活性氧（reactive oxygen species, ROS）是植物体代谢所产生的小分子化合物，既是生长发育和防御途径的关键调节因子，又是需氧代谢的有毒副产物。植物细胞的生理过程受一个被活性氧调节的氧化还原网状途径的调控，本文从植物体内ROS产生的部位与时空特异性、ROS信号与NO和Ca²+波信号的互作等方面综述了ROS信号对植物抗性的调控作用研究进展。

Reactive oxygen species (ROS) are small molecules produced by plant metabolism which are not only key regulatory factors for growth and development as well as plant defense pathway but also the deleterious byproducts of aerobic metabolism. The physiological processes of plant cell are controlled by an oxidative and reductive network which is regulated by ROS. The study progress of ROS signal and its regulations on plant resistance to stresses from aspects of generation location, temporospatial characters，ROS signal and its interaction with NO and Ca²⁺ wave were reviewed in the paper.