Table 4.
Antioxidant capacity in tomato leaves.
| Stress | Treatment | Antioxidant Capacity Equivalent to Trolox | Antioxidant Capacity Equivalent to Vitamin C | Reduced Glutathione (μmol of GSH per mg of Total Proteins) | Total Phenols (mg of Gallic Acid per g of Fresh Weight) | ||
|---|---|---|---|---|---|---|---|
| ABTS | DPPH | ABTS | DPPH | ||||
| Without stress | T0 | 80.02 a | 47.89 a | 10.10 a | 15.10 a | 282.92 b | 1.72 b |
| CsPVA | 58.93 a | 56.19 a | 7.20 a | 17.31 a | 286.95 b | 2.76 a | |
| NCu | 89.38 a | 51.97 a | 11.39 a | 16.19 a | 447.58 a | 2.64 a | |
| NaCl | NaCl | 91.41 a | 49.51 a | 11.67 a | 15.53 a | 221.30 a | 2.77 a |
| Cs–NaCl | 91.74 a | 23.48 b | 11.71 a | 8.62 b | 284.00 a | 4.27 a | |
| nCu–NaCl | 99.52 a | 21.16 b | 12.78 a | 8.01 b | 280.61 a | 3.18 a | |
T0: Absolute control. CsPVA: 1 g chitosan–PVA hydrogel. NPsCu: 10 mg Cu NPs + chitosan–PVA. NaCl: witness + 100 mM NaCl. Cs–NaCl: Cs–PVA + 100 mM NaCl. NPsCu–NaCl: 10 mg Cu NPs + chitosan–PVA + 100 mM NaCl. ABTS: 2,20-Azinobis-3-ethylbenzotiazoline-6-sulphonic acid. DPPH: 2,2-Diphenyl-1-Picrylhydrazyl. Means with the same letter within the same column of each treatment are not different according to Fisher Least Significant Difference test (α ≤ 0.05).