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Effect of different treatments of MJ and arsenic (As) on (A) antioxidant enzymes activities and (B) related gene expression of superoxide dismutase (SOD), ascorbate peroxidase (APX), catalase (CAT), and peroxidase (POD) in two B. napus cultivars. Vertical bars represent the mean ± SE. Different letters indicate statistically significant differences (P ≤ 0.05) by applying Duncan’s multiple range test.
