Fig. 6.

Effects of sucrose feeding on ROS accumulation, ROS scavenging enzymes and Rubisco activities. Seedlings aged 14 d were subjected to control (1 mM NH₄⁺), high NH₄⁺ (20 mM) or high NH₄⁺+ suc (20 mM NH₄⁺ + 1% sucrose) treatments for 24 h. a Total ROS accumulation represented by fluorescence degrees, b GSH content, c-g Enzymes activity assays for c GST, d CAT, e POD, f SOD and g Rubisco. Experimental conditions were the same as described in Fig. 5. Data were expressed as means ± SE of three independent replicates. Letters on the bars represented statistical significances