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Query: institute/department: "FNWI: Institute for Biodiversity and Ecosystem Dynamics IBED" and publication year: "2008"

AuthorsM.R. Kant, M.W. Sabelis, M.A. Haring, R.C. Schuurink
TitleIntraspecific variation in a generalist herbivore accounts for differential induction and impact of host plant defences
JournalProceedings of the Royal Society of London. Series B-Biological Sciences
Volume275
Year2008
Issue1633
Pages443-452
ISSN09628452
FacultyFaculty of Science
Institute/dept.FNWI: Institute for Biodiversity and Ecosystem Dynamics (IBED)
FNWI: Swammerdam Institute for Life Sciences (SILS)
AbstractPlants and herbivores are thought to be engaged in a coevolutionary arms race: rising frequencies of plants with anti-herbivore defences exert pressure on herbivores to resist or circumvent these defences and vice versa. Owing to its frequency-dependent character, the arms race hypothesis predicts that herbivores exhibit genetic variation for traits that determine how they deal with the defences of a given host plant phenotype. Here, we show the existence of distinct variation within a single herbivore species, the spider mite Tetranychus urticae, in traits that lead to resistance or susceptibility to jasmonate (JA)-dependent defences of a host plant but also in traits responsible for induction or repression of JA defences. We characterized three distinct lines of T. urticae that differentially induced JA-related defence genes and metabolites while feeding on tomato plants (Solanum lycopersicum). These lines were also differently affected by induced JA defences. The first line, which induced JA-dependent tomato defences, was susceptible to those defences; the second line also induced JA defences but was resistant to them; and the third, although susceptible to JA defences, repressed induction. We hypothesize that such intraspecific variation is common among herbivores living in environments with a diversity of plants that impose diverse selection pressure.
Document typeArticle
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