These authors contributed equally to this work.
Imitation Switch chromatin remodeling factors and their interacting RINGLET proteins act together in controlling the plant vegetative phase in Arabidopsis
Article first published online: 24 JUL 2012
© 2012 The Authors. The Plant Journal © 2012 Blackwell Publishing Ltd
The Plant Journal
Volume 72, Issue 2, pages 261–270, October 2012
How to Cite
Li, G., Zhang, J., Li, J., Yang, Z., Huang, H. and Xu, L. (2012), Imitation Switch chromatin remodeling factors and their interacting RINGLET proteins act together in controlling the plant vegetative phase in Arabidopsis. The Plant Journal, 72: 261–270. doi: 10.1111/j.1365-313X.2012.05074.x
- Issue published online: 16 OCT 2012
- Article first published online: 24 JUL 2012
- Accepted manuscript online: 13 JUN 2012 11:21AM EST
- Received 23 February 2012; revised 24 May 2012; accepted 11 June 2012; published online 24 July 2012.
- chromatin remodeling;
- vegetative phase;
- Arabidopsis thaliana
During their life cycle, flowering plants must experience a transition from vegetative to reproductive growth. Here, we report that double mutations in the Arabidopsis thaliana IMITATION SWITCH (AtISWI) genes, CHROMATIN REMODELING11 (CHR11) and CHR17, and the plant-specific DDT-domain containing genes, RINGLET1 (RLT1) and RLT2, resulted in plants with similar developmental defects, including the dramatically accelerated vegetative-to-reproductive transition. We demonstrated that AtISWI physically interacts with RLTs in preventing plants from activating the vegetative-to-reproductive transition early by regulating several key genes that contribute to flower timing. In particular, AtISWI and RLTs repress FT, SEP1, SEP3, FUL, and SOC1, but promote FLC in the leaf. Furthermore, AtISWI and RLTs may directly repress FT and SEP3 through associating with the FT and SEP3 loci. Our study reveals that AtISWI and RLTs represent a previously unrecognized genetic pathway that is required for the maintenance of the plant vegetative phase.