Analyses of the NAC Transcription Factor Gene Family in Gossypium raimondii Ulbr.: Chromosomal Location, Structure, Phylogeny, and Expression Patterns
文献类型: 外文期刊
第一作者: Haihong Shang
作者: Haihong Shang ;Wei Li;Changsong Zou;Youlu Yuan
作者机构:
关键词: Cotton;expression patterns;NAC;phylogeny;structure
期刊名称:Journal of Integrative Plant Biology ( 影响因子:7.061; 五年影响因子:6.002 )
ISSN: 1672-9072
年卷期: 2013 年 55 卷 7 期
页码:
收录情况: CSCD
摘要: NAC domain proteins are plant-specific transcription factors known to play diverse roles in various plant developmental processes. In the present study, we performed the first comprehensive study of the NAC gene family in Gossypium raimondii Ulbr., incorporating phylogenetic, chromosomal location, gene structure, conserved motif, and expression profiling analyses. We identified 145 NAC transcription factor (NAC-TF) genes that were phylogenetically clustered into 18 distinct subfamilies. Of these, 127 NAC-TF genes were distributed across the 13 chromosomes, 80 (55%) were preferentially retained duplicates located in both duplicated regions and six were located in triplicated chromosomal regions. The majority of NAC-TF genes showed temporal-, spatial-, and tissue-specific expression patterns based on transcriptomic and qRT-PCR analyses. However, the expression patterns of several duplicate genes were partially redundant, suggesting the occurrence of sub-functionalization during their evolution. Based on their genomic organization, we concluded that genomic duplications contributed significantly to the expansion of the NAC-TF gene family in G. raimondii. Comprehensive analysis of their expression profiles could provide novel insights into the functional divergence among members of the NAC gene family in G. raimondii.
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