Table 1.
Polyphenol content, anthocyanins and antioxidant capacities of blueberries
| Blueberry genotype | Dry matter % | Total phenolics1 | Total anthocyanins2 |
Total proanthocyanidins3 | ABTS4 | FRAP5 | |
|---|---|---|---|---|---|---|---|
| HPLC-UV | LC-MS | ||||||
| Pink Lemonade (PLE) | 19.9 | 15.0 ± 0.35b | 0.80 ± 0.06d | 1.00 | 3.51 ± 0.04b | 50.3 ± 2.7bc | 308 ± 13.5bc |
| Pink Champagne (PCH) | 20.7 | 8.43 ± 0.16e | 1.17 ± 0.01c | 1.34 | 0.87 ± 0.005d | 39.6 ± 1.9cd | 217 ± 9.5d |
| Florida Rose (FLR) | 17.0 | 14.1 ± 0.18b | 0.27 ± 0.00e | 0.35 | 3.92 ± 0.10a | 51.9 ± 1.5bc | 347 ± 12.9ab |
| US 2117 | 19.8 | 11.0 ± 0.43d | 0.83 ± 0.02d | 1.20 | 1.13 ± 0.01c | 58.5 ± 2.1b | 276 ± 9.4c |
| US 2211 | 18.5 | 7.53 ± 0.19e | 0.20 ± 0.02f | 0.17 | 0.73 ± 0.005d | 32.5 ± 1.7d | 149 ± 4.8e |
| US 2235 | 15.3 | 12.3 ± 0.22c | 2.12 ± 0.07b | 3.32 | 0.76 ± 0.02d | 45.9 ± 5.2c | 299 ± 9.4bc |
| Lowbush | 15.0 | 24.5 ± 0.69a | 12.6 ± 0.15a | 14.5 | 3.47 ± 0.06b | 127 ± 5.3a | 389 ± 19.4a |
1
Total phenolics quantified by Folin Ciocalteu assay as mg gallic acid equivalent/g
2
total anthocyanins measured by HPLC quantified as mg cyanidin-3-glucoside equivalent/g, LC-MS quantification (mg/g) refers to Table 3
3
total proanthocyanidins quantified by DMAC assay as mg procyanidin B2 equivalent/g
4
radical scavenging activity by ABTS as µmol Trolox equivalent/g
5
antioxidant capacity by FRAP assay as µmol FeSO4 equivalent/g. Results were expressed as mean ± SD (n=3). All concentrations were calculated based on dry weight. Means with different superscript letters within the same column are significantly different (p<0.05).