HDA19 is required for the repression of salicylic acid biosynthesis and salicylic acid‐mediated defense responses in Arabidopsis

• DOI: 10.1111/j.1365-313x.2012.04977.x
• Publication Date: 2012-03-02T19:44:32Z
• Authors: Sun‐Mee Choi; Hae‐Ryong Song; Soon‐Ki Han; Muho Han; Chi‐Yeol Kim; Jaejin Park; Yong‐Hwan Lee; Jong‐Seong Jeon; Yoo‐Sun Noh; Bosl Noh
• Keywords: Pseudomonas syringae; Reprogramming; Chromatin immunoprecipitation

Summary To cope with a lifetime of exposure to variety pathogens, plants have developed exquisite and refined defense mechanisms that vary depending on the type attacking pathogen. Defense‐associated transcriptional reprogramming is central part plant mechanisms. Chromatin modification has recently been shown be another layer regulation for Here, we show RPD3/HDA1‐class histone deacetylase HDA19 involved in repression salicylic acid (SA)‐mediated responses Arabidopsis. Loss activity increased SA content expression group genes required accumulation as well pathogenesis related ( PR ) genes, resulting enhanced resistance Pseudomonas syringae . We found directly associates deacetylates histones at PR1 PR2 promoters. Thus, our study shows HDA19, by modifying chromatin repressive state, ensures low basal such , under unchallenged conditions, their proper induction without overstimulation during pathogen attacks. role might critical preventing unnecessary activation self‐destructive responses, allowing successful growth development.