【摘要】 目的克隆红花WD40(CtWD40)转录因子,分析其在不同组织间的表达水平及与红花羟基黄色素含量的相关性。方法以红花花瓣转录组WD40候选基因为参考,克隆获得CtWD40基因序列。同时对该转录因子保守结构域、蛋白三维结构及系统发育等内容进行生物信息学分析,荧光定量PCR方法研究了该基因在红花不同组织中基因表达差异,并采用HPLC法测定红花各花期花瓣中羟基红花黄色素A含量。结果成功克隆CtWD40基因并且发现该蛋白序列中8个保守WD结构域,通过系统发育分析发现CtWD40与菊科WD40蛋白亲缘关系最近。结论 CtWD40基因在在不同花期花瓣组织中出现先升高后降低表达趋势,皮尔森相关系数分析揭示CtWD40在花瓣中基因表达水平与羟基黄花黄色素A含量具有显著相关性。更多还原

【Abstract】 Objective To clone CtWD40 transcription factors(TFs) and analyze its expression level in different tissues of Carthamus tinctorius and relationship with the content of hydroxysafflor yellow A(HSYA). Methods CtWD40 gene was obtained by cloning the WD40 candidate gene from transcriptome of C. tinctorius as reference. Its conserved domain, three-dimensional structure and phylogeny analysis were analyzed by bioinformatics methods. The CtWD40 expression pattern was also analyzed by qRT-PCR method, in the same time,HSYA content in different petals were analyzed by HPLC. Results Gene sequence of CtWD40 was obtained and eight conserved WD domains were found in CtWD40 gene sequences. Phylogenetic analysis revealed that CtWD40 had a closed homology with WD40 from composite plants. Conclusion The expression of CtWD40 gene was first increased and then decreased in petal tissues of different flowering stages.Pearson coefficient revealed significant correlation between CtWD40 expression and HSYA content in C. tinctorius petal.更多还原