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A membrane-associated NAC transcription factor regulates salt-responsive flowering via FLOWERING LOCUS T in Arabidopsis

Cited 146 time in Web of Science Cited 158 time in Scopus
Authors
Kim, Sang-Gyu; Kim, Sun-Young; Park, Chung-Mo
Issue Date
2007-08
Citation
Planta, Vol.226 No.3, pp.647-654
Keywords
ArabidopsisFLOWERING LOCUS Tflowering timeNACsalt stress
Abstract
The plant-specific NAC (NAM, ATAF1/2, CUC2) transcription factors play regulatory roles in diverse developmental processes and stress responses. Notably, a subset of the NAC members, collectively designated NTLs, is membrane-associated, suggesting that membrane-mediated regulation would be an important molecular scheme functioning in rapid transcriptional responses to external stimuli. Here, we examined the physiological role of a salt-responsive NTL, NTL8, by molecular genetic and transgenic approaches. NTL8 is expressed as a membrane-associated, dormant form and subsequently processed into a transcriptionally active, nuclear form. Transgenic plants overproducing an active NTL8 form exhibited delayed flowering as well as reduced growth with small curled leaves. Accordingly, expression of FLOWERING LOCUS T (FT) and its downstream genes was significantly reduced in the transgenic plants. Furthermore, FT was significantly repressed by high salt. We therefore propose that NTL8 mediates salt-responsive flowering via FT in Arabidopsis.
ISSN
0032-0935
URI
https://hdl.handle.net/10371/172092
DOI
https://doi.org/10.1007/s00425-007-0513-3
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College of Natural Sciences (자연과학대학)Dept. of Chemistry (화학부)Journal Papers (저널논문_화학부)
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