Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/122325
Title: EFM, A SINGLE MYB DOMAIN TRANSCRIPTION FACTOR, REPRESSES FLORAL TRANSITION IN ARABIDOPSIS THALIANA
Authors: YAN YUANYUAN
Keywords: flowering time control,MYB gene, FT
Issue Date: 22-Aug-2013
Citation: YAN YUANYUAN (2013-08-22). EFM, A SINGLE MYB DOMAIN TRANSCRIPTION FACTOR, REPRESSES FLORAL TRANSITION IN ARABIDOPSIS THALIANA. ScholarBank@NUS Repository.
Abstract: The timing of the transition from vegetative to reproductive growth in flowering plants is tightly controlled by an intricate network of multiple genetic pathways in response to various endogenous and environmental cues, which are eventually integrated by three important floral pathway integrators, LEAFY (LFY), SUPPRESSOR OF OVEREXPRESSION OF CONSTANS 1 (SOC1) and FLOWERING LOCUS T (FT). SVP and FLC form a repressor complex to directly repress SOC1 and FT expression. In order to fully elucidate the genetic network of SVP, a ChIP-chip assay was performed to identify the targets of SVP. Through ChIP-chip analysis, we identified a downstream target of SVP, EARLY FLOWERING MYB PROTEIN (EFM). Here we show that a MYB transcription factor EARLY FLOWERING MYB PROTEIN (EFM) plays an indispensable role in directly repressing the circadian rhythmic expression of FT in the leaf vasculature. EFM mediates the effect of ambient temperature on flowering and is directly promoted by another major FT repressor, SHORT VEGETATIVE PHASE. EFM interacts with an H3K36me2 demethylase JMJ30, which forms a negative feedback regulatory loop with the light-responsive circadian clock, to specifically demethylate an active mark H3K36me2 at FT. Our results suggest that EFM is an important convergence point that mediates plant responses to the interplay between temperature and light to determine the timing of reproduction.
URI: http://scholarbank.nus.edu.sg/handle/10635/122325
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