Some macromolecular abnormalities induced by a sublethal dose of cymbush 10EC in adult beetles of Tribolium castaneum
1998
Shakoori, A.R. | Saleem, M.A. (Punjab Univ., Lahore (Pakistan). Dept. of Zoology) | Mantle, D.
Sublethal concentration (20ppm) of a synthetic pyrethroid, Cymbush 10EC (Cypermethrin), administered to adult beetles of Tribolium castaneum for a period of 72 hours, caused an increase in almost all the enzyme activities related with carbohydrate metabolism i.e. amylase (15%), trehalase (92%), invertase (35%), lactase (30%) and maltase (31%). This showed utilization of reserve carbohydrates, which was also evidenced by depleted levels of glucose (53%) and glycogen (43%) contents under insecticidal stress conditions. Conversely, lipids and cholesterol contents increased 15% and 11%, respectively. Of the remaining macromolecule, tested in this study, alkaline phosphatase (28%), acid phosphatase (39%), cholinesterase (34%), fructose (22%), DNA (19%) and RNA (23%) contents were increased, while lactate dehydrogenase (25%), protease (20%) and total proteins (21%) were decreased. The isocitrate dehydrogenase, aspartate aminotransferase, alanine aminotransferase, FAA and uric acid content however, did not show any response. Sublethal concentration of Cymbush, therefore, induced significant abnormalities in the concentration of almost all the macromolecule, enzymes and metabolites of T. castaneum.
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