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海洋科学  2011 

盐度突变对半滑舌鳎血浆渗透压和鳃丝Na+/K+-ATP酶活性的影响

, PP. 27-31

Keywords: 半滑舌鳎(Cynoglossus,semilaevis),盐度,血液渗透压,鳃丝Na+/K+-ATP,酶活性

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Abstract:

研究了半滑舌鳎(Cynoglossussemilaevis)由盐度30突变至0、10、20、35和40盐度后血浆渗透压和鳃丝Na+/K+-ATP酶活性的变化。结果表明,盐度对半滑舌鳎血液渗透压和鳃丝Na+/K+-ATP酶活性均有显著影响(P<0.05)。盐度突变后,各处理组的血液渗透压和鳃丝Na+/K+-ATP酶活性均随盐度的变化而相应地上升和下降,且其变化幅度与盐度的变化幅度直接相关。各处理组血液渗透压在经历盐度变化6d内有峰值变化,峰值出现在2d时,6d后血液渗透压趋于稳定;而鳃丝Na+/K+-ATP酶活性在经历盐度变化9d时调节至稳定状态,峰值则出现在6d时,峰值大小亦与盐度的变化幅度正相关。本研究表明半滑舌鳎对盐度可能具有较强的适应能力。

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