铜和锌离子对真鲷幼鱼组织酶活性的影响

研究水中Ｃｕ＾２＋、Ｚｎ＾２＋对真鲷幼鱼组织ＣＡＴ、ＧＰＴ、胃蛋白酶活性的影响。结果表明：真鲷幼鱼暴露于不同浓度Ｃｕ＾２＋（０．５、０．７５、１．５ｍｇ／Ｌ）、Ｚｎ＾２＋（１、２、４ｍｇ／Ｌ）海水中４ｄ后，Ｃｕ＾２＋、Ｚｎ＾２＋对鳃，肝脏ＣＡＴ，胃蛋白酶有抑制作用。

Effects of Copper and Zinc Ions on Activities of Enzymes inTissues of Red Sea Bream Pagrosomus major Juvenile

This paper reported the effects of Cu²⁺ and Zn²⁺ on activities of catalase (CAT),glutamic pyruvic transaminase (GPT) and pepsin in the tissues of red sea bream P.major.Red sea breams were exposed to different concentrations of cupric sulfate solution (0.5,0.75,1.5mg/L)and zinc sulfate solution (1,2,4mg/L)for 4 days.The results showed that the CAT activities in gill and liver and pepsin activities were inhibited by Cu²⁺ and Zn²⁺.At the highest Cu²⁺ concentration groups,the CAT activities in gill and in liver and pepsin activities decreased 73%,33% and 42.8% in relation to control,respectively,while at the highest Zn²⁺ concentration groups,the CAT,GPT and pepsin activities decreased 30%,68.5% and 32.8% in relation to control,respectively.The GPT activities of liver in P.major decreased at all exposure groups.The GPT activities of liver decreased 76% and 67% in relation to control at highest Cu²⁺ and Zn²⁺ concentration groups,respectively.The effects of Cu²⁺ and Zn²⁺ on the CAT,GPT and pepsin had concentration response relationship.