Identification of Candidate Auxin Response Factors Involved in Pomegranate Seed Coat Development

文献类型： 外文期刊

第一作者： Yu, Li'ang

作者： Yu, Li'ang;Liu, Chunyan;Li, Jiyu;Jia, Botao;Qi, Xiaoxiao;Qin, Gaihua;Yu, Li'ang;Ming, Ray;Liu, Chunyan;Li, Jiyu;Jia, Botao;Qi, Xiaoxiao;Qin, Gaihua;Ming, Ray

作者机构：

关键词： auxin response factor; gene expression; gene family evolution; phylogenetics; seed coat development

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.753； 五年影响因子：6.612 ）

ISSN： 1664-462X

年卷期： 2020 年 11 卷

页码：

收录情况： SCI

摘要： Auxin response factors (ARFs) are transcription factors, regulating the auxin signaling pathways involved in plant development and related processes. In this study, we performed the genome-wide identification and characterization ofARFs in pomegranate and compared them withARFs from three other species. Seventeen PgrARFs were identified and clustered into four groups, according to their phylogenetic relationship with the remaining 59 ARFs. A recent whole-genome duplication event in pomegranate may have contributed to the expansion and diversification ofPgrARFs. Genomic truncation and variant splicing mechanisms contributed to the divergence ofPgrARFs, a conclusion that was supported by different exon-intron structures of genes and incomplete conserved domains of PgrARFs in a specific phylogenetic group (group III). Interestingly, the absence of motifs from certainPgrARFgenes corresponded to their low transcription levels, which contrasted to the highly expressedPgrARFs with intact motifs. Specifically,PgrARF1andPgrARF2highly expressed in both inner and outer seed coat, and phylogenetically related toArabidopsisorthologs which mediates cell divisions in seed coat. We infer these twoPgrARFsmight involve in seed coat development through cell divisions in response to auxin regulation. These findings provided information on the characteristics and evolutionary relationships ofPgrARFs, but also shed lights on their potential roles during seed coat development in pomegranate.

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