浙江农业学报 ›› 2023, Vol. 35 ›› Issue (7): 1511-1522.DOI: 10.3969/j.issn.1004-1524.20220895

• 作物科学 • 上一篇    下一篇

茶树NPR基因家族成员鉴定与表达分析及冷诱导CsNPR3的基因克隆

薛承进1(), 赵兰馨1, 赵德刚1,2, 黄小贞1,3,*()   

  1. 1.贵州大学 生命科学学院/农业工程研究院, 山地植物资源保护与保护种质创新教育部重点实验室, 贵州 贵阳 550025
    2.贵州省农业科学研究院,贵州 贵阳 550006
    3.贵州大学 茶学院, 贵州 贵阳 550025
  • 收稿日期:2022-06-16 出版日期:2023-07-25 发布日期:2023-08-17
  • 作者简介:薛承进(1999—),男,海南儋州人,硕士研究生,主要从事茶树发育生物学研究。E-mail: 1327466293xue@sina.cn
  • 通讯作者: *黄小贞, E-mail: xzhuang@gzu.edu.cn
  • 基金资助:
    国家自然科学基金(31960615)

Identification and expression analysis of NPR gene family members and cloning of cold-induced CsNPR3 gene in tea plants (Camellia sinensis)

XUE Chengjin1(), ZHAO Lanxin1, ZHAO Degang1,2, HUANG Xiaozhen1,3,*()   

  1. 1. The Key Laboratory of Plant Resources Conservation and Germplasm Innovation in Mountainous Region, Ministry of Education, College of Life Sciences/Agricultural Engineering Research Institute, Guizhou University, Guiyang 550025, China
    2. Guizhou Academy of Agricultural Sciences, Guiyang 550006, China
    3. College of Tea Sciences, Guizhou University, Guiyang 550025, China
  • Received:2022-06-16 Online:2023-07-25 Published:2023-08-17
  • Contact: HUANG Xiaozhen

摘要:

冷胁迫是影响茶树(Camellia sinensis) 产量和品质的主要非生物胁迫。病程相关基因非表达子(non-expresser of pathogenesis-related genes,NPRs)是植物抗病途径中的主要免疫调节蛋白。目前,茶树中NPR基因家族及其在冷响应中的作用研究相对较少。该研究首先利用生物信息学分析,在茶树基因组中筛选鉴定出3个定位于不同的染色体的NPR基因,命名为CsNPR1、CsNPR2和CsNPR3(GenBank No.ON794747)。这些基因均包含家族保守的BTB/POZ、Ankyrin 重复结构域以及多个半胱氨酸残基。进化分析发现,茶树的NPR家族成员的数量虽然与其他物种存在差异,但进化中表现出很强的保守性,与拟南芥及其他物种的分类结果相同。基因结构分析表明,茶树NPR家族与拟南芥具有相似的内含子-外显子结构。利用实时荧光定量PCR(qRT-PCR)技术,探明CsNPR1、CsNPR2和CsNPR3的组织表达模式以及对冷刺激和水杨酸(SA)的响应情况。进一步克隆被冷信号和SA信号同时诱导表达的CsNPR3,比对发现该蛋白氨基酸序列存在着品种差异性。该研究对探明茶树NPR基因家族参与冷胁迫与水杨酸的交叉调控有一定参考意义。

关键词: 茶树, 冷胁迫, NPR, 基因家族

Abstract:

Cold stress is the main abiotic stress that affects the yield and quality of tea plants (Camellia sinensis). The non-expresser of pathogenesis-related genes, NPRs are major immune regulatory proteins which have been implicated in plant disease resistance pathway. However, the function of NPR genes has not been well investigated in tea plants. In this study, we identified three members of NPR gene family which located on different tea plant chromosomes by using bioinformatics technology. They were named as CsNPR1, CsNPR2 and CsNPR3 (GenBank No. ON794747) respectively. These genes all contain highly conserved BTB/POZ domain, ankyrin repeat domain and multiple cysteine residues. Although the phylogenetic analysis showed that the number of NPR family members in tea plants was different from that of other species, it still showed highly conservation in evolution, which was the same as that of Arabidopsis and other species. Gene structure analysis showed that tea NPR family and Arabidopsis had similar exons-intron structure. Real-time fluorescent quantitative PCR (qRT-PCR) technique was used to identify the different tissue expression patterns of CsNPR1, CsNPR2 and CsNPR3, as well as their responses to cold stimulation and hormone salicylic acid (SA). Furthermore, CsNPR3, which was induced both by cold signal and SA was further cloned. It was found that there were variety differences in the amino acid sequence of the protein. This study can provide important scientific and theoretical basis for further clarifying the involvement of NPR gene family in cold stress and salicylic acid regulation in tea plants.

Key words: Camellia sinensis, cold stress, NPR, gene family

中图分类号: