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Antioxidant responses in Mesopodopsis zeylanica at varying salinity to detect mercury influence in culture ponds

DRS at CSIR-National Institute of Oceanography

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Title Antioxidant responses in Mesopodopsis zeylanica at varying salinity to detect mercury influence in culture ponds
 
Creator Verlecar, X.N.
Das, P.B.
Jena, K.
Maharana, D.
Desai, S.R.
 
Subject salinity
mercury
lipids
antioxidants
 
Description Antioxidant responses in the estuarine mysid, Mesopodopsis zeylanica, were used to assess mercury (Hg) metal contamination in relation to salinity. Natural mysids acclimatized at 5 psu were subjected to laboratory exposures of 5, 15, and 25 psu salinity singly and under the sublethal Hg concentration of 5 mu g/L (one-fifth of 24 h LC sub(50) value). Lipid peroxidation in the test species increased with salinity variation from 5 to 15 psu and retained the same up to 25 psu with no change after Hg addition. CAT increased significantly from 5 to 15 psu before Hg influence, and GST increased after addition of the metal. However, a reduction in both these enzymes is evident at higher salinities (25 psu) with or without Hg. The energy cost involved in adjusting ionic concentration with hemolymph during salinity deviation from an isotonic environment could be a cause for the reduction of antioxidants and LPX accumulation at 25 psu. Insignificant changes after Hg addition, however, indicate that Hg sup(2+) free ions did not produce much toxicity to the cellular system. The results suggest that M. zeylanica is comfortable scavenging oxyradicals within the salinity range of 5-15 psu to protect itself from anthropogenic contaminants as evidenced by elevated enzyme activity.
 
Date 2013-01-08T04:51:31Z
2013-01-08T04:51:31Z
2012
 
Type Journal Article
 
Identifier Turkish Journal of Biology, vol.36; 2012; 711-718
http://drs.nio.org/drs/handle/2264/4212
 
Language en
 
Rights ? T?B?TAK. Freely available at publisher site at http://dx.doi.org/10.3906/biy-1203-63. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
 
Publisher The Scientific and Technological Research Council of Turkey