FLC基因表达在植物春化过程中的作用

The Function of FLC in Vernalization Process

在对以往有关不同开花途径研究简要总结的基础上综述了FLC基因在春化过程中的作用。近期以拟南芥不同生态型和突变体为模式的研究结果表明基因FLC可能是春化反应的关键基因。研究发现 ,FLC的表达水平与植株低温处理的时间呈数量关系 ,低温处理时间越长 ,FLC的表达越弱 ,去甲基化也可能对FLC起负调控的作用。同时FLC也存在于自主开花途径中 ,与其他基因共同作用以调节植株开花时间。而FLC的表达对开花起抑制作用。一系列研究表明 ,春化的低温作用可能在于相关基因的去甲基化 ,消除了FLC对开花的抑制作用 ,从而解除赤霉素合成途径的封锁最终导致植株在一定时期开花。

The lately researches of the function of FLC in the process of vernalization are reviewed in this article on the basis of summarizing various pathways those promote flowering. The research in Arabidopsis shows that FLC may play a key role in the response to vernalization. It also plays an important role in the autonomous pathway. The level of FLC determines the extent of the vernalization response in the promotion of flowering and there is a quantitative relationship between the duration of cold treatment and the extent of down_regulation of FLC activity. Longer cold treatment can reduce the level of FLC . Also demethylation can downregulate the expression of FLC . The series researches showed that vernalization may unlock the biosynthesis of GA by demethylating relational genes and promote flowering.