Fig. 3

Effect of individual and combined application of IAA and compost on antioxidant activities i.e., (A) Catalase (CAT; nmol min^− 1 mg^− 1 protein), (B) Ascorbate peroxidase (APX; nmol ascorbate oxidized min^− 1), (C) Peroxidase (POD; mmol CO₂ mol^− 1 H₂O), and (D) Superoxide dismutase (SOD; nmol min^− 1 mg^− 1 protein) under Ni stress. Bars displaying same alphabets are statistically non-significant at P < 0.05