Table 5.
Composition of carotenoids profile of green and red Salanova lettuce grown hydroponically in a Fitotron open-gas-exchange growth chamber under six Se concentrations applied in the nutrient solution.
| Source of variance | Violaxanthin + neoxanthin (μg violaxanthin eq. g−1 dw) |
Lutein (μg g−1 dw) |
β-Cryptoxanthin (μg g−1 dw) |
β-carotene (μg g−1 dw) |
|---|---|---|---|---|
| Cultivar (C) | ||||
| Green Salanova | 507.39 ± 14.1 | 207.62 ± 8.55 | 370.60 ± 13.8 | 165.62 ± 6.53 |
| Red Salanova | 993.13 ± 28.8 | 600.36 ± 15.3 | 989.43 ± 26.4 | 337.14 ± 11.8 |
| t-test | *** | *** | *** | *** |
| Selenium (µM Se) (S) | ||||
| 0 | 733.14 ± 53.0 | 421.04 ± 62.6 | 717.66 ± 107 | 296.43 ± 37.0 |
| 8 | 633.57 ± 95.3 | 357.59 ± 81.6 | 587.32 ± 127 | 252.25 ± 51.7 |
| 16 | 774.82 ± 117 | 421.51 ± 101 | 699.87 ± 165 | 272.02 ± 57.1 |
| 24 | 762.72 ± 123 | 385.30 ± 88.9 | 645.43 ± 138 | 215.09 ± 29.6 |
| 32 | 850.46 ± 148 | 461.27 ± 113 | 784.17 ± 176 | 239.98 ± 33.2 |
| 40 | 746.85 ± 118 | 377.20 ± 81.1 | 645.67 ± 119 | 232.51 ± 23.2 |
| *** | *** | *** | *** | |
| C × S | ||||
| Green Salanova × 0 µM Se | 614.93 ± 5.54 d | 282.15 ± 3.01 e | 478.51 ± 3.85 e | 214.60 ± 5.39 e |
| Green Salanova × 8 µM Se | 421.46 ± 7.09 f | 175.52 ± 3.87 g | 305.07 ± 5.49 h | 136.91 ± 2.42 h |
| Green Salanova × 16 µM Se | 513.05 ± 3.29 e | 195.75 ± 4.01 fg | 331.35 ± 6.79 gh | 145.04 ± 3.10 gh |
| Green Salanova × 24 µM Se | 489.24 ± 7.10 e | 186.75 ± 2.57 fg | 337.96 ± 8.31 gh | 149.09 ± 2.93 gh |
| Green Salanova × 32 µM Se | 520.97 ± 4.26 e | 209.40 ± 5.19 f | 390.71 ± 2.76 f | 166.05 ± 4.61 fg |
| Green Salanova × 40 µM Se | 484.69 ± 2.68 e | 196.11 ± 3.01 fg | 379.99 ± 6.92 fg | 182.06 ± 2.73 f |
| Red Salanova × 0 µM Se | 851.34 ± 6.70 c | 559.94 ± 17.4 cd | 956.81 ± 21.7 c | 378.27 ± 10.1 ab |
| Red Salanova × 8 µM Se | 845.68 ± 19.1 c | 539.67 ± 10.4 d | 869.57 ± 32.3 d | 367.60 ± 8.28 b |
| Red Salanova × 16 µM Se | 1,036.59 ± 11.4 b | 647.27 ± 15.1 b | 1,068.38 ± 25.7 b | 399.01 ± 13.9 a |
| Red Salanova × 24 µM Se | 1,036.19 ± 17.1 b | 583.85 ± 7.42 c | 952.89 ± 8.83 c | 281.09 ± 3.13 d |
| Red Salanova × 32 µM Se | 1,179.95 ± 20.8 a | 713.14 ± 0.18 a | 1,177.62 ± 26.2 a | 313.91 ± 4.53 c |
| Red Salanova × 40 µM Se | 1,009.02 ± 26.4 b | 558.28 ± 10.9 cd | 911.34 ± 16.9 cd | 282.95 ± 11.8 d |
| *** | *** | *** | *** |
ns, *** Non-significant or significant at P ≤ 0.001, respectively. In the absence of interaction, cultivar means were compared by t-Test and Se application means by Duncan’s multiple-range test (P = 0.05). Different letters within each column indicate significantly different means. All data are expressed as mean ± SE, n = 3.