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首页> 外文期刊>Journal of Experimental Botany >Winter-dormant shoot apical meristem in poplar trees shows environmental epigenetic memory
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Winter-dormant shoot apical meristem in poplar trees shows environmental epigenetic memory

机译：杨树树的冬季休闲射击顶端公司显示环境表观遗忘记忆

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摘要

Trees have a long lifespan and must continually adapt to environmental pressures, notably in the context of climate change. Epigenetic mechanisms are doubtless involved in phenotypic plasticity and in stress memory; however, little evidence of the role of epigenetic processes is available for trees growing in fields. Here, we analyzed the possible involvement of epigenetic mechanisms in the winter-dormant shoot apical meristem of Populus x euramericana clones in memory of the growing conditions faced during the vegetative period. We aimed to estimate the range of genetic and environmentally induced variations in global DNA methylation and to evaluate their correlation with changes in biomass production, identify differentially methylated regions (DMRs), and characterize common DMRs between experiments. We showed that the variations in global DNA methylation between conditions were genotype dependent and correlated with biomass production capacity. Microarray chip analysis allowed detection of DMRs 6 months after the stressful summer period. The 161 DMRs identified as common to three independent experiments most notably targeted abiotic stress and developmental response genes. Results are consistent with a winter-dormant shoot apical meristem epigenetic memory of stressful environmental conditions that occurred during the preceding summer period. This memory may facilitate tree acclimation.
机译：树木的寿命长，必须不断适应环境压力，特别是在气候变化的背景下。毫无疑问是表型可塑性和压力记忆中的表观遗传机制;然而，几乎没有表现出肌肉过程的作用的证据可用于种植在田地中的树木。在这里，我们分析了表观遗传机制在冬季休眠射击顶端植物中的可能参与杨树X Euremericana克隆的植物，以记忆营养期间的生长条件。我们旨在估算全局DNA甲基化的遗传和环境诱导的变化范围，并评估它们与生物质产生的变化的相关性，鉴定差异甲基化区域（DMR），并表征实验之间的常见DMR。我们表明，条件之间的全局DNA甲基化的变化是基因型依赖性和与生物质生产能力相关的基因型。微阵列芯片分析允许在压力夏季后6个月检测DMRS。鉴定为三个独立实验的161个DMR，最常见的是靶向非生物应激和发育反应基因。结果与冬季休眠射击顶端单位的脑膜内肌肌肌肌肌肌细胞内记忆一致，这是前夏季期间发生的压力环境条件。此内存可以促进树驯化。

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