北柴胡成花基因的克隆及时空表达分析

Cloning and spatio-temporal expression analysis of flowering genes in Bupleurum chinense DC.

开花是植物生长发育的关键环节,本研究从北柴胡植株中克隆得到4个与成花相关的基因,分别命名为BcSVP、BcPAF1、BcCO、BcFT,并进行了同源性比对;以actin和EF-1α作为双内参,对4个基因在北柴胡植株不同器官和不同发育阶段的时空表达差异进行分析。结果表明,BcSVP主要在根中表达,相对表达量较低;BcPAF1和BcCO在不同部位均有较高表达,二者相对表达量伴随花期进程均呈先上升后缓慢下降趋势;BcFT基因主要在茎中表达,相对表达量在盛花期急剧上升。本文首次克隆并分析了与北柴胡植株成花相关4个基因的相对表达量,为解析柴胡植株成花分子调控机制奠定了基础。

In this study we isolated and cloned four flowering-related genes from Bupleurum chinense DC.,named BcSVP,BcPAF1,BcCO,and BcFT.Actin and EF-1αwere used as double internal standards to analyze the spatial and temporal differences in the expression of four genes in different tissues and flowering stages of Bupleurum chinense DC.qRT-PCR analysis showed that the BcSVP gene was mainly expressed in root,and its relatively expression level was low.BcPAF1 and BcCO were both highly expressed in different parts,and their relative expression level showed an increasing trend and then slowly decreasing with the flowering development process.BcFT was mainly expressed in the stem,and the relatively expression level was increased sharply in the flowering stage.In summary,four genes related to flowering of Bupleurum chinense DC.were cloned and their relative expression levels were characterized,laying a foundation for elucidating the molecular mechanisms that regulate the flowering stage of Bupleurum chinense.