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Genome-Wide Identification and Analysis of DNA Methyltransferase and Demethylase Gene Families in Sweet Potato and Its Diploid Relative

文献类型： 外文期刊

作者： Yang, Songtao 1 ; Qiao, Shuai 2 ; Yang, Yan 1 ; Wang, Fang 2 ; Song, Wei 2 ; Tan, Wenfang 2 ; Li, Yongping 4 ; Zhu, Youlin 1 ;

作者机构： 1.Nanchang Univ, Coll Life Sci, Nanchang 330031, Peoples R China

2.Sichuan Acad Agr Sci, Sichuan Germplasm Resources Ctr, Crop Res Inst, Chengdu 610066, Peoples R China

3.Environmentally Friendly Crop Germplasm Innovat &, Chengdu 610066, Peoples R China

4.Hainan Univ, Sch Breeding & Multiplicat, Sanya Inst Breeding & Multiplicat, Sanya 572025, Peoples R China

5.Hainan Univ, Sch Trop Agr & Forestry, Key Lab Qual Regulat Trop Hort Crops Hainan Prov, Haikou 570228, Peoples R China

关键词： sweet potato; DNA methylation; C5-MTase; dMTase; storage root development

期刊名称：PLANTS-BASEL （ 影响因子：4.1； 五年影响因子：4.5 ）

ISSN： 2223-7747

年卷期： 2025 年 14 卷 11 期

页码：

收录情况： SCI

摘要： DNA methylation is a conserved and vital epigenetic modification that plays essential roles in plant growth, development, and responses to environmental stress. Cytosine-5 DNA methyltransferases (C5-MTases) and DNA demethylases (dMTases) are key regulators of DNA methylation dynamics. However, a comprehensive characterization of these gene families in sweet potato has remained elusive. In this study, we systematically identified and analyzed eight C5-MTase and five dMTase genes in the genomes of diploid (Ipomoea trifida, 2n = 2x = 30) and autohexaploid (Ipomoea batatas, 2n = 6x = 90) sweet potato. Phylogenetic, structural, and synteny analyses revealed a high degree of conservation among these genes, suggesting their essential roles during evolution. Promoter analysis uncovered multiple cis-acting elements, particularly those responsive to light and hormones. In addition, we examined the expression profiling of IbC5-MTases and IbdMTases genes during storage root development, revealing that several were highly expressed during the early and rapid expansion stages. These findings suggest that C5-MTases and dMTases may contribute to the regulation of storage root formation in sweet potato through epigenetic mechanisms, offering valuable insights for future functional studies and epigenetic breeding efforts.

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