EFFECT OF HEAVY METALS ON ENZYME ACTIVITY IN THE DIGESTIVE GLANDS OF FRESHWATER BIVALVE, PARREYSIA CYLINDRICA FROM DIFFERENT RESERVOIRS OF NASHIK DISTRICT, INDIARAHANE BALASAHEB AND BHALLA RESHAM
The heavy metals Zn, Cu, Pb and Cd concentrations were determined in surface water and the freshwater bivalve Parreysia cylindrica were collected from Girna, Ozarkhed, Chankapur and Gangapur reservoirs of Nasik district during summer, monsoon and winter seasons. The oxidative stress indicator parameters like activity of antioxidant enzymes (Catalase (CAT), Superoxide dismutase (SOD), Glutathione peroxidase (GPx), and Glutathione-S-transferase (GST), the levels of antioxidant scavenger molecules, reduced glutathione (GSH) and lipid peroxidation (LPO) were estimated from digestive glands of the freshwater bivalve Parreysia cylindrica. The results demonstrate that the level of LPO and activity of GST were lowest and activity of antioxidant enzyme CAT, GPx and SOD were highest at Gangapur reservoir and lowest at Girna reservoir. The results also indicates that the level of LPO and activity of GST were lowest and CAT, GPx and SOD activity were highest in monsoon, while level of LPO and activity of GST were highest and CAT, GPx and SOD activity were lowest in summer season at four reservoirs in digestive glands of Parreysia cylindrica. The mean values of heavy metals Zn, Cu, Pb and Cd concentrations in surface water were highest at Girna reservoir and lowest at Gangapur reservoir. Therefore it was concluded that Girna reservoir was more polluted than other studied reservoirs.
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