光周期途径调控多年生草本植物成花诱导分子机理的研究

高等植物的成花诱导（floral induction）具有多样性。一年生模式植物拟南芥至少存在5条成花诱导途径，即春化途径、光周期途径、赤霉素途径、自主途径和年龄途径。与此相比，多年生植物的成花诱导调控机理的研究才刚刚起步。弯曲碎米荠（欧洲亚种，Cardamine flexuosa），属十字花科碎米荠属，为多次开花多年生草本植物。前期研究表明，在弯曲碎米荠中，年龄和春化途径共同调控了弯曲碎米荠的初次开花时间。本课题拟在此基础上，通过遗传学、反向遗传学和比较发育生物学等方法研究光周期途径在弯曲碎米荠成花诱导中的贡献和相关分子机理。本课题的研究将对我们深入理解高等植物开花多样性和环境适应性提供重要理论基础。

Flowering time is highly diversified between perennial and annual plants. In the annual model Arabidopsis thaliana, five flowering time pathways (age, autonomous, gibberellin, photoperiod and vernalization) have been identified. Cardamine flexuosa, a member of the Brassicaceae, is a herbaceous polycarpic perennial species. It has been shown that age and vernalization pathways cooperatively regulate flowering time in C. flexuosa. However, the contributions of other flowering time pathways are poorly understood. We propose a project to investigate the roles of photoperiod in flowering time in C. flexuosa.