Genome-wide survey, characterization, and expression analysis of bZIP transcription factors inChenopodium quinoa

文献类型： 外文期刊

第一作者： Li, Feng

作者： Li, Feng;Liu, Jianxia;Guo, Xuhu;Yin, Lili;Zhang, Hongli;Li, Feng;Yin, Lili;Zhang, Hongli;Wen, Riyu

作者机构：

关键词： Quinoa (Chenopodium quinoa); bZIP transcription factor family; Phylogenetic classification; Evolutionary analysis; Gene expression patterns

期刊名称：BMC PLANT BIOLOGY （ 影响因子：4.215； 五年影响因子：4.96 ）

ISSN： 1471-2229

年卷期： 2020 年 20 卷 1 期

页码：

收录情况： SCI

摘要： Background Chenopodium quinoaWilld. (quinoa) is a pseudocereal crop of the Amaranthaceae family and represents a promising species with the nutritional content and high tolerance to stressful environments, such as soils affected by high salinity. The basic leucine zipper (bZIP) transcription factor represents exclusively in eukaryotes and can be related to many biological processes. So far, the genomes of quinoa and 3 other Amaranthaceae crops (Spinacia oleracea,Beta vulgaris, andAmaranthus hypochondriacus) have been fully sequenced. However, information about thebZIPsin these Amaranthaceae species is limited, and genome-wide analysis of thebZIPfamily is lacking in quinoa. Results We identified 94bZIPsin quinoa (named asCqbZIP1-CqbZIP94). All theCqbZIPswere phylogenetically splitted into 12 distinct subfamilies. The proportion ofCqbZIPswas different in each subfamily, and members within the same subgroup shared conserved exon-intron structures and protein motifs. Besides, 32 duplicatedCqbZIPgene pairs were investigated, and the duplicatedCqbZIPshad mainly undergone purifying selection pressure, which suggested that the functions of the duplicatedCqbZIPsmight not diverge much. Moreover, we identified thebZIPmembers in 3 other Amaranthaceae species, and 41, 32, and 16 orthologous gene pairs were identified between quinoa andS. oleracea,B. vulgaris, andA. hypochondriacus, respectively. Among them, most were a single copy being present inS. oleracea,B. vulgaris, andA. hypochondriacus, and two copies being present in allotetraploid quinoa. The function divergence within thebZIPorthologous genes might be limited. Additionally, 11 selectedCqbZIPshad specific spatial expression patterns, and 6 of 11CqbZIPswere up-regulated in response to salt stress. Among the selectedCqbZIPs, 3 of 4 duplicated gene pairs shared similar expression patterns, suggesting that these duplicated genes might retain some essential functions during subsequent evolution. Conclusions The present study provided the first systematic analysis for the phylogenetic classification, motif and gene structure, expansion pattern, and expression profile of thebZIPfamily in quinoa. Our results would lay an important foundation for functional and evolutionary analysis of CqbZIPs, and provide promising candidate genes for further investigation in tissue specificity and their functional involvement in quinoa's resistance to salt stress.

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