Table 2. Antioxidant capacity of free and bound fractions of wheat phenolic extracts determined by the DPPH (µmol Trolox equivalent/g grain) and FRAP (mmol Fe2+/100 g grain) methods.
| DPPH | FRAP | |||||
| (µmol Trolox equivalent/g grain) | (mmol Fe 2+/100 g grain) | |||||
| Free | Bound | Total | Free | Bound | Total | |
| AN (O) | 1.90±0.06 (ab) | 7.20±1.11 (a) | 9.10±1.16 (a) | 0.32±0.04 (a) | 0.99±0.01 (c) | 1.31±0.03 (b) |
| FR (O) | 1.39±0.10 (bc) | 7.04±0.96 (a) | 8.43±1.06 (a) | 0.23±0.02 (b) | 1.08±0.01 (a) | 1.31±0.03 (b) |
| GR (O) | 1.94±0.20 (ab) | 8.05±1.05 (a) | 9.99±1.25 (a) | 0.20±0.01 (bc) | 1.06±0.03 (ab) | 1.26±0.04 (b) |
| IN (O) | 1.58±0.11 (abc) | 6.35±1.15 (a) | 7.93±1.27 (a) | 0.12±0.01 (d) | 1.01±0.01 (bc) | 1.13±0.01 (c) |
| VE (O) | 2.11±0.35 (a) | 7.66±0.36 (a) | 9.77±0.72 (a) | 0.34±0.01 (a) | 1.11±0.03 (a) | 1.45±0.03 (a) |
| PA (M) | 1.16±0.04 (c) | 5.61±0.88 (a) | 6.77±0.92 (a) | 0.16±0.01 (cd) | 0.95±0.01 (c) | 1.11±0.01 (c) |
AN, Andriolo; FR, Frassineto, GR, Gentil rosso; IN, Inallettabile; VE, Verna; PA, Palesio; M, modern cultivar; O, old cultivar. Values are expressed as means ± SEM for triplicates. Means in the same column with common letters are not significantly different (p<0.05).