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The NF-YC-RGL2 module integrates GA and ABA signalling to regulate seed germination in Arabidopsis.

Authors :
Liu X
Hu P
Huang M
Tang Y
Li Y
Li L
Hou X
Source :
Nature communications [Nat Commun] 2016 Sep 14; Vol. 7, pp. 12768. Date of Electronic Publication: 2016 Sep 14.
Publication Year :
2016

Abstract

The antagonistic crosstalk between gibberellic acid (GA) and abscisic acid (ABA) plays a pivotal role in the modulation of seed germination. However, the molecular mechanism of such phytohormone interaction remains largely elusive. Here we show that three Arabidopsis NUCLEAR FACTOR-Y C (NF-YC) homologues NF-YC3, NF-YC4 and NF-YC9 redundantly modulate GA- and ABA-mediated seed germination. These NF-YCs interact with the DELLA protein RGL2, a key repressor of GA signalling. The NF-YC-RGL2 module targets ABI5, a gene encoding a core component of ABA signalling, via specific CCAAT elements and collectively regulates a set of GA- and ABA-responsive genes, thus controlling germination. These results suggest that the NF-YC-RGL2-ABI5 module integrates GA and ABA signalling pathways during seed germination.

Details

Language :
English
ISSN :
2041-1723
Volume :
7
Database :
MEDLINE
Journal :
Nature communications
Publication Type :
Academic Journal
Accession number :
27624486
Full Text :
https://doi.org/10.1038/ncomms12768