*4.8. Measurements of Reactive Oxygen Species (ROS) Content and Enzyme Activity*

To better understand the function of *ZmWRKY106* under drought treatment, we assessed the activities of superoxide dismutase (SOD), peroxide dismutase (POD), catalase (CAT) and the ROS content in WT and transgenic lines at 0, 4, 12 and 24 h after drought stress. The ROS content and the activities of SOD, POD, and CAT were measured as previously described [19]. To obtain reproducible results, each experiment was repeated three times. Values are means ±SD and statistically significant differences were based on the Student's test.
