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Genome-wide identification and expression analysis of the WRKY transcription factor family in flax (Linum usitatissimum L.)

文献类型： 外文期刊

作者： Yuan, Hongmei 1 ; Guo, Wendong 2 ; Zhao, Lijuan 1 ; Yu, Ying 3 ; Chen, Si 1 ; Tao, Lei 4 ; Cheng, Lili 1 ; Kang, Qinghua; 1 ;

作者机构： 1.Heilongjiang Acad Agr Sci, Harbin 150086, Peoples R China

2.Heilongjiang Acad Sci, Inst Nat Resources & Ecol, Harbin 150040, Peoples R China

3.Guizhou Univ Tradit Chinese Med, Sch Basic Med, Guiyang 550025, Peoples R China

4.Northeast Forestry Univ, Coll Life Sci, Harbin 150040, Peoples R China

关键词： Flax; Transcription factor; WRKY; Phylogenetic analysis; Expression patterns

期刊名称：BMC GENOMICS （ 影响因子：3.969； 五年影响因子：4.478 ）

ISSN： 1471-2164

年卷期： 2021 年 22 卷 1 期

页码：

收录情况： SCI

摘要： BackgroundMembers of the WRKY protein family, one of the largest transcription factor families in plants, are involved in plant growth and development, signal transduction, senescence, and stress resistance. However, little information is available about WRKY transcription factors in flax (Linum usitatissimum L.).ResultsIn this study, comprehensive genome-wide characterization of the flax WRKY gene family was conducted that led to prediction of 102 LuWRKY genes. Based on bioinformatics-based predictions of structural and phylogenetic features of encoded LuWRKY proteins, 95 LuWRKYs were classified into three main groups (Group I, II, and III); Group II LuWRKYs were further assigned to five subgroups (IIa-e), while seven unique LuWRKYs (LuWRKYs 96-102) could not be assigned to any group. Most LuWRKY proteins within a given subgroup shared similar motif compositions, while a high degree of motif composition variability was apparent between subgroups. Using RNA-seq data, expression patterns of the 102 predicted LuWRKY genes were also investigated. Expression profiling data demonstrated that most genes associated with cellulose, hemicellulose, or lignin content were predominantly expressed in stems, roots, and less in leaves. However, most genes associated with stress responses were predominantly expressed in leaves and exhibited distinctly higher expression levels in developmental stages 1 and 8 than during other stages.ConclusionsUltimately, the present study provides a comprehensive analysis of predicted flax WRKY family genes to guide future investigations to reveal functions of LuWRKY proteins during plant growth, development, and stress responses.

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