水稻成花素Hd3a及其受体分子机制研究进展  

Research on Molecular Mechanism of Hd3a Florigen and Hd3a Receptor in Rice

作　　者：祁军 顾超[2] 东锐[2] 张坤[2] 崔百明[2] 黄先忠[2] 

机构地区：[1]新疆农四师农业科学研究所,新疆伊宁835000 [2]石河子大学生命科学学院,新疆石河子832003

出　　处：《安徽农业科学》2012年第20期10374-10375,10461,共3页Journal of Anhui Agricultural Sciences

基　　金：国家转基因重大专项(2008ZX08005-002)

摘　　要：成花素是有一个控制开花位点的基因FT(FLOWERING LOCUS T)编码的产物,成花素FT是植物开花途径中的关键整合因子。而水稻中的Hd3a(HEADING DATE 3a)是拟南芥FT的同源基因,Hd3a蛋白即是水稻中的成花激素,其在叶片中表达并通过微管组织运输到顶端分生组织,同成花素受体14-3-3蛋白结合,然后又附着到另一种转录因子OsFD1(FLOWERING LOCUS D)上形成成花素激活复合体,使开花基因OsMADS15功能活跃起来。文中对水稻成花素Hd3a及其受体14-3-3蛋白分子作用机制的研究进展进行了综述,为进一步研究植物开花分子生物学提供参考。Florigen is encoded by FT（FLOWERING LOCUS T）,which is a critical integrator of flowering signals pathway.Hd3a（HEADING DATE 3a） is a homologue of FT in rice,which is responsible for rice florigen.Hd3a protein translated in leaf is transported to the apical cells of shoots through vascular tissue,interacts with 14-3-3 protein acting as intracellular receptors,then binds to another transcription factor OsFD1（FLOWERING LOCUS D1）.The resultant ternary florigen activation complex activates transcription of OsMADS15 which leads to flowering.This article reviewed the recent progress on the molecular mechanism of rice Hd3a florigen and its intracellular receptors 14-3-3 protein,providing valuable information for further research of flowering molecular biology in plants.

关 键 词：成花素 水稻 成花素受体 14-3-3蛋白 

分 类 号：S188[农业科学—农业基础科学]