Journal of Biopesticide

Journal of Biopesticide

2010, Vol. 3, Issue1

BIO-SAFETY EVALUATION OF CYCAS SEED EXTRACT ON TILAPIA, OREOCHROMIS MOSSAMBICUS BY OXIDATIVE METABOLISM


AUTHOR(S)
M. A. RajaMamannan* and G. M. Natarajan

ABSTRACT

The effect of cycas seed extracts (CSE) was observed in tilapia (Oreochromis mossambicus) by exposing them to various concentrations (1, 2, and 5%). The oxidative enzymes, depletion and accumulation in the liver and dorsal muscles were studied on acute (48h/2 days) and chronic (15 and 30 days) conditions. Compared to control, increase (p<0.01) in activity of lactate dehydrogenase (LDH) (EC 1.1.1.27) and decrease (p<0.01) in activity of succinate dehydrogenase (SDH) (EC 1.3.99.1) following CSE exposed fishes were found. Significant (p<0.01) dose dependent depression in SDH and the elevation in LDH, after the acute and chronic conditions in both liver and muscle tissues are favouring an aerobic metabolism in CSE stressed fishes to meet the energy demands. These changes were appeared to favour a less efficient anaerobic metabolism probably due to the inability of tissues in treatment fishes to derive sufficient oxygen for normal metabolic functions. Nonetheless, it’s triggered the anaerobic metabolism and arrests the kreb’s cycle activities. The present bio-intensive study may give an attention towards the Cycas plant extracts in order to develop a very cheap biopesticide.


DOI
https://doi.org/10.57182/jbiopestic.3.1.232-236

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