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Antioxidant enzymes are the first line of defense against reactive oxygen species
(ROS) and other free radicals. When the rate of ROS exceeds the capacity of
antioxidant enzymes, non-detoxified radicals begin to attack the bio-molecules.
Therefore, present research work was planned to study the effect of zinc on the
peroxidase activity in the liver and kidney of Catla catla. To check the
concentration based effect, C. catla were exposed, separately, to 96-hr LC50 of
zinc and its sub-lethal concentrations viz. 2/3rd, 1/4th and 1/5th of LC50 for 30 days
at constant laboratory conditions. After 30-day, the fish were sacrificed and their
liver and kidney were analyzed for peroxidase enzyme activity. Change in activity
of peroxidase enzyme in the fish exposed to sub-lethal concentrations was
compared with the control. Dose dependent increase in the activities of
peroxidase enzyme was observed in the tissues of fish as compared to the control
group. Peroxidase activity in the liver of fish from all the treatments was
significantly (p<0.05) higher than that of kidney. The results of these studies in
fish tissues may prove that peroxidase activity can be used as a sensitive bioindicator of the antioxidant defense system.
MARIUM ASLAM, MUHAMMAD JAVED, FAIZA AMBREEN, FARIHA LATIF. (2017) Effect of various concentrations of Zinc on Peroxidase activity of Catla catla, Biologia – Journal of Biological Society of Pakistan, Volume 63 (II), Issue (II).
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