A previous stress exposure may result in a faster or stronger response when plants are challenged again by a stress event. This capacity of plants to “remember” a past stress and to respond in a different way to multiple stress exposures is called memory response. Despite the mechanisms promoting the plant memory response to abiotic stresses are not completely elucidated, a growing body of evidence has pointed to chromatin remodeling as an important memory mechanism. Additionally, transcriptomic studies have helped to clarify the transcriptional memory types and relevant functional classes of genes and pathways that potentially exhibit a memory behavior. This review focuses on the main concepts related to plant memory responses to abiotic stresses, especially drought which is by far the major environmental stress impairing crop production. We also review the main advances on the mechanisms underlying the plant stress memory responses such as the role of ABA and chromatin remodeling mechanisms. The most recent advances promoted by transcriptomic approaches are also highlighted.

中文翻译：

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使用转录组学评估植物的逆境记忆

当植物再次受到胁迫事件的挑战时，先前的胁迫暴露可能会导致更快或更强的响应。植物“记忆”过去的胁迫并以不同的方式对多重胁迫的反应的这种能力称为记忆反应。尽管尚未完全阐明促进植物对非生物胁迫响应的机制，但越来越多的证据表明染色质重塑是重要的记忆机制。此外，转录组学研究有助于弄清转录记忆类型以及可能表现出记忆行为的基因和途径的相关功能类别。这篇综述着重于与植物对非生物胁迫的反应有关的主要概念，特别是干旱，干旱是迄今为止影响作物产量的主要环境胁迫。我们还回顾了植物胁迫记忆反应的基础机制方面的主要进展，例如ABA的作用和染色质重塑机制。还强调了转录组学方法所促进的最新进展。