Oxidative stress response in atrazine-degrading bacteria exposed to atrazine

► The changes of SOD and CAT activities indicated the presence of oxidative stress. ► Atrazine stress may occur due to imbalance of redox potential in bacterial cells. ► It indicated a mechanism that had an imbalance in ROS production versus scavenging. ► Atrazine-degrading bacteria had relatively high tolerance to atrazine stress.