Transcriptional 'memory' of a stress: transient chromatin and memory (epigenetic) marks at stress-response genes
Transcriptional 'memory' of a stress: transient chromatin and memory (epigenetic) marks at stress-response genes
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DOI：
10.1111/tpj.12832
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发表时间：
2015-07-01
期刊：
影响因子：
7.2
通讯作者：
Avramova, Zoya
中科院分区：
文献类型：
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作者：
Avramova, Zoya
干旱、盐度、极端温度变化、病原体和食草动物的攻击是植物一生中反复经历的环境压力。为了在反复的压力下生存，植物提供的反应可能与它们第一次遇到压力时的反应不同。对类似压力的不同反应代表了“压力记忆”的概念。生物体、细胞和基因/基因组水平的协调反应被认为通过提高植物的耐受性/回避能力来增加生存机会。最终，应激记忆可能提供了一种驯化和适应的机制。在分子水平上，应激记忆的概念表明，在重复应激过程中负责记忆型转录的机制不是基于第一次应激激活的相同反应途径的重复激活。本文讨论了近年来在寻找转录“记忆因子”方面的一些进展，重点讨论了拟南芥超诱导脱水应激记忆反应基因。
Drought, salinity, extreme temperature variations, pathogen and herbivory attacks are recurring environmental stresses experienced by plants throughout their life. To survive repeated stresses, plants provide responses that may be different from their response during the first encounter with the stress. A different response to a similar stress represents the concept of 'stress memory'. A coordinated reaction at the organismal, cellular and gene/genome levels is thought to increase survival chances by improving the plant's tolerance/ avoidance abilities. Ultimately, stress memory may provide a mechanism for acclimation and adaptation. At the molecular level, the concept of stress memory indicates that the mechanisms responsible for memory-type transcription during repeated stresses are not based on repetitive activation of the same response pathways activated by the first stress. Some recent advances in the search for transcription 'memory factors' are discussed with an emphasis on super-induced dehydration stress memory response genes in Arabidopsis.