Effect of fasting on the composition of the fat body lipid of Dipetalogaster maximus, Triatoma infestans and Panstrongylus megistus (Hemiptera: Reduviidae)

CANAVOSO LE; BERTELLO LE; LEDERKREMER RM; RUBIOLO ER

SPRINGER HEIDELBERG

Lugar: HEIDELBERG; Año: 1998 vol. 168 p. 549 - 549

bstract Modi®cations in content and lipid composition induced by fasting were examined in fat bodies from adults of Triatominae, Dipetalogaster maximus, Triatoma infestans and Panstrongylus megistus. With fasting, total lipid stores dropped approximately 50% for T. infestans and more than 70% for P. megistus. Total lipids analyzed by thin layer chromatography and fractionated by column chromatography on Unisil showed triacylglycerols as the main component in the threespecies, although P. megistus showed high levels of diacylglycerols (31±46%). Cholesterol amounted to 8± 15%. In diacylglycerol fractions, C16:0, C18:1 and C18:0 fatty acids were detected; their ratio varied with species but it was not dependent on nutritional status. In tri-acylglycerol fractions C18:1 fatty acid was the major component at di€erent times (48±68%); the ratio of monounsaturated to saturated in this fraction was 1.3, 2.6 and 1.2 for D. maximus, T. infestans and P. megistus respectively. The