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草业学报 ›› 2026, Vol. 35 ›› Issue (7): 117-134.DOI: 10.11686/cyxb2025302

• 研究论文 • 上一篇    

紫花苜蓿AP2亚家族基因鉴定、生信分析及MsBBM基因克隆

陈奋奇1,2(), 张金青1(), 禹一箭1, 李振宇1   

  1. 1.宁夏大学林业与草业学院,宁夏 银川 750021
    2.甘肃农业大学草业学院,甘肃 兰州 730070
  • 收稿日期:2025-07-17 修回日期:2025-09-22 出版日期:2026-07-20 发布日期:2026-05-21
  • 通讯作者: 张金青
  • 作者简介:Corresponding author. E-mail: 18893816768@163.com
    陈奋奇(1994-),男,甘肃平凉人,在读博士。E-mail: 18893115958@163.com
  • 基金资助:
    宁夏自然科学基金(2024AAC03095);宁夏高等学校科学研究项目(NYG2024-045)

Identification, bioinformatics analysis of AP2 subfamily genes and MsBBM gene cloning in alfalfa

Fen-qi CHEN1,2(), Jin-qing ZHANG1(), Yi-jian YU1, Zhen-yu LI1   

  1. 1.College of Forestry and Prataculture,Ningxia University,Yinchuan 750021,China
    2.Pratacultural College,Gansu Agricultural University,Lanzhou 730070,China
  • Received:2025-07-17 Revised:2025-09-22 Online:2026-07-20 Published:2026-05-21
  • Contact: Jin-qing ZHANG

摘要:

AP2亚家族转录因子属于AP2/ERF超家族,参与调节植物生长发育的各种生物学过程。然而,对紫花苜蓿AP2亚家族及BBM的研究未见报道。本研究基于紫花苜蓿全基因组数据,采用HMMER鉴定了10个AP2基因,其中仅有一个BBM基因,对10个AP2成员进行生信和表达分析。结果发现,AP2成员均属于不稳定、亲水的非分泌蛋白,理化性质多样,二、三级结构特异;基序分析显示,AP2基因具有保守性,含有特定的结构域,如仅BBM含有bbm-1结构域,同时含有生长发育、植物激素响应及生物和非生物胁迫响应的顺式调控元件,表明MsAP2成员具有调控植物生长发育和应对逆境胁迫的作用;表达模式分析表明,MsAP2在不同器官的表达具有多样性和特异性,具有调节紫花苜蓿生长发育的潜在功能。进一步克隆MsBBM基因,明确其编码蛋白定位于细胞核。研究结果为后续探究AP2亚家族基因在紫花苜蓿生长发育中的作用提供了参考依据,也为揭示MsBBM基因的功能提供了研究基础。

关键词: 紫花苜蓿, AP2转录因子, BBM基因, 生长发育, 胁迫响应

Abstract:

The AP2 subfamily transcription factors belong to the AP2/ERF superfamily and are involved in regulating various biological processes related to plant growth and development. However, there have been no reports to our knowledge on the AP2 subfamily or BBM genes in alfalfa (Medicago sativa). In this study, based on whole-genome data of M. sativa, ten AP2 genes were identified using HMMER, among which only one was a BBM gene. Bioinformatics and expression analyses were conducted on the ten AP2 members. The results showed that all AP2 members were unstable, hydrophilic, non-secretory proteins with diverse physicochemical properties and specific secondary and tertiary structures. Motif analysis revealed that AP2 genes were conserved and contain characteristic domains; For instance, only the BBM gene possesses the bbm-1 domain. Additionally, the promoter regions of these genes contained various cis-acting elements related to growth and development, plant hormone responses, and both biotic and abiotic stress responses, indicating that MsAP2 members may play roles in regulating plant development and stress adaptation. Expression pattern analysis by qRT-PCR further demonstrated that MsAP2 genes exhibit tissue-specific and diverse expression profiles, suggesting their potential functions in the growth and development of alfalfa. Further cloning of the MsBBM gene confirmed that its encoded protein is localized in the nucleus. These findings provide a reference for future investigations into the roles of AP2 subfamily genes in the growth and development of alfalfa, and lay a foundation for elucidating the function of the MsBBM gene.

Key words: alfalfa, AP2 transcription factor, BBM gene, growth and development, stress response