Université Clermont Auvergne, INRAE, Laboratoire de Physique et Physiologie intégratives de l'Arbre en environnement Fluctuant (PIAF), 63000 Clermont-Ferrand, France.
Université de Toulouse, INRAE, CNRS, Laboratoire des Interactions Plantes Micro-organismes (LIPM), 31326 Castanet-Tolosan, France.
J Exp Bot. 2021 Apr 2;72(8):2877-2888. doi: 10.1093/jxb/erab036.
Plants memorize events associated with environmental fluctuations. The integration of environmental signals into molecular memory allows plants to cope with future stressors more efficiently-a phenomenon that is known as 'priming'. Primed plants are more resilient to environmental stresses than non-primed plants, as they are capable of triggering more robust and faster defence responses. Interestingly, exposure to various forms of mechanical stimuli (e.g. touch, wind, or sound vibration) enhances plants' basal defence responses and stress tolerance. Thus, mechanostimulation appears to be a potential priming method and a promising alternative to chemical-based priming for sustainable agriculture. According to the currently available method, mechanical treatment needs to be repeated over a month to alter plant growth and defence responses. Such a long treatment protocol restricts its applicability to fast-growing crops. To optimize the protocol for a broad range of crops, we need to understand the molecular mechanisms behind plant mechanoresponses, which are complex and depend on the frequency, intervals, and duration of the mechanical treatment. In this review, we synthesize the molecular underpinnings of plant mechanoperception and signal transduction to gain a mechanistic understanding of the process of mechanostimulated priming.
植物会记忆与环境波动相关的事件。将环境信号整合到分子记忆中，使植物能够更有效地应对未来的胁迫，这种现象被称为“预刺激”。与未预刺激的植物相比，预刺激的植物对环境胁迫更具弹性，因为它们能够引发更强大和更快的防御反应。有趣的是，暴露于各种形式的机械刺激（例如触摸、风或声音振动）会增强植物的基础防御反应和应激耐受性。因此，机械刺激似乎是一种潜在的预刺激方法，也是可持续农业中替代基于化学的预刺激的有前途的方法。根据目前可用的方法，需要重复机械处理一个月以上才能改变植物的生长和防御反应。这种长期的处理方案限制了其在快速生长作物中的适用性。为了优化适用于广泛作物的方案，我们需要了解植物机械响应背后的分子机制，这些机制很复杂，取决于机械处理的频率、间隔和持续时间。在这篇综述中，我们综合了植物机械感知和信号转导的分子基础，以深入了解机械刺激预刺激的过程。
