Epigenetic Environmental Memories in Plants: Establishment, Maintenance, and Reprogramming

First author: Yuehui He; Affiliations: Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences (中国科学院分子植物科学卓越创新中心): Shanghai, China

Corresponding author: Yuehui He

Plants are immobile (固定的) and must respond to or endure fluctuating surroundings and diverse environmental challenges. Environmental inputs often induce chromatin modifications at various responsive genes and consequent changes in their expression. Environment-induced chromatin marks at certain loci are transmittable through cell divisions after relief from the original external signals, leading to acquired ‘memorization’ of environmental experiences in plants, namely epigenetic environmental memories, which enable plants to adapt to environmental changes or to perform better when events recur (重现). Here, we review recent progress in epigenetic or chromatin-mediated environmental memories in plants, including defense priming, stress memories, and ‘epigenetic memory of winter cold’ or vernalization. Various advances in epigenetic mechanisms underlying plant-environment interactions highlight that plant environmental epigenetics is emerging as an important area in plant biology.

植物不会移动，因此必须忍受其周围环境的变动及各种极端环境的胁迫。环境信号通常会诱导多种响应基因的染色质修饰，并最终改变这些基因的表达。由环境诱导的特定位点上的染色质修饰在外部环境信号消失后可以通过细胞分裂进行传递，因此植物对其所经历的环境获得了某种“记忆”，这使得植物能够适应环境的变化或者在相关事件重复发生时能够有更好的表现。本文综述了近年来有关植物中表观或染色质介导的环境记忆的最新研究进展，包括防御预防、胁迫记忆以及寒冬或春化的表观记忆。植物与环境互作潜在表观遗传机制的研究进展说明植物环境表观学正成为植物生物学研究中一门非常重要的领域。

通讯：何跃辉  (http://sourcedb.sibs.cas.cn/zw/rck/201507/t20150714_4393186.html)

个人简介：1997-2001年，美国肯塔基大学，植物生理学博士；2001-2005年，美国威斯康星大学麦迪逊分校，博士后。

研究方向：植物花期调控的分子与表观遗传机理，植物发育表观遗传学。

doi: https://doi.org/10.1016/j.tig.2018.07.006

Journal: Trends in Genetics

Published date: 01 November, 2018

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