Metabolic transformation of the brassinosteroid 24-epi-castasterone by the cockroach Periplaneta americana.
After feeding of 24-epi-castasterone to the cockroach Periplaneta americana an organ-specific epimerization of the brassinosteroid to 2,24-diepi-castasterone could be detected in female insects. The metabolite being observed only in the ovaries and not in the testes of the insect was identified by GC/MS in comparison with a synthesized authentic sample. Contrary, 24-epi-brassinolide is not metabolized in the sexual organs of Periplaneta americana. This is the first evidence of a metabolic transformation of a brassinosteroid in insects.
Schmidt
J
J
Leibniz-Institut für Pflanzenbiochemie, Abteilung Naturstoffchemie, Halle/S., Germany. jschmidt@ipb.uni-halle.de
Richter
K
K
Voigt
B
B
Adam
G
G
D000818:Animals; D001711:Biotransformation; D002777:Cholestanols / Q000493:pharmacokinetics*; D003058:Cockroaches / Q000378:metabolism*; D005260:Female; D008401:Gas Chromatography-Mass Spectrometry; D008297:Male
D002777:Cholestanols; C083545:castasterone