Lämke Jörn, Bäurle Isabel
University of Potsdam, Institute for Biochemistry and Biology, Karl-Liebknecht-Strasse 24-25, 14476, Potsdam, Germany.
Genome Biol. 2017 Jun 27;18(1):124. doi: 10.1186/s13059-017-1263-6.
Plants frequently have to weather both biotic and abiotic stressors, and have evolved sophisticated adaptation and defense mechanisms. In recent years, chromatin modifications, nucleosome positioning, and DNA methylation have been recognized as important components in these adaptations. Given their potential epigenetic nature, such modifications may provide a mechanistic basis for a stress memory, enabling plants to respond more efficiently to recurring stress or even to prepare their offspring for potential future assaults. In this review, we discuss both the involvement of chromatin in stress responses and the current evidence on somatic, intergenerational, and transgenerational stress memory.
植物经常要经受生物和非生物胁迫，因而进化出了复杂的适应和防御机制。近年来，染色质修饰、核小体定位和DNA甲基化已被视为这些适应过程中的重要组成部分。鉴于其潜在的表观遗传性质，此类修饰可能为胁迫记忆提供一种机制基础，使植物能够更有效地应对反复出现的胁迫，甚至为其后代应对未来可能的攻击做好准备。在这篇综述中，我们讨论了染色质在胁迫反应中的作用以及目前关于体细胞、代际和跨代胁迫记忆的证据。
