Does chromatin remodeling mark systemic acquired resistance?

H.A. van den Burg, F.L.W. Takken

Research output: Contribution to journalArticleAcademicpeer-review

65 Citations (Scopus)

Abstract

The recognition of plant pathogens activates local defense responses and triggers a long-lasting systemic acquired resistance (SAR) response. Activation of SAR requires the hormone salicylic acid (SA), which induces SA-responsive gene expression. Recent data link changes in gene expression to chromatin remodeling, such as histone modifications and histone replacement. Here, we propose a model in which recruitment of chromatin-modifying complexes to SA-responsive loci controls their basal and SA-induced expression. Basal repression of these loci requires the post-translational modifier SUMO (SMALL UBIQUITIN-LIKE MODIFIER). This is of particular relevance because SUMO conjugation has been shown to control the activity, assembly and disassembly of chromatin-modifying complexes to transcription complexes. Chromatin remodeling could be instrumental for priming of SA-responsive loci to enable their enhanced reactivation upon subsequent pathogen attack
Original languageEnglish
Pages (from-to)286-294
JournalTrends in Plant Science
Volume14
Issue number5
DOIs
Publication statusPublished - 2009

Keywords

  • salicylic-acid
  • transcription factors
  • disease-resistance
  • histone acetylation
  • defense responses
  • gene-expression
  • negative regulator
  • plant immunity
  • pseudomonas-syringae
  • arabidopsis-thaliana

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