Lonicera implexa leaves bearing naturally laid eggs of the specialist herbivore Euphydryas aurinia have dramatically greater concentrations of iridoid glycosides than other leaves

Josep Peñuelas, Jordi Sardans, Constantí Stefanescu, Teodor Parella, Iolanda Filella

    Research output: Contribution to journalArticleResearchpeer-review

    29 Citations (Scopus)

    Abstract

    We tested in the field the hypothesis that the specialist butterfly Euphydryas aurinia (Lepidoptera: Nymphalidae, Melitaeinae) lays eggs on leaves of Lonicera implexa (Caprifoliaceae) plants with greater iridoid concentrations. We conducted our investigations in a Mediterranean site by analyzing leaves with and without naturally laid egg clusters. There were no significant differences in iridoid glycoside concentrations between leaves from plants that did not receive eggs and the unused leaves from plants receiving eggs, a fact that would seem to indicate that E. aurinia butterflies do not choose plants for oviposition by their iridoid content. However, the leaves of L. implexa that bore egg clusters had dramatically greater (over 15-fold) concentrations of iridoid glycosides than the directly opposite leaves on the same plant. These huge foliar concentrations of iridoids (15% leaf dry weight) may provide specialist herbivores with compounds that they either sequester for their own defense or use as a means of avoiding competition for food from generalist herbivores. Nevertheless, it may still be possible that these high concentrations are detrimental to the herbivore, even if the herbivore is a specialist feeder on the plant. © Springer Science + Business Media, Inc. 2006.
    Original languageEnglish
    Pages (from-to)1925-1933
    JournalJournal of Chemical Ecology
    Volume32
    DOIs
    Publication statusPublished - 1 Sep 2006

    Keywords

    • Euphydryas aurinia
    • Iridoid glycosides
    • Loganic acid
    • Lonicera implexa
    • Oviposition
    • Secologanic acid
    • Secoxyloganic acid

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