Table 2.
Flavonoid content levels in “Ramata di Montoro” and “Rossa di Tropea” onion skins and their exhaustive extract.
| “Ramata di Montoro” Onion | “Rossa di Tropea” Onion | |||
|---|---|---|---|---|
| Compounds | Exhaustive Extract (mg/g) |
Onion Skin (mg/100 gDM) |
Exhaustive Extract (mg/g) |
Onion Skin (mg/100 gDM) |
| CyG | nd | nd | 16.2 ± 0.2 c | 365.2 ± 4.5 c |
| CymG a | nd | nd | 1.5 ± 0.1 a | 34.5 ± 2.3 a |
| QdG | 5.5 ± 0.9 a | 64.0 ± 10.5 a | 8.8 ± 0.2 b | 198.2 ± 4.5 b |
| QG | 44.6 ± 5.2 e | 517.7 ± 60.3 e | 71.2 ± 3.8 g | 1602.9 ± 85.5 g |
| Q | 30.1± 2.5 d | 349.5 ± 29.1 d | 52.4 ± 2.9 f | 1180.0 ± 65.3 f |
| Q2 | 22.9 ± 2.8 c | 265.5 ± 45.4 c | 27.1 ± 4.1 d | 608.9 ± 18.8 d |
| Q2Ga | 14.6 ± 2.5 b | 168.9 ± 28.9 b | 19.4 ± 0.6 c | 436.6 ± 13.5 c |
| Q2Gb | 16.4 ± 1.6 b | 190.3 ± 18.5 b | 17.8 ± 2.6 c | 399.6 ± 58.3 c |
| Q3 | 29.0 ± 3.7 d | 336.7 ± 42.9 d | 35.1 ± 9.0 e | 790.4 ± 17.3 e |
Values are means of three replicates ± SD. nd = not detected. a–g Expressed as equivalents of CyG. Different superscript letters within each column indicate significant differences among samples (p < 0.05, 95% confidence level).