拟南芥
基因
生物
基因座(遗传学)
光周期性
遗传学
抄写(语言学)
转录因子
细胞生物学
植物
突变体
语言学
哲学
作者
Young Hun Song,Robert W. Smith,Benjamin J. To,Andrew J. Millar,Takato Imaizumi
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:2012-05-25
卷期号:336 (6084): 1045-1049
被引量:399
标识
DOI:10.1126/science.1219644
摘要
Plants use day-length information to coordinate flowering time with the appropriate season to maximize reproduction. In Arabidopsis, the long day-specific expression of CONSTANS (CO) protein is crucial for flowering induction. Although light signaling regulates CO protein stability, the mechanism by which CO is stabilized in the long-day afternoon has remained elusive. Here, we demonstrate that FLAVIN-BINDING, KELCH REPEAT, F-BOX 1 (FKF1) protein stabilizes CO protein in the afternoon in long days. FKF1 interacts with CO through its LOV domain, and blue light enhances this interaction. In addition, FKF1 simultaneously removes CYCLING DOF FACTOR 1 (CDF1), which represses CO and FLOWERING LOCUS T (FT) transcription. Together with CO transcriptional regulation, FKF1 protein controls robust FT mRNA induction through multiple feedforward mechanisms that accurately control flowering timing.
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