Table 6.
The content of flavonols (µg/g dw a) in apple peels.
| Que | Que3glu | Que3rut | QueD1 | QueD2 | ||
|---|---|---|---|---|---|---|
| Traditional | ‘Crveni Boskop’ | 49.01 ± 3.45 m | 52.67 ± 3.990 k | n.d. | 96.05 ± 9.01 g | 27.47 ± 0.99 h |
| ‘Francuska Kožara’ | n.d. | 56.00 ± 1.79jk | 63.95 ± 1.41 e,f | 133.05 ± 4.93 f | 47.72 ± 0.93 g | |
| ‘Ljepocvjetka’ | 209.31 ± 7.98 b | 108.88 ± 3.77 f | n.d. | 232.63 ± 20.93 e | n.d. | |
| ‘Šampanjka’ | 115.93 ± 4.80 f,g | 135.31 ± 5.36 d | 991.43 ± 62.49 c | 245.62 ± 10.72 e | n.d. | |
| ‘Apistar’ | 119.73 ± 1.98 e,f | 141.01 ± 2.92 c | 956.56 ± 24.61 c | 341.83 ± 7.49 b | n.d. | |
| ‘Božicnica’ | 121.72 ± 1.08 e | 153.50 ± 2.08 b | 2244.46 ± 71.91 a | 320.13 ± 4.28 c | 508.82 ± 21.81 a | |
| ‘Brčko’ | 65.73 ± 3.14 k | 63.47 ± 0.98 i | 234.66 ± 10.35 d,e,f | 131.51 ± 6.38 f | n.d. | |
| ‘Kanadska Reneta’ | 79.51 ± 1.68 i | 57.69 ± 1.90 j | 858.81 ± 5.77 c | 85.57 ± 3.17 g,h | 225.08 ± 13.04 d | |
| ‘Zlatna Zimska Parmenka’ | 54.31 ± 3.05 l | 75.32 ± 1.50 g | 2383.28 ± 77.13 a | 133.74 ± 9.20 f | n.d. | |
| ‘Kraljevčica’ | 119.97 ± 5.16 e,f | 129.93 ± 6.30 e | 1621.28 ± 57.42 b | 285.03 ± 14.59 d | 459.16 ± 20.80 b | |
| ‘Bobovac’ | 270.48 ± 1.56 a | 178.63 ± 1.73 a | 1632.51 ± 939.02 b | 390.52 ± 40.41 a | 360.78 ± 22.48 c | |
| ‘Adamčica’ | 56.36 ± 1.83 l | 46.41 ± 1.42 l | n.d. | 75.78 ± 2.51 h | n.d. | |
| Commercial | ‘Golden Delicious’ | 111.60 ± 1.77 g | 55.36 ± 1.07 j,k | 296.53 ± 4.90 d,e,f | n.d. | 65.21 ± 0.89 f |
| ‘Idared’ | 46.23 ± 1.48 m | n.d. | 90.09 ± 1.83 e,f | 88.33 ± 0.67 g,h | n.d. | |
| ‘Jonagold’ | 148.15 ± 5.92 d | 70.76 ± 3.23 h | 413.42 ± 12.98 d | 133.05 ± 6.23 f | 89.05 ± 4.12 e | |
| ‘Fuji’ | 173.32 ± 3.69 c | 39.68 ± 3.62 m | 316.20 ± 56.38 d,e | 79.31 ± 9.30 g,h | 70.54 ± 9.18 f | |
| ‘Granny Smith’ | 76.61 ± 0.85 i,j | 57.10 ± 0.34 j | n.d. | 76.51 ± 3.70 h | n.d. | |
| ‘Gala’ | 71.98 ± 3.85 j | 56.04 ± 3.52 j,k | n.d. | 121.98 ± 8.24 f | n.d. | |
| ‘Mutsu’ | 106.12 ± 4.28 h | 46.25 ± 1.30 l | 260.07 ± 5.64 d,e,f | 85.77 ± 2.994 g,h | 72.37 ± 0.71 f | |
| ‘Red Delicious’ | 61.71 ± 0.82 k | 64.64 ± 0.87 i | n.d. | 120.06 ± 1.95 f | 225.16 ± 3.66 d |
a: Dry weight. Mean ± SD based on two extracts each measured twice (n = 4), * p < 0.05. Different letters in each column indicate significant differences at 95% confidence level as obtained by the LSD test. Que—quercetin; Que3glu–quercetin-3-glucoside; Que3rut—quercetin-3-rutinoside; Qued1—quercetin derivative 1; Qued2—quercetin derivative 2; n.d.—not detected.