Figure 4.

Determination of antioxidant enzymes in the Ascorbate-glutathione (AsA-GSH cycle). (A,B) ascorbate peroxidase (APX); (C,D) glutathione reductase (GR); (E,F) dehydroascorbate reductase (DHAR) and (G,H) monodehydroascorbate reductase (MDHAR) activity in leaves and roots of Aikangqing and Qibaoqing. The leaves and roots of three seedlings were separately collected in one replication and three independent biological replications were performed. Different letters indicates significant differences (p < 0.05). Units of these enzyme activity, U·mg⁻¹protein·min⁻¹.