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The transcription factor ATAF2 represses the expression of pathogenesis‐related genes in Arabidopsis

The transcription factor ATAF2 represses the expression of pathogenesis‐related genes in Arabidopsis ATAF2, a member of the plant‐specific NAC‐domain transcription factor family, is highly induced in leaves at a wound site and is responsive to the wound‐related phytohormones methyl jasmonate and salicylic acid, but not to abscisic acid. Overexpression of ATAF2 leads to an increased biomass and yellowing of the leaves, but there is no obvious phenotype in two independent ATAF2 T‐DNA insertion lines. At the transcriptome level, ATAF2 overexpression resulted in repression of a number of pathogenesis‐related proteins. Conversely, four of these pathogenesis‐related transcripts were increased in both ATAF2 knock‐out lines. ATAF2 overexpressing plants showed a higher susceptibility to the soil‐borne fungal pathogen Fusarium oxysporum. Our results indicate that ATAF2 functions as a repressor of pathogenesis‐related proteins in Arabidopsis. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png The Plant Journal Wiley

The transcription factor ATAF2 represses the expression of pathogenesis‐related genes in Arabidopsis

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References (58)

Publisher
Wiley
Copyright
Copyright © 2005 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0960-7412
eISSN
1365-313X
DOI
10.1111/j.1365-313X.2005.02488.x
pmid
16115070
Publisher site
See Article on Publisher Site

Abstract

ATAF2, a member of the plant‐specific NAC‐domain transcription factor family, is highly induced in leaves at a wound site and is responsive to the wound‐related phytohormones methyl jasmonate and salicylic acid, but not to abscisic acid. Overexpression of ATAF2 leads to an increased biomass and yellowing of the leaves, but there is no obvious phenotype in two independent ATAF2 T‐DNA insertion lines. At the transcriptome level, ATAF2 overexpression resulted in repression of a number of pathogenesis‐related proteins. Conversely, four of these pathogenesis‐related transcripts were increased in both ATAF2 knock‐out lines. ATAF2 overexpressing plants showed a higher susceptibility to the soil‐borne fungal pathogen Fusarium oxysporum. Our results indicate that ATAF2 functions as a repressor of pathogenesis‐related proteins in Arabidopsis.

Journal

The Plant JournalWiley

Published: Sep 1, 2005

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