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The Arabidopsis Floral Repressor BFT Delays Flowering by Competing with FT for FD Binding under High Salinity

Cited 40 time in Web of Science Cited 45 time in Scopus
Authors
Ryu, Jae Yong; Lee, Hyo-Jun; Seo, Pil Joon; Jung, Jae-Hoon; Ahn, Ji Hoon; Park, Chung-Mo
Issue Date
2014-02
Citation
Molecular Plant, Vol.7 No.2, pp.377-387
Keywords
ArabidopsisBFTFDflowering timeFTsalt stress
Abstract
Soil salinity is one of the most serious agricultural problems that significantly reduce crop yields in the arid and semi-arid regions. It influences various phases of plant growth and developmental processes, such as seed germination, leaf and stem growth, and reproductive propagation. Salt stress delays the onset of flowering in many plant species. We have previously reported that the Arabidopsis BROTHER OF FT AND TFL1 (BFT) acts as a floral repressor under salt stress. However, the molecular mechanisms underlying the BFT function in the salt regulation of flowering induction is unknown. In this work, we found that BFT delays flowering under high salinity by competing with FLOWERING LOCUS T (FT) for binding to the FD transcription factor. The flowering time of FD-deficient fd-2 mutant was insensitive to high salinity. BFT interacts with FD in the nucleus via the C-terminal domain of FD, which is also required for the interaction of FD with FT, and interferes with the FT-FD interaction. These observations indicate that BFT constitutes a distinct salt stress signaling pathway that modulates the function of the FT-FD module and possibly provides an adaptation strategy that fine-tunes photoperiodic flowering under high salinity.
ISSN
1674-2052
URI
https://hdl.handle.net/10371/171998
DOI
https://doi.org/10.1093/mp/sst114
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College of Natural Sciences (자연과학대학)Dept. of Chemistry (화학부)Journal Papers (저널논문_화학부)
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