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草业学报 ›› 2024, Vol. 33 ›› Issue (11): 106-122.DOI: 10.11686/cyxb2023490

• 研究论文 • 上一篇    

紫花苜蓿BZR基因家族鉴定及其对非生物胁迫的响应分析

黎泽斌2(), 邱永争2, 刘延杰2, 喻金秋1, 王柏吉1, 刘千宁1, 王月1,2(), 崔国文1()   

  1. 1.东北农业大学动物科学技术学院,黑龙江 哈尔滨 150030
    2.东北农业大学园艺园林学院,黑龙江 哈尔滨 150030
  • 收稿日期:2023-12-19 修回日期:2024-02-14 出版日期:2024-11-20 发布日期:2024-09-09
  • 通讯作者: 王月,崔国文
  • 作者简介:cgw603@163.com
    E-mail: wangyue280786@neau.edu.cn
    黎泽斌(2001-),男,广东东莞人,在读硕士。E-mail: lzb20010805@163.com
  • 基金资助:
    国家重点研发计划专项(2022ZD040120401);国家自然科学基金项目(32301487)

Identification of the BZR gene family in alfalfa and analysis of its transcriptional responses to abiotic stress

Ze-bin LI2(), Yong-zheng QIU2, Yan-jie LIU2, Jin-qiu YU1, Bai-ji WANG1, Qian-ning LIU1, Yue WANG1,2(), Guo-wen CUI1()   

  1. 1.College of Animal Science and Technology,Northeast Agricultural University,Harbin 150030,China
    2.College of Horticulture and Landscape Architecture,Northeast Agricultural University,Harbin 150030,China
  • Received:2023-12-19 Revised:2024-02-14 Online:2024-11-20 Published:2024-09-09
  • Contact: Yue WANG,Guo-wen CUI

摘要:

油菜素内酯(brassinosteroid, BR)是一类类固醇激素,影响植物的各种发育和生理过程。油菜素唑抗性(BRASSINAZOLE-RESISTANT, BZR)转录因子(transcription factors)家族是油菜素内酯生物合成的正调节因子。BZR基因家族在植物生长发育的调节中发挥重要作用,同时参与多种抗逆功能。然而,在有“牧草之王”美誉的紫花苜蓿中,BZR基因家族的研究较少。本研究中,鉴定到紫花苜蓿共14个BZR基因,并且用生物信息学手段对其蛋白质理化性质、二级结构和三级结构、基因在染色体的定位、紫花苜蓿与相似物种的系统发育、基因结构、保守结构域、启动子顺式作用元件、基因之间共线性关系、BZR基因家族在6个不同组织中的表达量以及它们对非生物胁迫的响应进行分析,发现14个BZR家族的基因在紫花苜蓿6个组织中均有表达,分别有9、7、7个基因响应冷、盐、干旱胁迫,其中有3个基因(MsBZR05MsBZR06MsBZR12)对这3种胁迫都有响应。本研究为进一步探究BZR基因家族提供了候选基因。

关键词: BZR基因家族, 紫花苜蓿, 生物信息学分析, 非生物胁迫, 表达分析

Abstract:

Brassinosteroids (BRs) are a class of steroid hormones that influence various developmental and physiological processes in plants. Members of the BRASSINAZOLE-RESISTANT (BZR) transcription factor family are positive regulators of brassinosteroid biosynthesis. The BZR gene family plays a crucial role in regulating plant growth and development, including various aspects of stress resistance. However, the BZR gene family in alfalfa (Medicago sativa), which is known as the ‘king of forages’, has not been thoroughly studied. In this study, we identified 14 BZR genes in alfalfa, and used bioinformatics tools to analyze the physicochemical properties and secondary and tertiary structures of their encoded proteins. The chromosomal locations, phylogenetic relationships, structures, conserved domains, promoter cis-acting elements, gene family interactions, and transcript levels of the 14 genes in six different tissues of alfalfa, as well as their transcriptional responses to abiotic stresses, were also determined. We found that all 14 BZR genes were expressed in various tissues of alfalfa, with nine genes responding to cold stress, seven responding to salt stress, and seven genes responding drought stress. Notably, three BZR genes (MsBZR05MsBZR06and MsBZR12) responded to all three types of stress. The results of this study highlight candidate genes for further research on the BZR gene family.

Key words: BZR gene family, Medicago sativa, bioinformatics analysis, abiotic stress, expression analysis