Fig. 4 | Scientific Reports

Fig. 4

From: Impact of iron sulfate (FeSO4) foliar application on growth, metabolites and antioxidative defense of Luffa cylindrica (Sponge gourd) under salt stress

Fig. 4

The effect of different concentrations of foliar application of Iron Sulfate on enzymatic antioxidant activites of sponge gourd (Luffa cylindrica) under salt stress. (A) catalases (CAT), (B) peroxidases (POD), (C) polyphenol oxidases (PPO) and (D) 2,2-Diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity. Mean values are the average of four replicates. The upper case alphabetic letters indicate significant differences (p ≤ 0.05) among treatments using Tukey’s HSD test.

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