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Plant Physiology Preview Published on January 25, 2008; 10.1104/pp.107.115691
OPEN ACCESS ARTICLE
Received December 31, 2007 Regulation and Function of Arabidopsis JAZ Genes in Response to Wounding and Herbivory
Department of Energy-Plant Research Laboratory, and Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI 48824, USA; Institute of Biological Chemistry, Washington State University, Pullman, WA 99164-6340; Present address: Colorado State University, San Luis Valley Research Center, 0249 East Road 9 North, Center, CO 81125 * Corresponding author; email: howeg{at}msu.edu.
Jasmonic acid (JA) and its amino acid conjugate, jasmonoyl-isoleucine (JA-Ile), play important roles in regulating plant defense responses to insect herbivores. Recent studies indicate that JA-Ile promotes the degradation of JAsmonate ZIM-domain (JAZ) transcriptional repressors through the activity of the E3 ubiquitin-ligase SCFCOI1. Here, we investigated the regulation and function of JAZ genes during the interaction of Arabidopsis with the generalist herbivore Spodoptera exigua. Most members of the JAZ gene family were highly expressed in response to S. exigua feeding and mechanical wounding. JAZ transcript levels increased within 5 min of mechanical tissue damage, coincident with a large (
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