title: Lipoxygenase-mediated modification of insect elicitors: generating chemical diversity on the leaf wound surface.
abstract: Plants can distinguish mechanical damage from larval folivory through the recognition of specific constituents of larval oral secretions (OS) which are deposited on the surface of leaf wounds during feeding. Fatty acid-amino acid conjugates (FACs) are major constituents of the OS of Lepidopteran larvae and they are strong elicitors of herbivore-induced defense responses in several plant species, including the wild tobacco Nicotiana attenuata. When OS from Manduca sexta larvae is deposited on N. attenuata wounded leaves, the major FAC N-linolenoyl-glutamic acid (18:3-Glu) is modified within seconds by a heat labile process. Some of the major modified forms are oxygenated products derived from 13-lipoxygenase activity and one of these derivatives, 13-oxo-13:2-Glu, is an active elicitor of enhanced JA biosynthesis and differential monoterpene emission in N. attenuata leaves.
authors.affiliation: Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Jena, Germany.
authors.forename: Arjen
authors.initials: A
authors.lastname: VanDoorn
authors.forename: Ian T
authors.initials: IT
authors.lastname: Baldwin
authors.forename: Gustavo
authors.initials: G
authors.lastname: Bonaventure
mesh_terms: D000818:Animals; D007313:Insecta / Q000502:physiology*; D058945:Lipoxygenases / Q000378:metabolism*; D018515:Plant Leaves / Q000469:parasitology*; D014026:Nicotiana / Q000469:parasitology*
chemical_list: D058945:Lipoxygenases