Pollution Research Paper

Vol 33, Issue 04, 2014 ; Page No.(709-713 )

IMPACT OF ENVIRONMENTAL ACIDIC PH ON ANTIOXIDANT DEFENCE MECHANISM OF FRESH WATER FISH, CYPRINUS CARPIO (L)

U. SRINEETHA, M. VENKATA REDDY AND M. BHASKAR

Abstract

The data on the analysis of various antioxidant enzymes were studied at the sub cellular level in the gill and brain of fish, Cyprinus carpio at 7th and 15th days of exposure to sub lethal concentration of acidic media (pH 5.0) besides controls, are presented in Tables 1 and 2. The superoxide dismutase (SOD) and glutathione – s- transferase (GST) activities increased at day 7 and 15 in the gill and brain of experimental fish with a corresponding decrease in the activities of catalase and glutathione peroxidase (GPx) of experimental fish over control. The percent change in the SOD and GST of experimental fish was increased in both the organs at day 7 and at day 15. But the degree of increase was more with the duration of experimentation. In between the two organs the SOD activity was greater in brain than the gill of fish. In contrast to that the percent change of catalase and GPx activities of experimental fish was increased in gill at day 7 and at day 15 and also same trend was observed in the brain of experimental fish at both days over to control fish. In between the two organs the catalase and GPx activities was more in gill than the brain of fish. But the degree of decrease was more with increased the duration of experimentation. It suggest that the effect of acidic pH might have been caused oxidative damage in the gill and brain of fish and also the severity of damage was more with increase the duration of experimentation and tissue specificity.

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