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    普通烟草RLP类受体蛋白家族成员的鉴定与进化、表达分析

    Genome-wide Identification and Expression Analysis of the RLPs Gene Family in Nicotiana Tabacum

    • 摘要: 类受体蛋白(receptor-like proteins, RLPs)作为一类细胞表面受体,广泛存在于高等植物中,参与调控植物生长发育和抗逆等过程。本研究以普通烟草(Nicotiana tabacum)TN90 数据库为基础,构建隐马尔科夫模型进行检索,鉴定了普通烟草RLP 家族成员;采用邻接法构建系统发育树进行系统进化分析;利用GSDS 对RLP 家族成员的基因结构进行了分析;利用普通烟草TN90 转录组数据,分析RLP 基因家族成员的表达情况;最后对普通烟草RLP 家族成员进行GO 注释分析。结果表明,在普通烟草中共鉴定出70 个RLP 家族成员,各成员的氨基酸序列长度和等电点差异较大;系统进化与基因结构分析表明,普通烟草RLP 家族成员划分为6 个亚家族,基因结构较为简单;转录组分析结果显示,RLP 基因家族成员在不同组织和发育时期的表达有较大差异,个别成员在叶片衰老时期表达量较高;GO 注释结果表明,RLPs 在植物的生长发育、逆境响应等过程中发挥作用。本研究结果将为普通烟草RLP 基因功能分析和利用奠定基础。

       

      Abstract: Receptor-like proteins (RLPs) as an important class of cell surface receptors, are present in many plant species. RLPs have been implicated in multiple biological processes including plant development and stress responses. In this study, 70 RLP family genes were identified in Nicotiana tabacum. Phylogenetic analysis was performed using the neighbor-joining method and the results showed that these RLP family members could be classified into 6 subfamilies. Transcriptome analysis revealed that the expression patterns of NtRLPs were distinct in different tissue types and at different developmental stages, with a number of genes being up-regulated in senescing leaves. GO analysis suggested that the RLP family members could be potentially involved in a number of biological processes including developmental regulation and stress responses. The results of this study could be valuable resources for future investigation of the functions of RLPs in Nicotiana tabacum.

       

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