A NAC transcription factor and SNI1 cooperatively suppress basal pathogen resistance in Arabidopsis thaliana.

ABSTRACT: Transcriptional repression of pathogen defense-related genes is essential for plant growth and development. Several proteins are known to be involved in the transcriptional regulation of plant defense responses. However, mechanisms by which expression of defense-related genes are regulated by repressor proteins are poorly characterized. Here, we describe the in planta function of CBNAC, a calmodulin-regulated NAC transcriptional repressor in Arabidopsis. A T-DNA insertional mutant (cbnac1) displayed enhanced resistance to a virulent strain of the bacterial pathogen Pseudomonas syringae DC3000 (PstDC3000), whereas resistance was reduced in transgenic CBNAC overexpression lines. The observed changes in disease resistance were correlated with alterations in pathogenesis-related protein 1 (PR1

SUBMITTER: Kim HS 

PROVIDER: S-EPMC3467076 | biostudies-literature | 2012 Oct

REPOSITORIES: biostudies-literature