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Sesquiterpene lactones are defensive compounds which protect plants against a variety of herbivores and other natural enemies. Sesquiterpene lactones from higher plants can be divided into two groups based on the stereochemistry of their lactone ring junction, either cis-fused or trans-fused. It is unclear whether and how this variation affects potentially important ecological interactions. To investigate...
Natural populations of wild cabbage (Brassica oleracea) show significant qualitative diversity in heritable aliphatic glucosinolates, a class of secondary metabolites involved in defence against herbivore attack. One candidate mechanism for the maintenance of this diversity is that differential responses among herbivore species result in a net fitness balance across plant chemotypes. Such top-down...
Phytic acid is abundant in the fruits and seeds of many plants and is found in foliage to a lesser extent. Among its several properties, phytic acid is a potent chelator of essential minerals and proteins; thus, the possibility exists that heme-based enzymes such as cytochrome P450 monooxygenases in herbivores are detrimentally affected by phytic acid via chelation of dietary iron. Mortality, growth...
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