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Front Plant Sci

Title:		Differential Contribution of Transcription Factors to Arabidopsis thaliana Defense Against Spodoptera littoralis
Author(s):		Schweizer F; Bodenhausen N; Lassueur S; Masclaux FG; Reymond P;
Address:		"Department of Plant Molecular Biology, University of Lausanne Lausanne, Switzerland"
Journal Title:		Front Plant Sci
Year:		2013
Volume:		20130204
Issue:
Page Number:		13 -
DOI:		10.3389/fpls.2013.00013
ISSN/ISBN:		1664-462X (Print) 1664-462X (Electronic) 1664-462X (Linking)
Abstract:		"In response to insect herbivory, Arabidopsis plants activate the synthesis of the phytohormone jasmonate-isoleucine, which binds to a complex consisting of the receptor COI1 and JAZ repressors. Upon proteasome-mediated JAZ degradation, basic helix-loop-helix transcription factors (TFs) MYC2, MYC3, and MYC4 become activated and this results in the expression of defense genes. Although the jasmonate (JA) pathway is known to be essential for the massive transcriptional reprogramming that follows herbivory, there is however little information on other TFs that are required for defense against herbivores and whether they contribute significantly to JA-dependent defense gene expression. By transcriptome profiling, we identified 41 TFs that were induced in response to herbivory by the generalist Spodoptera littoralis. Among them, nine genes, including WRKY18, WRKY40, ANAC019, ANAC055, ZAT10, ZAT12, AZF2, ERF13, and RRTF1, were found to play a significant role in resistance to S. littoralis herbivory. Compared to the triple mutant myc234 that is as sensitive as coi1-1 to herbivory, knockout lines of these nine TFs were only partially more sensitive to S. littoralis but, however, some displayed distinct gene expression changes at the whole-genome level. Data thus reveal that MYC2, MYC3, and MYC4 are master regulators of Arabidopsis resistance to a generalist herbivore and identify new genes involved in insect defense"
Keywords:		Arabidopsis thaliana Myc2 Myc3 Myc4 Spodoptera littoralis defense transcription factors;
Notes:		"PubMed-not-MEDLINESchweizer, Fabian Bodenhausen, Natacha Lassueur, Steve Masclaux, Frederic G Reymond, Philippe eng Switzerland 2013/02/06 Front Plant Sci. 2013 Feb 4; 4:13. doi: 10.3389/fpls.2013.00013. eCollection 2013"