Plant Physiology, Dahlem Centre of Plant Sciences, Free University of Berlin, Berlin, Germany.
Plant Cell Environ. 2019 Mar;42(3):782-800. doi: 10.1111/pce.13394. Epub 2018 Sep 25.
Cold is a major stressor, which limits plant growth and development in many parts of the world, especially in the temperate climate zones. A large number of experimental studies has demonstrated that not only acclimation and entrainment but also the experience of single short stress events of various abiotic or biotic kinds (priming stress) can improve the tolerance of plants to chilling temperatures. This process, called priming, depends on a stress "memory". It does not change cold sensitivity per se but beneficially modifies the response to cold and can last for days, months, or even longer. Elicitor factors and antagonists accumulate due to increased biosynthesis or decreased degradation either during or after the priming stimulus. Comparison of priming studies investigating improved tolerance to chilling temperatures highlighted key regulatory functions of ROS/RNS and antioxidant enzymes, plant hormones, especially jasmonates, salicylates, and abscisic acid, and signalling metabolites, such as β- and γ-aminobutyric acid (BABA and GABA) and melatonin. We conclude that these elicitors and antagonists modify local and systemic cold tolerance by integration into cold-induced signalling cascades.
冷却是一种主要的胁迫因素，它限制了世界许多地区，特别是温带气候带的植物生长和发育。大量实验研究表明，不仅适应和驯化，而且各种非生物或生物胁迫（引发胁迫）的单次短期胁迫事件的经历也可以提高植物对冷胁迫的耐受性。这个过程被称为引发，它依赖于一种胁迫“记忆”。它本身不会改变植物对寒冷的敏感性，但会有益地改变对寒冷的反应，并且可以持续数天、数月甚至更长时间。引发刺激期间或之后，由于生物合成增加或降解减少，诱导因子和拮抗剂会积累。对提高植物对冷胁迫耐受性的引发研究的比较突出了 ROS/RNS 和抗氧化酶、植物激素（特别是茉莉酸、水杨酸和脱落酸）以及信号代谢物（如β-和γ-氨基丁酸（BABA 和 GABA）和褪黑素）的关键调节功能。我们得出结论，这些诱导剂和拮抗剂通过整合到冷诱导信号级联中，来调节局部和系统的耐寒性。
