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Planta

Title:		Evidence for regulation of resistance in Arabidopsis to Egyptian cotton worm by salicylic and jasmonic acid signaling pathways
Author(s):		Stotz HU; Koch T; Biedermann A; Weniger K; Boland W; Mitchell-Olds T;
Address:		"Department of Genetics and Evolution, Max-Planck-Institute of Chemical Ecology, Jena, Germany. stotzhe@bcc.orst.edu"
Journal Title:		Planta
Year:		2002
Volume:		214
Issue:		4
Page Number:		648 - 652
DOI:		10.1007/s004250100656
ISSN/ISBN:		0032-0935 (Print) 0032-0935 (Linking)
Abstract:		"Signaling cross-talk between wound- and pathogen-response pathways influences resistance of plants to insects and disease. To elucidate potential interactions between salicylic acid (SA) and jasmonic acid (JA) defense pathways, we exploited the availability of characterized mutants of Arabidopsis thaliana (L.) Heynh. and monitored resistance to Egyptian cotton worm (Spodoptera littoralis Boisd.; Lepidoptera: Noctuidae). This generalist herbivore is sensitive to induced plant defense pathways and is thus a useful model for a mechanistic analysis of insect resistance. As expected, treatment of wild-type Arabidopsis with JA enhanced resistance to Egyptian cotton worm. Conversely, the coil mutant, with a deficiency in the JA response pathway, was more susceptible to Egyptian cotton worm than wild-type Arabidopsis. By contrast, the nprl mutant, with defects in systemic disease resistance, exhibited enhanced resistance to Egyptian cotton worm. Pretreatment with SA significantly reduced this enhanced resistance of nprl plants but had no influence on the resistance of wild-type plants. However, exogenous SA reduced the amount of JA that Egyptian cotton worm induced in both npr1 mutant and wild-type plants. Thus, this generalist herbivore engages two different induced defense pathways that interact to mediate resistance in Arabidopsis"
Keywords:		"Animals Arabidopsis/*drug effects/genetics/parasitology Cyclopentanes/metabolism/*pharmacology Genotype Immunity, Innate/drug effects Mutation Oxylipins Plant Diseases/parasitology Salicylic Acid/metabolism/*pharmacology Signal Transduction Spodoptera/dru;"
Notes:		"MedlineStotz, Henrik U Koch, Thomas Biedermann, Anja Weniger, Kerstin Boland, Wilhelm Mitchell-Olds, Thomas eng Comparative Study Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. Germany 2002/04/02 Planta. 2002 Feb; 214(4):648-52. doi: 10.1007/s004250100656"