Genome-Wide Identification and Expression Analysis of Cytosine DNA Methyltransferase Genes Related to Somaclonal Variation in Pineapple (Ananas comosus L.)
文献类型： 外文期刊
作者： Lin, Wenqiu 1 ; Xiao, Xi'ou 1 ; Sun, Weisheng 1 ; Liu, Shenghui 1 ; Wu, Qingsong 1 ; Yao, Yanli 1 ; Zhang, Hongna 4 ; Zhang, Xiumei 1 ;
作者机构： 1.Chinese Acad Trop Agr Sci, South Subtrop Crop Res Inst, Zhanjiang 524091, Peoples R China
2.Minist Agr, Lab Trop Fruit Biol, Zhanjiang 524091, Peoples R China
3.Acad Trop Agr Sci, Key Lab Hainan Prov Postharvest Physiol & Technol, Zhanjiang 524091, Peoples R China
4.Hainan Univ, Coll Hort, Key Lab Qual Regulat Trop Hort Crops Hainan Prov, Haikou 570228, Hainan, Peoples R China
关键词： DNA methylation; AcC5-MTase; expression profiles; somaclonal variation; pineapple
期刊名称：AGRONOMY-BASEL （ 影响因子：3.949； 五年影响因子：4.117 ）
ISSN：
年卷期： 2022 年 12 卷 5 期
页码：
收录情况： SCI
摘要： DNA methylation plays an important role in somaclonal variation. Cytosine-5 DNA methyltransferases (C5-MTases) are crucial enzymes for maintaining the de novo genome DNA methylation status, and the gene family has been identified and characterized in several species. However, limited information is available about the role of C5-MTases in the somaclonal variation of pineapple. Herein, the characteristic of DNA methylation in the leaf variants of pineapple showed that the methylation rate of variants decreased and the demethylation was mainly. Six AcC5-MTases were identified from pineapple genome. Phylogenetic analysis indicated that the six members could be classified into four subgroups, namely, AcMET, AcCMT, AcDRM, and AcDNMT, demonstrating evolutionary conservation in the C5-MTases across pineapple and other plant species. Cis-elements were presented in AcC5-MTase promoters, including light-responsive, phytohormone-responsive, and plant growth and development elements. Furthermore, we investigated the expression profiles of AcC5-MTases in different tissues and their transcript abundance in the leaves of somaclonal variation. Interestingly, most AcC5-MTase genes were highly expressed in leaf and carpopodium. AcMET, AcCMT2, and AcDRM2 were upregulated in pineapple somaclonal variants, indicating that AcC5-MTases might play an important role in the somaclonal variation of pineapple. Our results will aid in understanding the complex roles of methylation in plants and provide a basis for analyzing the role of methylation modification in the somaclonal variation of pineapple.
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