巴西橡胶树核糖体蛋白HbRPL14基因逆境响应机制

Stress Responsive Mechanisms of Ribosomal Protein HbRPL14 Gene in Rubber Tree (Hevea brasiliensis )

  • 摘要: 为研究核糖体蛋白在橡胶树逆境响应中的作用机制,从巴西橡胶树品种热研7-33-97叶片中克隆了核糖体HbRPL14基因,并进行HbRPL14蛋白的生物信息学分析及HbRPL14基因的表达分析。结果表明:其编码蛋白含有特征性核糖体_L14家族结构域,该基因在橡胶树胶乳、花和叶片中表达,但在树皮中不表达。采用荧光定量分析技术证明干旱、机械伤害和白粉菌侵染均显著上调HbRPL14基因表达,表明核糖体HbRPL14基因受逆境调控,通过提高核糖体蛋白合成水平,参与橡胶树对干旱、机械伤害和白粉菌侵染的响应。

     

    Abstract: In order to study the mechanism of ribosomal protein of rubber tree in stress response,HbRPL14 gene was cloned from leaves of the rubber tree CATAS7-33-97, characteristics of bioinformatics and gene expression were analyzed. Tissue analysis showed that its coding area contained specific Ribosomal_L14 superfamily domain.The expression was highest in latex, flower and leaf, while not expressed in bark. Q-PCR analysis showed that drought, mechanical wounding and powdery mildew infection upregulated HbRPL14 expression at significantly levels. These suggested that HbRPL14 was inducted by stress environment, through increase the ribosomal protein synthesis level, play roles in physiological and molecular stress resistance in rubber tree.

     

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