Table 2.
Content of total water-soluble antioxidants (mg/100 g d.w.) of wild Brassica spp. Flavonol derivatives, hydroxycinnamoyl derivatives, and total phenols were detected in raw, F50, and F80 extracts. Ascorbic acid (AsA) was detected in raw and F17. Biothiols were present only in raw extracts.
| B.incana | B. macrocarpa | B. rupestris | B. villosa | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| BN | BW | BB | BU5 | BU9 | BU15 | BL | BX | BY5 | DC | |||||
| Flavonol | Raw | 370.6 ± 6.8 g | 419.0 ± 17.2 h | 153.7 ± 0.9 a | 282.0 ± 13.7 c | 430.2 ± 30.2 h | 218.6 ± 10.5 b | 325.5 ± 6.1 de | 343.0 ± 22.4 ef | 277.0 ± 61.5 c | 297.4 ± 5.7 cd | |||
| derivatives | F50 | 284.6 ± 38.1 | 275.1 ± 5.0 | 109.1 ± 6.4 | 262.1 ± 10.7 | 152.8 ± 21.0 | 166.9 ± 2.6 | 344.3 ± 17.6 | 338.4 ± 10.5 | 101.3 ± 19.2 | 159.0 ± 19.2 | |||
| F80 | n.d. | 69.9 ± 7.7 | 27.3 ± 2.7 | 33.2 ± 2.1 | 33.5 ± 4.2 | n.d. | 57.5 ± 17.0 | 38.7 ± 6.8 | 76.2 ± 16.4 | 8.3 ± 0.3 | ||||
| Hydroxy- | Raw | 157.4 ± 1.5 e | 114.9 ± 5.8 c | 10.2 ± 0.8 a | 38.0 ± 13.7 b | 37.5 ± 2.6 b | 19.0 ± 0.3 a | 133.0 ± 4.5 d | 120.5 ± 9.4 cd | 187.4 ± 33.4 f | 154.2 ± 2.6 e | |||
| cinnamoyl | F50 | 9.3 ± 0.3 | 21.6 ± 1.8 | 1.7 ± 0.2 | 3.2 ± 0.4 | 8.8 ± 0.8 | 1.0 ± 0.2 | 10.7 ± 2.5 | 10.2 ± 2.2 | 24.8 ± 2.0 | 18.1 ± 8.0 | |||
| gentiobiosides | F80 | 113.0 ± 13.3 | 93.7 ± 7.3 | 8.9 ± 0.6 | 32.4 ± 0.2 | 51.6 ± 7.7 | 18.3 ± 0.6 | 91.1 ± 4.2 | 121.0 ± 3.0 | 181.0 ± 20.4 | 116.4 ± 4.2 | |||
| Total phenols | Raw | 531.0 ± 4.2 e | 533.9 ± 23.0 e | 163.9 ± 1.8 a | 319.9 ± 13.2 c | 444.5 ± 65.6 d | 237.6 ± 10.7 b | 454.7 ± 5.3 d | 463.5 ± 31.8 d | 464.4 ± 94.9 d | 451.6 ± 8.3 d | |||
| AsA | Raw | 355.7 ± 60.8 f | 249.2 ± 42.6 e | 103.9 ± 17.8 b | 214.8 ± 36.7 de | 30.1 ± 12.2 a | 119.8 ± 20.5 bc | 167.0 ± 28.5 cd | 375.8 ± 64.2 f | 7.6 ± 1.3 a | 38.2 ± 6.5 a | |||
| F17 | 122.8 ± 3.5 | 96.5 ± 3.9 | 37.0 ± 10.5 | 101.5 ± 6.5 | 14.6 ± 0.2 | 70.0 ± 7.2 | 76.4 ± 21.9 | 131.0 ± 9.1 | 1.1 ± 0.1 | 5.7 ± 2.1 | ||||
| %* | - 65.5 | - 61.3 | - 64.4 | - 52.8 | - 51.6 | - 41.6 | - 54.2 | - 65.1 | - 85.2 | - 85.1 | ||||
| Biothiols | Raw | 3.83 ± 1.02 d | 1.88 ± 0.5 c | 0.59 ± 0.16 a | 1.19 ± 0.45 abc | 1.7 ± 0.0 bc | 1.02 ± 0.27 abc | 0.89 ± 0.24 abc | 5.13 ± 1.37 e | 0.67 ± 0.18 ab | 0.83 ± 0.22 ab | |||
Values are reported as mean ± standard deviation. Significantly different means in a row are indicated with different letters (p < 0.001). %* indicates percent reduction of AsA in F17 compared to raw extract.