Transduction of wound and herbivory signals in plastids.
Plastids are the central orchestrators of the early and late responses to wounding and herbivory in plants. This organelle houses some of the most important enzymes involved in the biogenesis of intra and extracellular signals that mediate defense responses against these stresses. Among these enzymes are the ones initiating the biosynthesis of oxylipins [e.g., jasmonic acid (JA) and C(6) volatiles], terpenoid volatiles and phenolic compounds, including both volatile [e.g., methylsalicylate (MeSA)] and non-volatile compounds [e.g., salicylic acid (SA)]. Plastids also play a major role in orchestrating changes in primary metabolism during herbivory and thereby in the reallocation of carbon and nitrogen to different functions in response to herbivory. How the primary stress signals generated by mechanical damage and herbivory reach the plastid to activate the rapid synthesis of these signal molecules is at present largely unknown.
Bonaventure
Gustavo
G
Department of Molecular Ecology; Max Planck Institute for Chemical Ecology; Jena, Germany.
Baldwin
Ian T
IT
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