Tang Minqiang, Liu Le, Hu Xu, Zheng Haoyue, Wang Zukai, Liu Yi, Zhu Qing, Cui Licao, Xie Shangqian
Key Laboratory of Genetics and Germplasm Innovation of Tropical Special Forest Trees and Ornamental Plants (Ministry of Education), School of Forestry, Hainan University, Haikou, China.
College of Bioscience and Engineering, Jiangxi Agricultural University, Nanchang, China.
Front Plant Sci. 2023 Mar 2;14:1142562. doi: 10.3389/fpls.2023.1142562. eCollection 2023.
Sandalwood () is a high-value multifunctional tree species that is rich in aromatic substances and is used in medicine and global cosmetics. Due to the scarcity of land resources in tropical and subtropical regions, land in temperate regions is a potential resource for the development of S. album plantations in order to meet the needs of production and medicine. The R2R3-MYB transcription factor family is one of the largest in plants and plays an important role in the response to various abiotic stresses. However, the R2R3-MYB gene family of has not been studied. In this study, 144 R2R3-MYB genes were successfully identified in the assembly genome sequence, and their characteristics and expression patterns were investigated under various durations of low temperature stress. According to the findings, 31 of the 114 R2R3-MYB genes showed significant differences in expression after cold treatment. Combining transcriptome and weighted gene co-expression network analysis (WGCNA) revealed three key candidate genes (, , and ) to be significantly involved in the regulation of cold resistance in . The structural characteristics, evolution, and expression pattern of the R2R3-MYB gene in were systematically examined at the whole genome level for the first time in this study. It will provide important information for future research into the function of the R2R3-MYB genes and the mechanism of cold stress response in .
檀香（）是一种高价值的多功能树种，富含芳香物质，用于医药和全球化妆品行业。由于热带和亚热带地区土地资源稀缺，温带地区的土地是发展檀香人工林以满足生产和医药需求的潜在资源。R2R3-MYB转录因子家族是植物中最大的家族之一，在应对各种非生物胁迫中发挥重要作用。然而，檀香的R2R3-MYB基因家族尚未得到研究。在本研究中，在组装的基因组序列中成功鉴定出144个R2R3-MYB基因，并研究了它们在不同低温胁迫持续时间下的特征和表达模式。根据研究结果，114个R2R3-MYB基因中的31个在冷处理后表达有显著差异。结合转录组和加权基因共表达网络分析（WGCNA）发现三个关键候选基因（、和）显著参与檀香抗寒调控。本研究首次在全基因组水平系统研究了檀香R2R3-MYB基因的结构特征、进化和表达模式。这将为未来研究檀香R2R3-MYB基因的功能和冷胁迫响应机制提供重要信息。
