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Changes of Na+-K+-ATPase Activity of Oreochromis Niloticus in Freshwater and Seawater
Author(s): LI Ai-jing, LI Xue-jun
Pages: 102-
105
Year: 2005
Issue:
4
Journal: JOURNAL OF HENAN NORMAL UNIVERSITY(NATURAL SCIENCE)
Keyword: 尼罗罗非鱼; Na+-K+-ATPase活性; 淡水; 海水; 鳃; 肾;
Abstract: 用ATPase活性测试盒测定了尼罗罗非鱼鳃和肾中Na+-K+-ATPase活性在海、淡中的变化.从淡水到海水中,尼罗罗非鱼鳃和肾Na+-K+-ATPase活性分别增强了1.61倍和1.41倍;把尼罗罗非鱼由淡水直接放入海水,鳃中的Na+-K+-ATPase活性升高较剧烈,在前期(0.5 h)最高,在鱼即将死亡的后期(8 h)次之,在中期(3 h)较低;肾中Na+-K+-ATPase活性升高较缓慢,在前期较小,中期较高,后期最高.除了在淡水中,肾的Na+-K+-ATPase活性高于鳃外,在海水中以及海水的前期、中期和后期中,鳃的Na+-K+-ATPase活性都高于肾,与肾相比,鳃对肾盐协迫更为敏感.
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