Table 3. Salinity effects on antioxidant phytochemicals and antioxidant capacity in three selected A. tricolor accessions.
| Treatment | β-carotene (mg kg-1) | Ascorbic acid (mg kg-1) | Total polyphenol content (GAE mg kg-1 dw) | Total flavonoid content (RE mg kg-1 dw) | Total antioxidant capacity (DPPH) (TEAC mg kg-1 dw) | Total antioxidant capacity ABTS+) (TEAC mg kg-1 dw) |
|---|---|---|---|---|---|---|
| Accession × Salinity stress (SS) | ||||||
| VA3 × NS | 8.28 ± 0.09g | 165.74 ± 2.15i | 28.25 ± 0.24e | 110.45 ± 1.47i | 32.56 ± 0.15d | 55.56 ± 0.37g |
| VA3 × MSS | 8.74 ± 0.11e | 212.86 ± 2.47h | 30.63 ± 0.31c | 129.85 ±1.52h | 33.45 ± 0.24c | 58.75 ± 0.45e |
| VA3 × SSS | 10.26 ± 0.12c | 286.63 ± 3.12g | 32.45 ± 0.42b | 154.17 ± 2.02g | 35.42 ± 0.16b | 63.52 ± 0.57c |
| VA12 × NS | 7.78 ± 0.15h | 984.65 ± 3.51f | 20.26 ± 0.33i | 340.65 ± 2.48d | 23.52 ± 0.27h | 52.35 ± 0.62h |
| VA12 × MSS | 8.44 ± 0.07f | 1052.74 ± 3.24e | 22.49 ± 0.38h | 385.96 ± 3.07b | 24.55 ± 0.23g | 56.38 ± 0.53f |
| VA12 × SSS | 10.32 ± 0.14c | 1225.53 ± 2.87d | 26.36 ± 0.54f | 422.54 ± 1.95a | 26.88 ± 0.24f | 61.62 ± 0.28d |
| VA14 × NS | 10.18 ± 0.08d | 1645.15 ± 1.58c | 25.53 ± 0.37g | 280.64 ± 1.25f | 28.35 ± 0.17e | 56.31 ± 0.41f |
| VA14 × MSS | 15.89 ± 0.16b | 2156.17 ± 2.62b | 29.6 ± 0.29d | 325.88 ± 1.27e | 35.45 ± 0.16b | 65.76 ± 0.62b |
| VA14 × SSS | 21.46 ± 0.13a | 3563.52 ± 2.57a | 35.52 ± 0.26a | 364.37 ± 2.22c | 44.85 ± 0.20a | 82.55 ± 0.82a |
| Accession | ||||||
| VA3 | 9.14 ± 0.11c | 221.62 ± 2.08c | 30.44 ± 0.23a | 131.49 ± 2.18c | 33.81 ± 0.17b | 59.27 ± 0.49b |
| VA12 | 8.58 ± 0.06b | 1087.44 ± 2.49b | 23.04 ± 0.28b | 383.12 ± 1.67a | 24.98 ± 0.26c | 56.78 ± 0.27c |
| VA14 | 15.82 ± 0.05a | 2454.67 ± 1.68a | 30.22 ± 0.19a | 323.63 ± 2.35b | 36.22 ± 0.22a | 68.21 ± 0.37a |
| Salinity stress (SS) | ||||||
| NS | 8.75 ± 0.15c | 931.47 ± 3.01c | 24.68 ± 0.17c | 243.89 ± 1.37c | 28.15 ± 0.23c | 54.74 ± 0.28c |
| MSS | 11.46 ± 0.16b | 1140.84 ± 3.48b | 27.57 ± 0.24b | 280.55 ± 1.92b | 31.15 ± 0.19b | 60.31 ± 0.34b |
| SSS | 14.27 ± 0.17a | 1691.62 ± 2.68a | 31.44 ± 0.18a | 313.78 ± 1.83a | 35.72 ± 0.17a | 69.23 ± 0.28a |
| Significance | ||||||
| Accession | *** | *** | *** | *** | *** | *** |
| SS | *** | *** | *** | *** | *** | *** |
| Accession × SS | *** | *** | *** | *** | *** | *** |
SS, Salinity stress; NS, No saline water; MSS, Moderate salinity stress, SSS, Severe salinity stress, Values are means of six replicates and different letters are differed significantly by Duncan Multiple Range Test (***, P < 0.001).