欢迎访问《草业学报》官方网站,今天是 分享到:

草业学报 ›› 2022, Vol. 31 ›› Issue (7): 111-121.DOI: 10.11686/cyxb2021215

• 研究论文 • 上一篇    

全基因组水平蒺藜苜蓿CPP基因家族的鉴定及表达模式分析

田骄阳(), 王秋霞, 郑淑文, 刘文献()   

  1. 兰州大学草地农业生态系统国家重点实验室,兰州大学农业农村部草牧业创新重点实验室,兰州大学草地农业教育部工程研究中心,兰州大学草地农业科技学院,甘肃 兰州 730020
  • 收稿日期:2021-05-24 修回日期:2021-08-26 出版日期:2022-07-20 发布日期:2022-06-01
  • 通讯作者: 刘文献
  • 作者简介:E-mail: liuwx@lzu.edu.cn
    田骄阳(2000-),女,吉林吉林人,在读本科。E-mail: tianjy18@lzu.edu.cn
  • 基金资助:
    甘肃省自然科学基金项目(20JR10RA622);国家自然科学基金项目(31502000)

Genome-wide identification and expression profile analysis of the CPP gene family in Medicago truncatula

Jiao-yang TIAN(), Qiu-xia WANG, Shu-wen ZHENG, Wen-xian LIU()   

  1. State Key Laboratory of Grassland Agro-ecosystems,Key Laboratory of Grassland Livestock Industry Innovation,Ministry of Agriculture and Rural Affairs,Engineering Research Center of Grassland Industry,Ministry of Education,College of Pastoral Agriculture Science and Technology,Lanzhou University,Lanzhou 730020,China
  • Received:2021-05-24 Revised:2021-08-26 Online:2022-07-20 Published:2022-06-01
  • Contact: Wen-xian LIU

摘要:

CPP (cysteine-rich polycomb-like protein)基因家族是一类小转录因子,广泛存在于除酵母与原核生物外的各种生物体中,在植物生长发育及响应胁迫过程中具有重要作用。截至目前,CPP基因家族已在多个物种中被鉴定和研究,但在豆科模式植物蒺藜苜蓿中还未见报道。本研究采用生物信息学的方法,在蒺藜苜蓿中共鉴定出9个CPP基因。通过与3个物种CPP基因的蛋白序列构建系统发育树,将CPP基因分为3类,MtCPP成员与大豆的亲缘关系更接近。保守结构域分析表明MtCPP转录因子都具有1~2个CXC保守结构域。染色体定位分析得出,9个CPP基因分布在6条染色体上,并鉴定出2对旁系同源基因,均来源于片段重复事件。通过基因芯片技术检测MtCPP基因的表达模式结果显示,MtCPP基因的表达具有一定的时空特异性。MtCPP基因启动子中含有大量与激素以及胁迫相关的顺式作用元件,并且MtCPP2MtCPP5MtCPP6MtCPP7基因具有响应干旱的表达特征,MtCPP2MtCPP8基因具有响应盐胁迫的功能。该研究可为后期深入解析MtCPP基因家族功能和筛选参与苜蓿抗逆的MtCPP基因奠定基础。

关键词: CPP, 转录因子, 蒺藜苜蓿, 表达分析, 非生物胁迫

Abstract:

The CPP (cysteine-rich polycomb-like protein) gene family is one category of small transcription factors occurring in a wide range of organisms, excepting yeasts and prokaryotes, and which play an important role in plant growth and development and in response to stress processes. The CPP gene family has been identified and studied in many species but so far no research in the model legume species Medicago truncatula has been reported. In this study, 9 CPP genes were identified in M. truncatula by bioinformatics. By constructing phylogenetic trees with the CPP protein sequences of three species, CPP genes could be divided into three categories. The genetic relationship between MtCPP members and soybean was closer. Conserved domain analysis showed that MtCPP transcription factors all had 1-2 CXC conserved domains. Chromosome mapping analysis found that 9 CPP genes were distributed on 6 chromosomes, and two pairs of paralogous genes were identified, which both derived from fragment duplication events. Combining these results with the analysis of gene chip expression database of M. truncatula, the expression of MtCPP genes had certain temporal and spatial specificity. MtCPP gene promoters contain a large number of cis acting elements related to hormone signalling and stress, MtCPP2,MtCPP5, MtCPP6 and MtCPP7 genes have expression characteristics of response to drought, and MtCPP2 and MtCPP8 genes may be involved in salt stress response. This study provides a research foundation for further functional analysis and screening of MtCPP genes involved in stress resistance in alfalfa.

Key words: CPP, transcription factor, Medicago truncatula, expression analysis, abiotic stress