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Stage- and sex-dependent changes in the lipid profile of Dysdercus koenigii (Heteroptera: Pyrrhocoridae) during development

Published online by Cambridge University Press:  28 February 2007

Archana Mishra
Affiliation:
Department of Zoology, Banaras Hindu University, Varanansi, 221005, India
A.K. Singh
Affiliation:
Department of Zoology, Banaras Hindu University, Varanansi, 221005, India
Dinesh Kumar*
Affiliation:
Department of Zoology, Banaras Hindu University, Varanansi, 221005, India
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Abstract

Lipids were extracted from the plasma and gonads of fourth and fifth instars and adults of Dysdercus koenigii (Heteroptera: Pyrrhocoridae). Thin layer chromatography of the extracts revealed fractions of free fatty acids (FFA), monoglycerides (MG), diglycerides (DG), triglycerides (TG), phospholipids (PL), free cholesterol (FC) and esterified cholesterol (EC). There were distinct differences in the lipid profiles within sexes for both tissues during development. Phospholipid from female plasma showed significant fluctuation during development, while that from males remained constant. In female gonads, PL levels increased significantly from the fouth instar to the fifth instar. Monoglycerides were detected only in adult male plasma and adult female gonads, at very low levels. Plasma DG in males was found to increase significantly during development. Maximum gonadal DG was recorded in male fourth instars and female fifth instars. Triglycerides in female plasma declined from the fourth instar to the adult stage. In contrast, TG in gonads increased significantly in the fifth instar of both sexes. Plasma FFA of both sexes fluctuated during development. Free cholesterol was detected only in adult male plasma. Plasma EC increased from the fourth instar to the adult stage in males, and it was highest in gonads of fifth instars of both sexes.

Type
Research Article
Copyright
Copyright © ICIPE 2004

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