The Arabidopsis SWI/SNF protein BAF60 mediates seedling growth control by modulating DNA accessibility.

ABSTRACT:

Background

Plant adaptive responses to changing environments involve complex molecular interplays between intrinsic and external signals. Whilst much is known on the signaling components mediating diurnal, light, and temperature controls on plant development, their influence on chromatin-based transcriptional controls remains poorly explored.

Results

In this study we show that a SWI/SNF chromatin remodeler subunit, BAF60, represses seedling growth by modulating DNA accessibility of hypocotyl cell size regulatory genes. BAF60 binds nucleosome-free regions of multiple G box-containing genes, opposing in cis the promoting effect of the photomorphogenic and thermomorphogenic regulator Phytochrome Interacting Factor 4 (PIF4) on hypocotyl elongation. Furthermore, BAF60 expression

SUBMITTER: Jegu T 

PROVIDER: S-EPMC5471679 | biostudies-literature | 2017 Jun

REPOSITORIES: biostudies-literature