Table 5.

Means of leaves total antioxidant activities using DPPH free radical scavenging activity (IC₅₀, μg mL⁻¹) and β-Carotene-linoleic acid assay (IC₅₀, μg mL⁻¹) in two successive seasons (2016 and 2017) following salinity (ppm) and salicylic acid (ppm) treatments.

Salinity (ppm)	Salicylic acid (ppm)	Essential oils				Leaf extracts
		DPPH (IC50, μg mL−1)		β-Carotene-linoleic acid (IC50, μg mL−1)		DPPH (IC50, μg mL−1)		β-Carotene-linoleic acid (IC50, μg mL−1)
		2016	2017	2016	2017	2016	2017	2016	2017
640	0	0.26 ± 0.01a	0.25 ± 0.02a	0.28 ± 0.01a	0.29 ± 0.01a	0.23 ± 0.01c	0.22 ± 0.02c	0.25 ± 0.02c	0.24 ± 0.01c
	100	0.22 ± 0.00c	0.22 ± 0.01bc	0.24 ± 0.02a	0.25 ± 0.02c	0.18 ± 0.02h	0.16 ± 0.01f	0.21 ± 0.01f	0.18 ± 0.01g
	200	0.23 ± 0.02bc	0.22 ± 0.02bc	0.25 ± 0.01c	0.24 ± 0.02c	0.22 ± 0.02d	0.21 ± 0.00d	0.24 ± 0.01d	0.23 ± 0.02d
	300	0.23 ± 0.01c	0.23 ± 0.02b	0.26 ± 0.01b	0.27 ± 0.01b	0.24 ± 0.01b	0.23 ± 0.01b	0.26 ± 0.02b	0.25 ± 0.01b
2,000	0	0.24 ± 0.01b	0.24 ± 0.01ab	0.27 ± 0.02b	0.26 ± 0.02b	0.19 ± 0.01g	0.18 ± 0.02e	0.21 ± 0.01f	0.20 ± 0.02f
	100	0.19 ± 0.00d	0.20 ± 0.01c	0.23 ± 0.02d	0.22 ± 0.01d	0.23 ± 0.02c	0.22 ± 0.01c	0.25 ± 0.02c	0.24 ± 0.01c
	200	0.22 ± 0.03c	0.23 ± 0.00b	0.25 ± 0.01c	0.24 ± 0.00c	0.23 ± 0.01c	0.21 ± 0.01d	0.25 ± 0.01c	0.24 ± 0.01c
	300	0.23 ± 0.02bc	0.22 ± 0.01bc	0.25 ± 0.00c	0.24 ± 0.01c	0.21 ± 0.02e	0.21 ± 0.01d	0.23 ± 0.01e	0.22 ± 0.02e
4,000	0	0.23 ± 0.01bc	0.23 ± 0.01b	0.26 ± 0.02b	0.25 ± 0.02c	0.19 ± 0.01g	0.18 ± 0.01e	0.21 ± 0.00f	0.20 ± 0.01f
	100	0.18 ± 0.02de	0.17 ± 0.00d	0.20 ± 0.01d	0.19 ± 0.01e	0.24 ± 0.01b	0.23 ± 0.02b	0.26 ± 0.01b	0.25 ± 0.00b
	200	0.17 ± 0.00e	0.17 ± 0.01d	0.19 ± 0.02d	0.19 ± 0.01e	0.25 ± 0.02a	0.24 ± 0.01a	0.28 ± 0.01a	0.26 ± 0.00a
	300	0.17 ± 0.01e	0.18 ± 0.02d	0.20 ± 0.00d	0.19 ± 0.01e	0.20 ± 0.01f	0.21 ± 0.00d	0.23 ± 0.00e	0.23 ± 0.01d

Means with different letters within the same column have significant difference at P ≤ 0.05.