Regulation of flowering in Arabidopsis by an FLC homologue

被引:192
作者
Ratcliffe, OJ [1 ]
Nadzan, GC [1 ]
Reuber, TL [1 ]
Riechmann, JL [1 ]
机构
[1] Mendel Biotechnol, Hayward, CA 94545 USA
关键词
D O I
10.1104/pp.126.1.122
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
The Arabidopsis FLC gene encodes a MADS domain protein that acts as a repressor of flowering. Late-flowering vernalization-responsive ecotypes and mutants have high steady-state levels of FLC transcript, which decrease during the promotion of flowering by vernalization. Therefore, FLC has a central role in regulating the response to vernalization. We have isolated an Arabidopsis gene, MAF1, which encodes a protein that is closely related to FLC. Overexpression studies demonstrate that MAF1 produces comparable effects to FLC, and likely has a similar function in the regulation of flowering. In contrast to FLC, however, MAF1 expression shows a less clear correlation with the vernalization response. In addition, MAF1 overexpression does not influence FLC transcript levels. Thus, MAF1 likely acts downstream or independently of FLC transcription. We further report identification of a cluster of four additional FLC-like genes in the Arabidopsis genome.
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收藏
页码:122 / 132
页数:11
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