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Biochemical markers of oxidative stress in Perna viridis exposed to mercury and temperature

DRS at CSIR-National Institute of Oceanography

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Title Biochemical markers of oxidative stress in Perna viridis exposed to mercury and temperature
 
Creator Verlecar, X.N.
Jena, K.B.
Chainy, G.B.N.
 
Subject Reduced glutathione
antioxidant properties
Lipid peroxidation
Antioxidant enzymes
 
Description Oxidative damage and antioxidant properties have been studied in Perna viridis subjected to short-term exposure to Hg along with temperature (72 h) and long-term temperature exposures (14 days) as pollution biomarkers. The elevated thiobarbituric acid reactive substances (TBA-RS) levels observed in gills and digestive gland under exposure to Hg, individually and combined with temperature, as also long-term temperature stress have been assigned to the oxidative damage resulting in lipid peroxidation (LPX). Increased activities of antioxidants such as superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPX), glutathione reductase (GR) and glutathione-S-transferase (GST) both in gills and digestive glands under long-term exposures to temperatures are more prominent to heat rather than cold stress suggesting activation of physiological mechanism to scavenge the ROS produced during heat stress. Also decreased values of reduced glutathione (GSH) on long exposures to temperature stress indicate utilisation of this antioxidant, either to scavenge oxiradicals or act in combination with other enzymes, was more than its production capacity under heat stress. The results suggest that temperature variation does alter the active oxygen metabolism by modulating antioxidant enzyme activities, which can be used as biomarker to detect sublethal effects of pollution.
 
Date 2007-04-12T06:30:07Z
2007-04-12T06:30:07Z
2007
 
Type Journal Article
 
Identifier Chemico-Biological Interactions, vol.167(3), 219-226pp.
http://drs.nio.org/drs/handle/2264/575
 
Language en
 
Rights An edited version of this paper was published by Elsevier. Copyright [2007] Elsevier
 
Format 191779 bytes
application/pdf
 
Publisher Elsevier