A simple method for in vivo testing of glandular enzymatic activity on potential precursors of larval defensive compounds inPhratora species (Coleoptera: Chrysomelinae) |
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Authors: | P Soetens J M Pasteels D Daloze |
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Institution: | (1) Laboratoire de Biologie Animale et Cellulaire, Université Libre de Bruxelles, Avenue Franklin D. Roosevelt 50, CP 160/12, B-1050 Bruxelles, Belgium;(2) Laboratoire de Chimie Bio-organique, Université Libre de Bruxelles, Avenue Franklin D. Roosevelt 50, CP 160/07, B-1050 Bruxelles, Belgium |
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Abstract: | The presence of glandular -glucosidase and oxidase-specific activities, and the possible role of phenolglucosides and related compounds as precursors for larval defensive compounds, were directly demonstrated by introducing salicin, saligenin and helicin into the defensive glands ofPhratora species.Ph. tibialis andPh. laticollis that normally secrete endogenously-produced iridoid monoterpenes and do not use phenolglucosides from their food sources as precursors, were able to produce salicyladehyde from helicin when the latter was introduced into the defensive glands. |
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Keywords: | Defensive secretion -glucosidase" target="_blank">gif" alt="beta" align="MIDDLE" BORDER="0">-glucosidase oxidase salicin Phratora Chrysomelinae |
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