Genome-wide identification of the longan R2R3-MYB gene family and its role in primary and lateral root
文献类型: 外文期刊
第一作者: Lv, Xinmin
作者: Lv, Xinmin;Tian, Shichang;Huang, Shilian;Wei, Junbin;Han, Dongmei;Li, Jianguang;Guo, Dongliang;Zhou, Yan
作者机构:
关键词: Longan; miRNAs; Root development
期刊名称:BMC PLANT BIOLOGY ( 影响因子:5.3; 五年影响因子:5.9 )
ISSN: 1471-2229
年卷期: 2023 年 23 卷 1 期
页码:
收录情况: SCI
摘要: R2R3-MYB is an important transcription factor family that regulates plant growth and development. Root development directly affects the absorption of water and nutrients by plants. Therefore, to understand the regulatory role of R2R3-MYB transcription factor family in root development of longan, this study identified the R2R3-MYB gene family members at the genome-wide level, and analyzed their phylogenetic characteristics, physical and chemical properties, gene structure, chromosome location and tissue expression. The analysis identified 124 R2R3-MYB family members in the longan genome. Phylogenetic analysis divided these members into 22 subfamilies, and the members of the unified subfamily had similar motifs and gene structures. The result of qRT-PCR showed that expression levels of DlMYB33, DlMYB34, DlMYB59, and DlMYB77 were significantly higher in main roots than in lateral as opposed to those of DlMYB35, DlMYB69, DlMYB70, and DlMYB83, which were significantly lower. SapBase database prediction and miRNAs sequencing results showed that 34 longan miRNAs could cleave R2R3-MYB, including 17 novel miRNAs unique to longan. The qRT-PCR and subcellular localization experiments of DlMYB92 and DlMYB98 showed that DlMYB92 is a key factor that regulates transcription in the nucleus and participates in the regulation of longan lateral root development. Longan also has a conserved miRNA-MYB-lateral root development regulation mechanism. This study provides a reference for further research on the transcriptional regulation of the miRNA-R2R3-MYB module in the root development of longan.
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