中文摘要：

开花是植物从营养生长到生殖生长的一个重要转折点。花启动的时机对生殖生长的成功至关重要。开花时间受内在因子和环境因子的共同调节。通过对拟南芥的分子遗传学研究，确定至少存在4条调控开花时间的信号途径，即光周期途径、春化途径、自主途径和赤霉素途径。文章简要综述了近年来在拟南芥（Arabidopsis thaliana）开花时间调控领域的研究进展。

英文摘要：

The transition from vegetative to reproductive growth is the major developmental switch in plant life cycle. The timing of flower initiation is critical for a successful reproduction. Flowering is regulated by endogenous and environmental signals. Molecular genetic studies on Arabidopsis thaliana revealed four major flowering pathways： the photoperiod, the vernalization, the autonomous, and the gibberellin pathways. This paper reviews some research progresses in control of flowering time in Arabidopsis.