Hd3a(Headingdate3a)基因是水稻开花调控途径的信息整合基因（integrator），负责将来自各种途径的开花信号汇总起来，继而诱导下游的花器官决定基因（floralorganidentitygenes）表达，从而诱导开花。研究表明，短日照诱导Hd3a在叶片中表达，然后其表达产物由叶片转运至茎尖，在那里作用于下游基因，故此产物被认为是水稻进行长距离转运的开花信号物质。但对于该信号物质是Hd3amRNA还是Hd3a蛋白，还存在一定的争议。本课题借鉴拟南芥中同源基因FT(FloweringlocusT)的研究成果设计了一系列实验，用以考察Hd3a的信号转导和作用机理。 本研究首先克...Hd3a (Heading date 3a) gene is a floral pathway integrator of rice, which integrates the information from different floral pathways and then activates the downstream floral organ identity genes leading to flowering. Hd3a can be induced by a short-day condition in leaves, where the photoperiodic signals are perceived. A previous study suggested that the expression products of Hd3a moved from leaf t...学位：理学硕士院系专业：生命科学学院生物学系_发育生物学学号：2172006115216
