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草业学报 ›› 2024, Vol. 33 ›› Issue (7): 53-67.DOI: 10.11686/cyxb2023334

• 研究论文 • 上一篇    下一篇

小麦及其祖先物种Hsp70基因家族鉴定与表达分析

吴毅1(), 冯雅岚2, 王添宁1, 琚吉浩1, 肖慧淑1, 马超1, 张均1()   

  1. 1.河南科技大学农学院,河南 洛阳 471000
    2.武昌理工学院生命科学学院,湖北 武汉 430000
  • 收稿日期:2023-09-14 修回日期:2023-11-15 出版日期:2024-07-20 发布日期:2024-04-08
  • 通讯作者: 张均
  • 作者简介:E-mail: zhangjun0105@126.com
    吴毅(2000-),男,河南焦作人,在读硕士。E-mail: wuyi20001030@163.com
  • 基金资助:
    国家自然科学基金(32372227);河南省自然科学基金(222300420430);河南省高等学校青年骨干教师培养计划(2021GGJS050)

Genome-wide identification and expression analysis of the Hsp70 gene family in wheat and its ancestral species

Yi WU1(), Ya-lan FENG2, Tian-ning WANG1, Ji-hao JU1, Hui-shu XIAO1, Chao MA1, Jun ZHANG1()   

  1. 1.Agronomy College,Henan University of Science and Technology,Luoyang 471000,China
    2.College of Life Science,Wuchang University of Technology,Wuhan 430000,China
  • Received:2023-09-14 Revised:2023-11-15 Online:2024-07-20 Published:2024-04-08
  • Contact: Jun ZHANG

摘要:

热激蛋白70(heat shock protein 70, Hsp70)在植物发育过程以及响应生物和非生物胁迫中起着重要作用。为探究小麦Hsp70基因家族进化关系、功能以及表达模式,本研究对乌拉尔图小麦、拟斯卑尔脱山羊草、二粒小麦、粗山羊草以及普通小麦的Hsp70基因进行全面的生物信息学分析,并通过RT-qPCR方法分析其部分Hsp70基因在不同外源激素和环境胁迫条件下的表达模式。结果表明,从乌拉尔图小麦、拟斯卑尔脱山羊草、二粒小麦、粗山羊草和普通小麦5个物种中,分别鉴定出30、41、60、28和94个Hsp70基因;系统发育分析表明5个物种Hsp70家族成员分为5个亚家族组,每组成员数量不相等,其中大部分成员分布在第Ⅰ组,且同一亚家族中大多数的Hsp70成员具有相似的基因结构和保守基序;进一步综合分析5个物种Hsp70基因的染色体定位和重复事件,发现Hsp70基因在5个物种的各染色体上分布不均匀,此外从5个物种中共发现12个串联重复事件和110个片段复制事件,表明片段复制事件促进了小麦Hsp70基因家族的扩张;顺式作用元件分析表明,5个物种Hsp70基因的启动子区域存在多种光响应元件、逆境响应元件、激素响应元件以及生长发育调节元件;此外RT-qPCR结果表明,5个物种部分Hsp70基因在不同激素处理和逆境胁迫下具有不同程度的响应,在高温和干旱胁迫下,所选8个Hsp70基因均上调表达。小麦及其祖先物种Hsp70基因的鉴定及其进化过程为进一步研究Hsp70基因在小麦生长发育过程中的功能以及在逆境胁迫下的响应机制提供理论基础。

关键词: 小麦, Hsp70基因家族, 生物信息学分析, 表达模式

Abstract:

Heat shock protein 70 (Hsp70) exerts a crucial influence on plant development and response to biotic and abiotic stresses. In order to explore the evolutionary relationships, functions and expression patterns of the Hsp70 gene family in wheat (Triticum aestivum), this study conducted a comprehensive bioinformatics analysis of the Hsp70 gene family in Triticum urartuAegilops speltoidesTriticum turgidumAegilops tauschii and common wheat, and the expression patterns of some Hsp70 genes under different exogenous hormones and environmental stress were analyzed by RT-qPCR. The results showed that, respectively, from the five species, 30, 41, 60, 28 and 94 Hsp70 genes were identified. Phylogenetic analysis showed that the members of the Hsp70 family in the five species were divided into 5 subfamily groups, and the number of members in each group was not equal. Most of the members are distributed in Group I, and most of the Hsp70 members in the same subfamily have similar gene structures and conserved motifs. Further comprehensive analysis of chromosome localization and repetition events of the Hsp70 gene in the five species revealed that the Hsp70 gene was unevenly distributed on each of the chromosomes, and a total of 12 tandem repeat events and 110 fragment replication events were found from the five species, indicating that fragment replication events promoted the expansion of the Hsp70 gene family in wheat. The analysis of cis-acting elements showed that there were various light response elements, stress response elements, hormone response elements and growth as well as development regulatory elements in the promoter region of Hsp70 gene in the five wheat species. In addition, RT-qPCR results indicated that particular Hsp70 genes in the five wheat species had varying degrees of response under different hormone treatments and stress. The expression of eight Hsp70 genes was up-regulated under high temperature and drought stress. The identification of the Hsp70 gene in wheat and its ancestral species and elucidation of its evolution provides a theoretical basis for further research on the function of the Hsp70 gene in wheat growth and development, as well as its response mechanism under stress.

Key words: wheat, Hsp70 gene family, bioinformatics analysis, expression patterns