Table 1.
Average of constitutive unit content (mole %), mean degree of polymerization and concentrations of condensed tannin in spine grape skins.
| Grape skins | Extension units(%) |
Terminal units(%) |
mDP | Concentration | |||||
|---|---|---|---|---|---|---|---|---|---|
| ECG | EGC | C | EC | ECG | C | EC | mg/g | ||
| Xiangzhenzhu | 16.67 ± 0.24b | 0.67 ± 0.24ab | 1.85 ± 0.10d | 69.78 ± 0.15de | 4.91 ± 0.07f | 0.90 ± 0.06jk | 3.46 ± 0.33 k | 10.70 ± 0.16b | 6.00 ± 0.02b |
| Gaoshan #2 | 4.78 ± 0.15f | 0.03 ± 0.00e | 0.53 ± 0.33ef | 67.39 ± 0.28 g | 2.33 ± 0.23 k | 7.02 ± 0.02d | 14.44 ± 0.31c | 4.20 ± 0.14e | 5.70 ± 0.22b |
| Gaoshan #4 | 0.79 ± 0.15 l | 0.09 ± 0.06e | 1.60 ± 0.28d | 89.03 ± 0.02a | 2.62 ± 0.27jk | 0.43 ± 0.30 k | 1.44 ± 0.3j | 13.40 ± 0.25a | 7.80 ± 0.11a |
| Gaoshan #5 | 2.69 ± 0.22hi | 0.3 ± 0.21 cd | 0.89 ± 0.08e | 78.27 ± 0.19c | 1.43 ± 0.30 l | 1.09 ± 0.06ij | 13.19 ± 0.13d | 6.40 ± 0.26c | 7.40 ± 0.28a |
| Zhilan | 1.77 ± 0.16 k | 0.20 ± 0.14d | 0.18 ± 0.13f | 88.62 ± 0.27a | 3.37 ± 0.30hij | 2.26 ± 0.18 h | 1.57 ± 0.31 l | 14.00 ± 0.07a | 3.80 ± 0.14 cd |
| Junzi #1 | 17.20 ± 0.14b | 0.21 ± 0.15d | 4.04 ± 0.03a | 46.90 ± 0.07 k | 8.58 ± 0.30d | 11.6 ± 0.29b | 7.54 ± 0.32 h | 3.60 ± 0.28f | 2.20 ± 0.15e |
| Junzi #2 | 13.26 ± 0.18c | 0.32 ± 0.20 cd | 0.98 ± 0.02e | 68.83 ± 0.12f | 4.47 ± 0.33 fg | 0.85 ± 0.1jk | 9.19 ± 0.14 g | 6.90 ± 0.08c | 5.30 ± 0.20b |
| 5015 | 0.84 ± 0.11 l | 0.78 ± 0.15a | 0.68 ± 0.23ef | 81.83 ± 0.12b | 4.28 ± 0.20 fg | 5.07 ± 0.05f | 6.10 ± 0.06i | 6.50 ± 0.34c | 5.80 ± 0.15b |
| 5044 | 8.46 ± 0.32e | 0.76 ± 0.17a | 2.52 ± 0.34b | 69.13 ± 0.09ef | 6.05 ± 0.03e | 1.59 ± 0.30hi | 11.8 ± 0.12ef | 5.10 ± 0.10d | 3.00 ± 0.00d |
| 5049 | 9.42 ± 0.29d | 0.76 ± 0.12a | 2.08 ± 0.05 cd | 58.88 ± 0.09i | 6.49 ± 0.34e | 6.13 ± 0.09e | 14.15 ± 0.11c | 3.70 ± 0.19f | 4.50 ± 0.35c |
| 5059 | 13.22 ± 0.16c | 0.38 ± 0.30c | 0.74 ± 0.18e | 69.30 ± 0.21f | 4.13 ± 0.09fgh | 3.99 ± 0.00 g | 7.82 ± 0.13 h | 6.30 ± 0.19c | 5.70 ± 0.20b |
| 5055 | 19.28 ± 0.20a | 0.63 ± 0.206ab | 2.01 ± 0.01 cd | 35.99 ± 0.01 m | 22.16 ± 0.11a | 4.10 ± 0.07 g | 15.56 ± 0.31b | 2.40 ± 0.28 g | 0.30 ± 0.23 g |
| 5061 | 13.31 ± 0.22c | 0.59 ± 0.30b | 2.40 ± 0.28 cd | 56.53 ± 0.34j | 12.64 ± 0.26b | 1.80 ± 0.14 h | 12.10 ± 0.07e | 3.80 ± 0.16f | 3.40 ± 0.29d |
| 5063 | 3.27 ± 0.19 g | 0.36 ± 0.26c | 2.13 ± 0.09 cd | 63.10 ± 0.07 h | 9.70 ± 0.21c | 9.50 ± 0.35c | 7.72 ± 0.19 h | 3.71 ± 0.20f | 1.90 ± 0.08e |
| 5064 | 2.09 ± 0.06ij | 0.34 ± 0.24c | 3.35 ± 0.25b | 44.12 ± 0.08 l | 9.84 ± 0.12c | 14.60 ± 0.27a | 20.39 ± 0.28a | 2.23 ± 0.16 g | 1.44 ± 0.3ef |
Note: ECG = (−)-epicatechin-3-O-gallate, EGC = (−)-epigallocatechin, C = (+)-catechin, EC = (−)-epicatechin, different lowercase letters in the same column showed significant difference in Tukey multiple comparisons at P < 0.05 level.