Plants acquire enhanced tolerance to intermittent abiotic stress by employing information obtained during prior exposure to an environmental disturbance, a process known as acclimation or defense priming. The capacity for stress memory is a critical feature in this process. The number of reports related to plant stress memory (PSM) has recently increased, but few studies have focused on the mechanisms that maintain PSM. Identifying the components involved in maintaining PSM is difficult due in part to the lack of clear criteria to recognize these components. In this review, based on what has been learned from genetic studies on heat acclimation memory, we propose criteria for identifying components of the regulatory networks that maintain PSM. We provide examples of the regulatory circuits formed by effectors and regulators of PSM. We also highlight strategies for assessing PSMs, update the progress in understanding the mechanisms of PSM maintenance, and provide perspectives for the further development of this exciting research field.

反复胁迫过程中驯化的启动、诱导、记忆和输出

植物维持胁迫记忆启动的调控网络

由植物胁迫记忆启动形成的两类转录记忆

 摘 要 

植物会利用先前暴露于胁迫环境下所获得的信息，来增强对间歇性非生物胁迫的抗性，该过程即所谓的驯化或者防御启动。胁迫记忆的能力对于植物的非生物胁迫驯化至关重要。最近，有关植物胁迫记忆相关的研究报道有所增多，但是很少有研究聚焦于植物胁迫记忆维持的机制。鉴定参与植物胁迫记忆维持的组分比较困难，部分是因为缺乏鉴定这些组分的标准。本综述中，作者基于已知的关于热驯化以及的遗传学研究结果，提出了用于鉴定参与植物胁迫记忆维持的调控网络关键组分的标准。作者提供了一个由植物胁迫记忆维持的效应子和调控子组成的调控回路。作者重点突出了评估植物胁迫记忆维持的策略，更新了有关植物胁迫记忆维持机制的理解，并描绘了未来该领域的研究前景。