UNIQUE STEROL IN THE ECOLOGY AND NUTRITION OF DROSOPHILA PACHEA.
Drosophila pachea, which breeds only in the stems of senita cactus (Lophocereus schottii) throughout the Sonoran Desert, requires the cactus as a dietary supplement when reared on laboratory media. Delta(7)-Stigmasten-3beta-ol, isolated from the cactus or synthesized, can replace the cactus in the diet of flies reared nonaseptically or axenically. Delta(7)-Cholesten-3beta-ol and Delta(5, 7)-cholestadien-3beta-ol could be substituted for the cactus sterol; Delta(5, 7)-stigmastadien-3beta-ol produced infertile females. Cholesterol, 4alpha-methyl-Delta(7)-cholesten-3beta3-ol, beta-sitosterol, stigmasterol, ergosterol, and Delta(7)-ergosten- 3beta-ol did not support larval growth.
D000818:Animals; D001669:Biochemical Phenomena; D001671:Biochemistry; D002784:Cholesterol; D004032:Diet; D004175:Diptera; D004330:Drosophila; D004463:Ecology; D004875:Ergosterol; D005260:Female; D007814:Larva; D008660:Metabolism; D009752:Nutritional Status; D012106:Research; D012855:Sitosterols; D013261:Sterols
D012855:Sitosterols; D013261:Sterols; C025473:gamma-sitosterol; D002784:Cholesterol; D004875:Ergosterol
BIOCHEMISTRY; DROSOPHILA; ECOLOGY; EXPERIMENTAL LAB STUDY; METABOLISM; STEROLS