Is sequestration structure-specific in the milkweed bug, Oncopeltus fasciatus?
Extracts of Oncopeltus fasciatus adults, fed from the first instar on sunflower seed diets impregnated with bufadienolides-cardenolide analogs, contained no detectable bufadienolides or polar steroid metabolites on TLC. O. fasciatus did sequester cardenolides from host and non-host sources, and bufadienolides were recovered from extracts of impregnated seeds. Possible reasons for the absence of detectable bufadienolides in these insects are suggested.
D000818:Animals; D002018:Bufanolides / Q000378:metabolism*; D002298:Cardenolides / Q000378:metabolism*; D002855:Chromatography, Thin Layer; D006430:Hemiptera / Q000378:metabolism*; D013329:Structure-Activity Relationship
D002018:Bufanolides; D002298:Cardenolides