Table 4.

Total antioxidant capacity (µmol trolex g^-1 FW), antioxidant molecules content (µmol g^-1 FW), and the activity of antioxidant enzymes (mol min^-1 mg^-1 protein) in wheat grains under drought stress and Olive mill wastewater treatment (OMWW).

Parameter	Control	Stress	OMWW	OMWW + Stress
Total antioxidant capacity	821.14 ± 100.13 b	981.49 ± 90.19 b	1317.64 ± 100.20 a	1288.23 ± 85. 65 a
Polyphenols	50.88 ± 6.11 c	61.95 ± 6.66 bc	74.76 ± 8.19 b	93.08 ± 6.27 a
Flavonoids	2.46 ± 0.31 b	2.96 ± 0.35 b	3.96 ± 0.44 a	4.58 ± 0.41 a
Ascorbate	2.14 ± 0.32 b	2.70 ± 0.39 ab	3.47 ± 0.35 a	3.25 ± 0.29 a
Glutathione	0.91 ± 0.15 b	1.02 ± 0.09 b	1.31 ± 0.31 ab	1.66 ± 0.26 a
Peroxidase	47.21 ± 6.11 b	54.84 ± 5.59 ab	68.02 ± 8.05 a	65.58 ± 7.19 a
Catalase	159.11 ± 21.08 b	180.08 ± 23.19 ab	198.61 ± 26.23 ab	230.11 ± 31.17 a
Superoxide Dismutase	1688.67 ± 150.34 b	1882.18 ± 169.93 b	1528.45 ± 200.49 b	2470.10 ± 190.74 a
ascorbate peroxidase	15.24 ± 2.01 b	17.88 ± 2.89 ab	22.13 ± 2.23 a	22.53 ± 3.11 a
Dehydroascorbate reductase	5.00 ± 0.83 b	5.50 ± 0.55 b	6.70 ± 0.98 ab	7.56 ± 0.76 a
monodehydroascorbate reductase	4.60 ± 0.45 b	5.10 ± 0.41 b	5.40 ± 0.71 b	7.08 ± 0.46 a
Glutathione reductase	67.28 ± 5.87 b	73.17 ± 7.19 b	99.96 ± 5.47 a	100.38 ± 11.10 a
Glutathione peroxidase	27.09 ± 2.18 b	31.25 ± 2.77 b	39.04 ± 1.89 a	40.48 ± 4.12 a
Glutaredoxins	12.57 ± 1.87 b	15.69 ± 1.76 ab	18.59 ± 2.04 a	20.35 ± 2.77 a
Thioredoxin	1.20 ± 0.09 b	1.35 ± 0.25 b	1.82 ± 0.14 a	2.10 ± 0.19 a
Peroxiredoxins	39.92 ± 3.11 b	55.43 ± 5.53 a	58.09 ± 2.19 a	58.06 ± 3.67 a

At a 5% probability level, the Tukey HSD test reveals that sharing the same letter(s) is not significantly different.