Dietary Sterol Preference in the Silkworm, Bombyx mori
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Since insects are unable to biosynthesize sterols <I>de novo</I>, sterols must be obtained from dietary sources. Although it has been reported that β-sitosterol is crucial for larval growth in the silkworm, <I>Bombyx mori</I>, little has been investigated concerning the dietary selection of sterols by <I>Bombyx</I> larvae. Here, we demonstrate that <I>Bombyx</I> larvae have the following sterol preference: β-sitosterol >> ergosterol > cholesterol = stigmasterol. Interestingly, <I>Bombyx</I> larvae preferred ergosterol, an inhibitory sterol on larval growth, indicating that sterol selection following first contact of the diet with the mouthpart might be different from the sterol recognition mechanism present in sterol metabolism.
- Agricultural and Biological Chemistry
Agricultural and Biological Chemistry 70(12), 3094-3098, 2006-12-23
Japan Society for Bioscience, Biotechnology, and Agrochemistry