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Physiol Plant

Title:		Constitutive expression of Arabidopsis NPR1 confers enhanced resistance to the early instars of Spodoptera litura in transgenic tobacco
Author(s):		Meur G; Budatha M; Srinivasan T; Rajesh Kumar KR; Dutta Gupta A; Kirti PB;
Address:		"School of Life Sciences, University of Hyderabad, Hyderabad 500046, India"
Journal Title:		Physiol Plant
Year:		2008
Volume:		20080407
Issue:		4
Page Number:		765 - 775
DOI:		10.1111/j.1399-3054.2008.01098.x
ISSN/ISBN:		1399-3054 (Electronic) 0031-9317 (Linking)
Abstract:		"In Arabidopsis, NPR1 (AtNPR1) regulates salicylic acid (SA)-mediated activation of PR genes at the onset of systemic acquired resistance. AtNPR1 also modulates SA-induced suppression of jasmonic acid-responsive gene expression, and npr1 mutants manifest enhanced herbivore resistance. We have raised stable transgenic tobacco lines, expressing AtNPR1 constitutively, which showed elevated expression of PR1 and PR2 genes upon SA treatment. Herbivore bioassays with a generalist polyphagous pest, Spodoptera litura, revealed that the transgenic lines exhibited enhanced resistance compared to the wild-type plants, particularly with respect to younger larval populations. Insect-mediated injury induced several protease inhibitors (PIs), more significantly a 40-kDa serine PI in all the tobacco lines, but the induction was higher in the transgenic plants. We show in this communication that heterologous expression of AtNPR1 provides enhanced resistance to early larval populations of the herbivore, Spodoptera in transgenic tobacco plants"
Keywords:		"Animals Arabidopsis/*metabolism Arabidopsis Proteins/*metabolism Biological Assay Feeding Behavior/drug effects Gastrointestinal Tract/enzymology Gene Expression Regulation, Plant/drug effects Genes, Plant Immunity, Innate/drug effects Larva/drug effects;"
Notes:		"MedlineMeur, Gargi Budatha, Madhusudhan Srinivasan, Tantravahi Rajesh Kumar, Koppolu Raja Dutta Gupta, Aparna Kirti, Pulugurtha Bharadwaja eng Research Support, Non-U.S. Gov't Denmark 2008/04/10 Physiol Plant. 2008 Aug; 133(4):765-75. doi: 10.1111/j.1399-3054.2008.01098.x. Epub 2008 Apr 7"