Cu²⁺对斑马鱼SOD及POD酶活的影响研究

Effects of Cu²⁺ on SOD and POD Enzymatic Activities in Danio rerio

摘要: 以斑马鱼(Danio rerio)为研究对象，研究了不同硬度条件下Cu²⁺对斑马鱼体长体重、SOD和POD酶活性的影响。结果表明，在硬度为50 mg/L与250 mg/L条件下，不同的Cu²⁺浓度，对斑马鱼的体长体重无明显影响。另一方面，Cu²⁺对斑马鱼SOD和POD活性有不同的影响，其中斑马鱼SOD活性在暴露2天后呈现低浓度诱导高浓度抑制的状态。POD活性表现为低浓度为抑制-诱导-抑制效应，高浓度为抑制-诱导效应。

Abstract: Effects of Cu²⁺ on the body weight, body length, SOD and POD enzyme activities of Danio rerio under different water hardness were studied. Results showed that there was no significant effect of different Cu²⁺ concentrations on body length and weight either at water hardness of 50 mg/L or 250 mg/L. However, there were effects of Cu²⁺ concentrations on SOD and POD enzymatic activities of Danio rerio. SOD enzymatic activity was induced at lowCu²⁺ concentrations and was inhabited at high Cu²⁺ concentrations after 2-day exposure. POD enzymatic activity was first inhabited, then induced and then inhabited at low concentrations, while it was first inhabited and then induced at high concentrations.