Affordable Access

deepdyve-link
Publisher Website

The cold signaling attenuator HIGH EXPRESSION OF OSMOTICALLY RESPONSIVE GENE1 activates FLOWERING LOCUS C transcription via chromatin remodeling under short-term cold stress in Arabidopsis.

Authors
  • Jung, Jae-Hoon
  • Park, Ju-Hyung
  • Lee, Sangmin
  • To, Taiko Kim
  • Kim, Jong-Myong
  • Seki, Motoaki
  • Park, Chung-Mo
Type
Published Article
Journal
The Plant Cell
Publisher
American Society of Plant Biologists
Publication Date
Nov 01, 2013
Volume
25
Issue
11
Pages
4378–4390
Identifiers
DOI: 10.1105/tpc.113.118364
PMID: 24220632
Source
Medline
License
Unknown

Abstract

Exposure to short-term cold stress delays flowering by activating the floral repressor FLOWERING LOCUS C (FLC) in Arabidopsis thaliana. The cold signaling attenuator HIGH EXPRESSION OF OSMOTICALLY RESPONSIVE GENE1 (HOS1) negatively regulates cold responses. Notably, HOS1-deficient mutants exhibit early flowering, and FLC expression is suppressed in the mutants. However, it remains unknown how HOS1 regulates FLC expression. Here, we show that HOS1 induces FLC expression by antagonizing the actions of FVE and its interacting partner histone deacetylase 6 (HDA6) under short-term cold stress. HOS1 binds to FLC chromatin in an FVE-dependent manner, and FVE is essential for the HOS1-mediated activation of FLC transcription. HOS1 also interacts with HDA6 and inhibits the binding of HDA6 to FLC chromatin. Intermittent cold treatments induce FLC expression by activating HOS1, which attenuates the activity of HDA6 in silencing FLC chromatin, and the effects of intermittent cold are diminished in hos1 and fve mutants. These observations indicate that HOS1 acts as a chromatin remodeling factor for FLC regulation under short-term cold stress.

Report this publication

Statistics

Seen <100 times