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. 2014 Mar 20;9(3):e91957. doi: 10.1371/journal.pone.0091957

Figure 5. Antioxidant enzyme activities under different nitrogen concentrations.

Figure 5

A–C) Spectrophotometric enzymatic assays for catalase (CAT), ascorbate peroxidase (APX) and superoxide dismutase (SOD). Data demonstrate the mean values of triplicates ±1 SE.