Whole-Genome Bisulfite Sequencing (WGBS) Analysis of Under High-Temperature Stress Conditions

Overview

Journal Genes (Basel)

Publisher MDPI

Date 2024 Oct 26

PMID 39457365

Authors

Zhaolong Gong

Juyun Zheng

Ni Yang

Xueyuan Li

Shuaishuai Qian

Fenglei Sun

Shiwei Geng

Yajun Liang

Junduo Wang

Affiliations

Soon will be listed here.

Abstract

Background: DNA methylation is an important part of epigenetic regulation and plays an important role in the response of plants to adverse stress.

Methods: In this study, whole-genome bisulfite sequencing (WGBS) was performed on the high-temperature-resistant material Xinluzao 36 and the high-temperature-sensitive material Che 61-72 at 0 h and 12 h under high-temperature stress conditions.

Results: The results revealed that the methylation levels of CG and CHG (H = A, C, or T) decreased after the high-temperature stress treatment, and the methylation level of the A subgenome was significantly greater than that of the D subgenome. The methylation level of CHH increased, and the methylation level of CHH in the D subgenome was significantly greater than that in the A subgenome after high-temperature stress treatment. The methylation density of CG is lower than that of CHG and CHH, and the methylation density of the middle region of chromosomes is greater than that of both ends, which is opposite to the distribution density of genes. There were 124 common differentially methylated genes in the CG, CHG, and CHH groups, and 5130 common DEGs and differentially methylated genes were found via joint analysis with RNA-seq; these genes were significantly enriched in the biosynthesis of plant hormones, thiamine metabolism, glutathione metabolism, and tyrosine metabolism pathways. DNA methylation did not affect the expression of many genes (accounting for 85.68% of the differentially methylated genes), DNA methylation-promoted gene expression was located mainly in the downstream region of the gene or gene body, and the expression of inhibitory genes was located mainly in the upstream region of the gene.

Conclusions: This study provides a theoretical basis for further exploration of the gene expression and functional regulatory mechanism of DNA methylation under high-temperature stress conditions.

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