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(A–E) Effects of drought stress on activities (Enzyme Units, EU) of superoxide dismutase, SOD (A), ascorbate peroxidase, APX, (B) glutathione reductase, GR, (C), monodehydroascorbate reductase, MDHAR (D), and dehydroascorbate reductase, DHAR (E) in leaves of A. annua. EVS, early vegetative stage; FW, fresh weight; LVS, late vegetative stage; PGS, plant growth stage; PFS, preflowering stage; FS, flowering stage; C, control; MS, moderate stress; SS, severe stress.
