Plants employ DNA methylation to maintain genomic plasticity that allows rapid adaptation to environmental stresses without alteration nucleotide sequence of DNA. The present investigation was carried out to detect DNA methylation changes induced by drought stress in inbred line W22 by using amplified methylation-polymorphism technique. The maize inbred line W22 encountered extensive DNA methylation variations, including hypo- and hypermethylation as a response to drought stress. Differential methylation of many genes involved in plant response to drought stress such as Antagonist of Like Heterochromatin Protein1, peptide methionine sulfoxide reductase (MSRA4), 3-isopropylmalate dehydratase large subunit 2, adenylyl cyclase-associated protein, 3-hydroxyisobutyrate dehydrogenase gene, and others was observed.

中文翻译：

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玉米自交系 W22 响应干旱胁迫的甲基化基因组胞嘧啶分析

植物利用 DNA 甲基化来维持基因组的可塑性，从而在不改变 DNA 核苷酸序列的情况下快速适应环境压力。本研究采用扩增甲基化-多态性技术检测自交系W22干旱胁迫引起的DNA甲基化变化。玉米自交系 W22 遇到了广泛的 DNA 甲基化变异，包括作为对干旱胁迫的反应的低甲基化和高甲基化。参与植物对干旱胁迫响应的许多基因的差异甲基化，例如异染色质蛋白拮抗剂、肽甲硫氨酸亚砜还原酶 (MSRA4)、3-异丙基苹果酸脱水酶大亚基 2、腺苷酸环化酶相关蛋白、3-羟基异丁酸脱氢酶基因等被观测到。