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Production of cardenolides in different life stages of the chrysomelid beetle <i>Oreina gloriosa</i>
Auteur(s)
Eggenberger, F.
Date de parution
1993
In
Journal of Insect Physiology, Elsevier, 1993/39/9/751-759
Résumé
Cardenolide production in larval, pupal, and adult leaf beetles <i>Oreina gloriosa</i> (Coleoptera: Chrysomelidae) is compared. Significantly different levels of cardenolides were found in the various developmental stages of this species: early and late fourth-instar larvae (14 and 19 nmol, respectively), pupae (10 nmol), 1-day-old imagos (8 nmol). The developmental effects on individual cardenolides were considerable. Whereas fourth-instar larvae and pupae mainly produce diglycosides (periplogenin-3-<i>O</i>-[β-d-xylopyranosyl-(1→4)-β-d-allopyranoside] and digitoxigenin-3-<i>O</i>-[β-d-xylopyranosyl-(1→4)-β-d-allopyranoside]) and their corresponding monoglycosides, the mixture of cardenolides in adult beetles is clearly more complex, containing increased amounts of acetylated mono- and diglycosides. There were at least 13 different cardenolides in extracts of 1-day-old imagos, spanning a broader range of polarity than the highly polar cardenolides found in extracts of the immature beetles. The biological significance of these chemical differences is discussed.
Identifiants
Type de publication
journal article
