹(Portunus trituberculatus)肝胰脏、鳃的SOD活性、MDA及MTs含量的影响

Effects of Cr(Ⅵ) on the activities of SOD,concentration of MDA and MTs inhepatopancreas and gilltsissue of Portunus trituberculatus

通过三疣梭子蟹(Portunus trituberculatus)对Cr(VI)的富集(15 d)和释放实验(15 d)过程中肝胰脏、鳃的SOD活性、MDA及MTs含量的变化,探讨Cr(VI)对三疣梭子蟹不同组织的毒性效应影响及其差异。结果表明,经过15 d的富集,1.50 mg/L、0.30 mg/L实验组肝胰脏、鳃的SOD、MDA及MTs含量均显著高于对照组水平(P<0.05),在15 d的释放后,两个浓度实验组肝胰脏、鳃的SOD、MDA及MTs含量均能够恢复到对照组水平(P>0.05)。三疣梭子蟹鳃的SOD活性,MDA和MTs含量达到峰值的时间早于肝胰脏,但是峰值水平低于肝胰脏,鳃的恢复时间短于肝胰脏。

To explore the toxic effects with a Cr（Ⅵ） exposure period （fifteen days） and elimination period （fifteen days） in hepatopancreas and gill of Portunus trituberculatus, the activities of antioxidant enzyme （SOD） , concentration of lipid peroxidation levels （LPO） and metallothioneins （MTs）were studied. The results showed that the activities of SOD, concentration of MDA and MTs were higher than the control group level （ P 〈 0.05 ） significantly after fifteen days with 1.50 mg/L and 0.30 mg/L exposure concentrations, after evacuation period, both groups could resume to the command level （ P 〉 0.05 ）. The results of this experiment indicated that both hepatopancreasand gill of P. tritu- berculatus possessed resume capacity,the time to reach the peak valuein gillof the activities of SOD, concentration of MDA and MTswas shorter than in hepatopancreas, but the peak value was lower than in hepatopancreas, the recovery timeof gill was shorter than that of hepatopancreas.