Figure 4. Relative ROS levels in the shoots and roots of Arabidopsis seedlings that were kept on KM medium with P. indica (+ lawn) or without P. indica (− lawn) for 7 d (top) or with A. brassicae (+ lawn) or without A. brassicae (− lawn) for 24 h (bottom). The ROS levels of the “– lawn” controls were set as 1.0 and the other values expressed relative to them. Based on 6 independent experiments with 20 seedlings each, bars represent SEs.