Role of Reactive Oxygen Species in Potato's Stress Response

This study focuses on the role of reactive oxygen species (ROS) when potatoes encounter stress. ROS is a signaling molecule present in plants. When plants face external stress (such as environmental changes or pests and diseases), ROS plays an important role. However, it also has certain counter-effects. If the content of ROS in plants is too high, it will cause oxidative stress and damage cells. In order to control the amount of ROS, potatoes will activate some antioxidant enzymes, such as superoxide dismutase (SOD), catalase (CAT) and peroxidase (PRXs), which can remove excess ROS and protect cells from damage, while also making plants more resistant to stress. ROS will participate in regulating responses under stress such as drought, high salt, high or low temperature environments, as well as pathogens and leaf-eating insects. It not only helps to transmit stress signals, but also cooperates with some plant hormones (such as ABA, SA and JA) to regulate the plant's defense mechanism. Through this study, we also found that there are interactions between ROS signals and other signaling pathways (such as calcium signals). The study also discusses how to use this knowledge to improve potato's stress resistance.