Activity of enzymes^a.

Combinations	Catalase activity (U mg−1 protein)	Guaiacol peroxidase activity (U mg−1 protein)	Polyphenyl oxidase (ΔE420nm min−1 g−1)	Peroxidase (ΔE485nm min−1 g−1)
Control	0.0435 ± 0.0201a	0.0126 ± 0.0017b	6.4304 ± 0.0675b	13.557 ± 0.1804a
KIO3	0.0838 ± 0.0258a	0.0033 ± 0.0017a	7.5057 ± 0.0919c	13.624 ± 0.6928a
5-ISA	0.1253 ± 0.0434b	0.0034 ± 0.0010a	5.2687 ± 0.2514a	13.092 ± 0.4896a
3,5-diISA	0.0680 ± 0.0385a	0.0029 ± 0.0006a	5.9611 ± 0.2013 ab	14.684 ± 0.6331b

^aResults are shown as means for 2018–2019 ± standard deviation (SD); n = 8, means followed by the same letter (a, b) are not significantly different (p < 0.05).