Table 4.
Chromium, Se, Mo, Co, Al, Ni, As, Cd, and Pb concentration in S. minor, S. arvensis, and T. officinale grown in a hydroponic system and harvested at microgreen or baby green stage.
| Treatments | Cr | Se | Mo | Co | Al | Ni | As | Cd | Pb |
|---|---|---|---|---|---|---|---|---|---|
| μg/100 g FW | |||||||||
| Species | |||||||||
| S. minor | 256.4 ± 281.7 | 25.3 ± 4.2 a | 36.3 ± 20.5 a | 7.3 ± 4.7 | 2284.8 ± 2058.7 | 138.5 ± 130.2 | 2.4 ± 0.7 | 0.5 ± 0.2 b | 17.9 ± 15.3 a |
| S. arvensis | 59.3 ±5 1.1 | 10.0 ± 3.2 b | 20.3 ± 3.2 b | 6.6 ± 5.8 | 3664.8 ± 3903.1 | 32.3 ± 28.1 | 1.0 ± 0.3 | 0.4 ± 0.1 b | 1.8 ± 0.6 b |
| T. officinale | 267.3 ± 275.9 | 22.3 ± 4.1 a | 25.2 ± 8.5 | 12.2 ± 7.6 | 4331.3 ± 3546.0 | 139.8 ± 146.8 | 4.1 ± 5.7 | 0.6 ± 0.2 a | 4.6 ± 1.9 b |
| Stage of harvest | |||||||||
| Microgreens | 192.3 ± 243.0 | 18.1 ± 5.8 | 19.3 ± 4.2 b | 11.1 ± 7.3 a | 4729.6 ± 3878.4 a | 107.9 ± 125.2 | 1.3 ± 0.5 | 0.4 ± 0.1 b | 12.2 ± 14.8 a |
| Baby greens | 196.4 ± 245.6 | 20.4 ± 9.5 | 35.2 ± 16.0 a | 6.3 ± 4.3 b | 2124.3 ± 1674.4 b | 99.2 ± 120.5 | 3.6 ± 4.6 | 0.6 ± 0.2 a | 4.0 ± 1.9 b |
| Significance | |||||||||
| Species | ns | *** | *** | ns | ns | ns | ns | ** | *** |
| Stage of harvest | ns | ns | *** | * | * | ns | ns | *** | ** |
| Species x stage of harvest | ns | ns | *** | ** | * | ns | ns | * | ** |
Means (± SD) in columns not sharing the same letters are significantly different according to Duncan’s Test (p ≤ 0.05). ns = not significant; asterisk(s) = significant at 0.05 (*). 0.005 (**) or 0.001(***) level of significance.