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草业学报 ›› 2022, Vol. 31 ›› Issue (9): 168-182.DOI: 10.11686/cyxb2021347

• 研究论文 • 上一篇    

藜麦WRKY基因的进化与多胁迫条件下的转录应答

侯丽媛1(), 贾举庆2, 姜晓东2, 王育川1, 赵菁1, 陈禺怀3, 黄胜雄4(), 吴慎杰1(), 董艳辉1()   

  1. 1.山西农业大学生命科学学院,山西 太原 030031
    2.山西农业大学农学院,山西 晋中 030801
    3.华中师范大学数学与统计学院,湖北 武汉 430079
    4.合肥工业大学食品与生物工程学院,安徽 合肥 230009
  • 收稿日期:2021-09-14 修回日期:2021-12-15 出版日期:2022-09-20 发布日期:2022-08-12
  • 通讯作者: 黄胜雄,吴慎杰,董艳辉
  • 作者简介:Corresponding author. E-mail: dongfang5513@163.com
    Corresponding author. E-mail: 307277432@qq.com
    Corresponding author. E-mail: huang_shenghsiung@163.com
    侯丽媛(1973-),女,山西太原人,博士。E-mail: houliyuan0131@163.com
  • 基金资助:
    山西省重点研发(农业)一般项目(201903D221085);山西省科技成果转化引导专项(201904D131033);山西农业大学生物育种工程项目(YZGC135)

The evolution, characterization and transcriptional responses to multiple stresses of the WRKY genes in Chenopodium quinoa

Li-yuan HOU1(), Ju-qing JIA2, Xiao-dong JIANG2, Yu-chuan WANG1, Jing ZHAO1, Yu-huai CHEN3, Sheng-xiong HUANG4(), Shen-jie WU1(), Yan-hui DONG1()   

  1. 1.College of Life Sciences,Shanxi Agricultural University,Taiyuan 030031,China
    2.College of Agronomy,Shanxi Agricultural University,Jinzhong 030801,China
    3.School of Mathematics Statistics,Central China Normal University,Wuhan 430079,China
    4.School of Food and Biological Engineering,Hefei University of Technology,Hefei 230009,China
  • Received:2021-09-14 Revised:2021-12-15 Online:2022-09-20 Published:2022-08-12
  • Contact: Sheng-xiong HUANG,Shen-jie WU,Yan-hui DONG

摘要:

WRKY转录因子参与调控植物生长发育和多种胁迫应答,是一类非常重要的植物转录因子。为解析藜麦WRKY基因的进化特征及挖掘响应胁迫的WRKY基因,本研究利用系统的生物信息学方法在全基因组水平对WRKY基因进行了鉴定,并对其染色体定位、分组、系统进化、共线性分析以及多胁迫条件下的表达模式进行了分析。藜麦基因组中鉴定得到90个WRKY基因;划分为3组:Ⅰ组(18个)、Ⅱ组(46个)和Ⅲ组(12个),其中Ⅱ组成员进一步被划分为5个亚组:Ⅱ-a(9个),Ⅱ-b(4个),Ⅱ-c(13个),Ⅱ-d(10个)和Ⅱ-e(10个)。另外,14个WRKY成员因为WRKYGQK短肽的缺失,以及锌指结构变异较大而未划分到任何分组。本研究分组与藜麦WRKY基因进化树中家族成员的聚类结果完全一致,进一步支持了成员分组的可靠性。此外,不同分组的WRKY成员的蛋白序列呈现出小组特异的氨基酸保守域组成。藜麦和祖先二倍体苍白茎藜、瑞典藜的同源基因组模块分析表明,藜麦WRKY基因数目的增加主要来自全基因组倍增。在干旱、高温、盐、低磷胁迫和花生褪绿扇形斑病毒(GCFSV)侵染下,大量WRKY基因的表达水平被显著性诱导或抑制,说明这些WRKY基因很可能参与了调控藜麦的逆境应答反应。研究结果可为藜麦的抗逆研究提供优良的候选WRKY基因,为藜麦的抗逆研究提供参考依据。

关键词: 藜麦, WRKY, 进化, 胁迫, 转录应答

Abstract:

The WRKYs are important plant transcription factors, which regulate growth and development, and responses to various stresses in plants. The aim of the research was to elucidate evolutionary links and explore ways to exploit the stress responsive members of the WRKY gene family in Chenopodium quinoa. Systematic bioinformatics methods were used to identify the genome-wide occurrence of WRKY genes in C. quinoa, determine their chromosomal location, classification and systematic evolutionary affinities, conduct synteny analysis and measure expression profiles under different stresses. In total, 90 WRKY genes were identified in the genome of C. quinoa. These were classified as group Ⅰ (18 members), group Ⅱ (46) and group Ⅲ (12). Fourteen WRKY family members could not be assigned to a group due to the lack of WRKYGQK peptide and dramatic variation of the zinc finger. The members of group Ⅱ were further assigned to five subgroups: Ⅱ-a (9), Ⅱ-b (4), Ⅱ-c (13), Ⅱ-d (10) and Ⅱ-e (10). A compiled phylogenetic tree identified WRKY gene clusters that were consistent with the WRKY gene classification, further supporting the accuracy of our classification of WRKY member genes. Additionally, the protein sequences of WRKY member genes from different groups revealed group-specific conserved domains. The syntenic genomic regions between C. quinoaChenopodium pallidicaule and Chenopodium suecicum demonstrated that the WRKY gene expansion in C. quinoa resulted from the whole genome duplication of C. quinoa. Under drought, heat, salt and low P, and groundnut chlorotic fan-spot virus (GCFSV) infection stresses, the expression levels of a number of WRKY genes were significantly down- or up-regulated, implying these WRKY genes participate in regulating the responses to these biotic and abiotic stresses. Our results indicate good gene candidates and provide reference information for future studies of stress tolerance in C. quinoa.

Key words: Chenopodium quinoa, WRKY, evolution, stress, transcriptional response