CAT and infection: To confirm a decrease in ROS accumulation, we next assayed the expression levels of selected genes involved in the ROS signaling pathway [e.g., catalase (TaCAT) and superoxide dismutase (TaSOD)] in TaARPC3-knockdown plants following infection with Pst. As shown in Figure 7C, we observed an increase in the accumulation of TaCAT in TaARPC3-knockdown plants compared with mock-inoculated or BSMV:γ control plants.