Sorbonne Université, CNRS, Laboratoire de Biologie du Développement, F-75005 Paris, France.
Biochem J. 2019 Oct 30;476(20):3019-3032. doi: 10.1042/BCJ20190159.
Reactive oxygen species (ROS) are versatile compounds which can have toxic or signalling effects in a wide range living organisms, including seeds. They have been reported to play a pivotal role in the regulation of seed germination and dormancy but their mechanisms of action are still far from being fully understood. In this review, we sum-up the major findings that have been carried out this last decade in this field of research and which altogether shed a new light on the signalling roles of ROS in seed physiology. ROS participate in dormancy release during seed dry storage through the direct oxidation of a subset of biomolecules. During seed imbibition, the controlled generation of ROS is involved in the perception and transduction of environmental conditions that control germination. When these conditions are permissive for germination, ROS levels are maintained at a level which triggers cellular events associated with germination, such as hormone signalling. Here we propose that the spatiotemporal regulation of ROS production acts in concert with hormone signalling to regulate the cellular events involved in cell expansion associated with germination.
活性氧（ROS）是一种多功能化合物，在包括种子在内的广泛生物体内具有毒性或信号作用。已有报道称，ROS 在调控种子萌发和休眠中发挥关键作用，但它们的作用机制仍远未完全阐明。在这篇综述中，我们总结了过去十年在这一研究领域取得的主要发现，这些发现共同揭示了 ROS 在种子生理学中的信号作用。ROS 通过对生物分子的子集的直接氧化，参与种子干燥储存过程中休眠的释放。在种子吸胀过程中，ROS 的受控产生参与了对控制萌发的环境条件的感知和转导。当这些条件有利于萌发时，ROS 水平保持在触发与萌发相关的细胞事件的水平，例如激素信号转导。在这里，我们提出 ROS 产生的时空调节与激素信号协同作用，以调节与萌发相关的细胞扩展相关的细胞事件。
