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| Influence of Salinity on Activity of Na+/K+-ATPase in Different Organs and Tissues of Mudflat Crab, Helice tientsinensis |
| XU Jing-ming |
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Abstract The activities of Na+ /K+-ATPase in gill ,hepatopancreas and muscle were determined in mud-flat crab Helice tientsinensis exposed to different salinities (0 ,10 ,20 ,30 ,40 and 50) for 9 days at water temperature of 20 ℃ .The results showed that the order of the activity of the Na + /K+-ATPase in differ-ent organs and tissues was ranged at the same salinity as the following :gill> hepatopancreas> muscle , with significant difference (P<0 .05) .The stable activity of the Na+ /K+-ATPase in gill was observed in 9 day salinity exposure in the control group (30) ,40 ,and 50 groups ,just the latter two being slightly higher than the former ,without significant difference (P>0 .05) .There was significant higher activities of the Na+ /K+-ATPase in gills in other groups except 20 salinity group for 3 h salinity exposure than that at the beginning of the exposure (P<0 .05) ,increase in the activity with increase in salinity ,with signifi-cant difference (P<0 .05) from the control group .In the 24 h salinity exposure ,the maximal activity of the Na+ /K+-ATPase in gill was found in 0 ,10 and 20 groups ,followed by stable ,and then at a high lev-el .But the activity of Na+ /K+-A T Pase in hepatopancreas and muscle in the crab exposed to the salinity for 9 days was kept few change compared with the crab in the control group (P>0 .05) .
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Received: 25 August 2014
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