Genome-Wide Identification, Characterization, and Expression Analysis of the NAC Transcription Factor in Chenopodium quinoa
文献类型： 外文期刊
作者： Li, Feng 1 ; Guo, Xuhu 1 ; Liu, Jianxia 1 ; Zhou, Feng 1 ; Liu, Wenying 1 ; Wu, Juan 1 ; Zhang, Hongli 1 ; Cao, Huifen 1 ; S 1 ;
作者机构： 1.Shanxi Datong Univ, Coll Life Sci, Datong 037009, Peoples R China
2.Shanxi Datong Univ, Res & Dev Ctr, Agr Facil Technol, Datong 037009, Peoples R China
3.Shanxi Acad Agr Sci, Maize Res Inst, Xinzhou 034000, Peoples R China
关键词： quinoa (Chenopodium quinoa); NAC transcription factor family; phylogenetic analysis; gene expression patterns
期刊名称：GENES （ 影响因子：4.096； 五年影响因子：4.339 ）
ISSN： 2073-4425
年卷期： 2019 年 10 卷 7 期
页码：
收录情况： SCI
摘要： The NAC (NAM, ATAF, and CUC) family is one of the largest families of plant-specific transcription factors. It is involved in many plant growth and development processes, as well as abiotic/biotic stress responses. So far, little is known about the NAC family in Chenopodium quinoa. In the present study, a total of 90 NACs were identified in quinoa (named as CqNAC1-CqNAC90) and phylogenetically divided into 14 distinct subfamilies. Different subfamilies showed diversities in gene proportions, exon-intron structures, and motif compositions. In addition, 28 CqNAC duplication events were investigated, and a strong subfamily preference was found during the NAC expansion in quinoa, indicating that the duplication event was not random across NAC subfamilies during quinoa evolution. Moreover, the analysis of Ka/Ks (non-synonymous substitution rate/synonymous substitution rate) ratios suggested that the duplicated CqNACs might have mainly experienced purifying selection pressure with limited functional divergence. Additionally, 11 selected CqNACs showed significant tissue-specific expression patterns, and all the CqNACs were positively regulated in response to salt stress. The result provided evidence for selecting candidate genes for further characterization in tissue/organ specificity and their functional involvement in quinoa's strong salinity tolerance.
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