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An ecdysteroid (22-acetyl-20-hydroxyecdysone) from the defense gland secretion of an insect: <Emphasis Type="Italic">Chrysolina carnifex</Emphasis> (Coleoptera: Chrysomelidae) |
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| Authors: | Pascal?Laurent Jean-Claude?Braekman Désiré?Daloze |
| Institution: | (1) Laboratory of Bio-organic Chemistry, Department of Organic Chemistry, Free University of Brussels, CP 160/07, 50, Av. F.D. Roosevelt, 1050 Brussels, Belgium;(2) Laboratory of Cellular and Animal Biology, Free University of Brussels, CP 160/07, 50, Av. F.D. Roosevelt, 1050 Brussels, Belgium |
| Abstract: | Summary. 22-Acetyl-20-hydroxyecdysone was identified as a major component in the secretion of elytral and pronotal glands of Chrysolina carnifex, at an estimated concentration of 1.5 x 10-1 M. This unexpected high concentration of an ecdysteroid in an exocrine secretion of an insect is discussed in terms of its potential defensive function, and in the light of steroid production in similar glands of closely related leaf beetles. |
| Keywords: | ecdysteroid chemical defense leaf beetles Chrysomelidae |
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