光周期途径E3泛素连接酶的开花调控机制

摘要

开花是植物生长发育过程中非常重要的一个环节，光周期是影响植物开花的主要环境因素。E3泛素连接酶对光周期依赖型的开花起着重要调控作用。已发现的光周期调控开花途径中多种组分均为E3泛素连接酶的靶蛋白，它们能通过E3泛素连接酶介导实现其泛素化降解，从而影响光周期信号，调控开花。综述了E3泛素连接酶在参与调控光受体稳定性、生物钟功能以及开花调控因子CO稳定性三个方面的研究进展。%Flowering is very important in the development of plants,and the photoperiod is a main environmental factor af-fecting plant flowering.The E3 ubiquitin ligases plays an important role in regulation of photoperiod dependent flower-ing.Some of the components in photoperiod regulated flowering pathway are the targets of E3 ubiquitin ligase,which could be degraded by E3 ubiquitin ligase-mediated pathway to regulate flowering through affecting photoperiod signal.Here,we review the function and molecular mechanism of Arabidopsis E3 ubiquitin ligases in flowering pathway in regulating photo-period dependent flowering.