文献类型： 外文期刊

第一作者： Xu Qing

作者： Xu Qing;He Jie;Zhang Xian;Xu Qing;Dong Jianhui;Hou Xiaojin

作者机构：

期刊名称：HORTICULTURAL PLANT JOURNAL （ 影响因子：3.032； ）

ISSN： 2095-9885

年卷期： 2018 年 4 卷 1 期

页码：

收录情况： SCI

摘要： Myeloblastosis (MYB) proteins constitute one of the largest transcription factor (TF) families in plants. They are functionally diverse in regulating plant development, metabolism, and multiple stress responses. However, the function of watermelon MYB proteins remains elusive to date. Here, a genome-wide identification of watermelon MYB TFs was performed by bioinformatics analysis. A total of 162 MYB genes were identified from watermelon (ClaMYB). A comprehensive overview of the ClaMYB genes was undertaken, including the gene structures, chromosomal distribution, gene duplication, conserved protein motif, and phylogenetic relationship. According to the analyses, the watermelon MYB genes were categorized into three groups (R1R2R3-MYB, R2R3-MYB, and MYB-related). Amino acid alignments for all MYB motifs of ClaMYBs demonstrated high conservation. Investigation of their chromosomal localization revealed that these ClaMYB genes distributed across the 11 watermelon chromosomes. Gene duplication analyses showed that tandem duplication events contributed predominantly to the expansion of the MYB gene family in the watermelon genome. Phylogenetic comparison of the ClaMYB proteins with Arabidopsis MYB proteins revealed that watermelon MYB proteins underwent a more diverse evolution after divergence from Arabidopsis. Some watermelon MYBs were found to cluster into the functional clades of Arabidopsis MYB proteins. Expression analysis under different stress conditions identified a group of watermelon MYB proteins implicated in the plant stress responses. The comprehensive investigation of watermelon MYB genes in this study provides a useful reference for future cloning and functional analysis of watermelon MYB proteins.

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