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Science. 2004 Jul 30;305(5684):665-8. Epub 2004 Jul 1.

Silencing the jasmonate cascade: induced plant defenses and insect populations.

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  • 1Department of Molecular Ecology, Max-Planck-Institute for Chemical Ecology, Hans-Knöll-Strasse 8, Jena 07745, Germany.

Erratum in

  • Science. 2004 Dec 17;306(5704):2042.

Abstract

We transformed the native tobacco, Nicotiana attenuata, to silence its lipoxygenase, hydroperoxide lyase, and allene oxide synthase genes in order to inhibit oxylipin signaling, known to mediate the plant's direct and indirect defenses. When planted into native habitats, lipoxygenase-deficient plants were more vulnerable to N. attenuata's adapted herbivores but also attracted novel herbivore species, which fed and reproduced successfully. In addition to highlighting the value of genetically silencing plants to study ecological interactions in nature, these results show that lipoxygenase-dependent signaling determines host selection for opportunistic herbivores and that induced defenses influence herbivore community composition.

PMID:
15232071
[PubMed - indexed for MEDLINE]
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