Table 5.
Results from UV-Vis determination of colour parameters and polyphenols. The statistical analysis is given by parameter (columns) and the difference in letters indicates significant statistical difference (LSD method with 95% confidence level). Means ± STD (n = 3).
| Treatment | I AU |
N | ± % | TPI AU |
ChA | PI % |
PP AU |
TP AU |
|---|---|---|---|---|---|---|---|---|
| CAT | ||||||||
| Sc | 0.78 ± 0.0 bc | 1.59 ± 0.0 c | 17.76 ± 0.8 bc | 13.81 ± 0.1 b | 0.13 ± 0.0 bc | 12.77 ± 0.6 de | 0.13 ± 0.0 bc | 1.03 ± 0.1 a |
| Lt-Sc | 0.80 ± 0.0 ab | 1.65 ± 0.0 c | 30.84 ± 1.8 a | 13.41 ± 0.1 b | 0.23 ± 0.0 a | 23.12 ± 0.6 ab | 0.15 ± 0.0 a | 0.66 ± 0.0 d |
| Lt-Sp | 0.82 ± 0.0 ab | 2.25 ± 0.0 ab | 23.53 ± 3.6 b | 14.77 ± 0.1 a | 0.25 ± 0.0 a | 25.27 ± 2.2 a | 0.15 ± 0.0 a | 0.59 ± 0.0 d |
| PB2 | ||||||||
| Sc | 0.71 ± 0.1 d | 1.59 ± 0.0 c | 16.39 ± 0.2 c | 13.70 ± 0.5 b | 0.12 ± 0.0 c | 11.80 ± 0.7 e | 0.12 ± 0.0 c | 1.02 ± 0.1 ab |
| Lt-Sc | 0.81 ± 0.0 ab | 1.64 ± 0.0 c | 22.86 ± 2.2 bc | 13.39 ± 0.0 b | 0.19 ± 0.0 b | 19.17 ± 1.1 bc | 0.16 ± 0.0 a | 0.82 ± 0.1 c |
| Lt-Sp | 0.84 ± 0.0 a | 2.17 ± 0.0 b | 22.68 ± 4.2 bc | 15.04 ± 0.2 a | 0.25 ± 0.0 a | 24.61 ± 1.3 a | 0.16 ± 0.0 a | 0.64 + 0.1 d |
| PC1 | ||||||||
| Sc | 0.74 ± 0.0 cd | 1.64 ± 0.0 c | 18.49 ± 1.6 bc | 13.61 ± 0.1 b | 0.13 ± 0.0 bc | 12.84 ± 0.6 de | 0.12 ± 0.0 c | 0.95 ± 0.1 b |
| Lt-Sc | 0.80 ± 0.0 ab | 1.65 ± 0.0 c | 22.48 ± 1.2 bc | 13.36 ± 0.1 b | 0.18 ± 0.0 b | 18.44 ± 0.4 c | 0.15 ± 0.0 a | 0.82 ± 0.0 c |
| Lt-Sp | 0.84 ± 0.0 a | 2.20 ± 0.1 ab | 24.53 ± 2.9 ab | 14.64 ± 0.3 a | 0.27 ± 0.0 a | 26.70 ± 2.7 a | 0.16 ± 0.0 a | 0.59 ± 0.0 d |
| PA2 | ||||||||
| Sc | 0.75 ± 0.0 cd | 1.64 ± 0.0 c | 20.60 ± 1.2 bc | 13.81 ± 0.1 b | 0.16 ± 0.0 ab | 15.84 ± 0.7 cd | 0.14 ± 0.0 b | 0.85 ± 0.0 c |
| Lt-Sc | 0.82 ± 0.0 ab | 1.66 ± 0.0 c | 23.22 ± 2.5 b | 13.38 ± 0.2 b | 0.19 ± 0.0 b | 19.05 ± 1.9 c | 0.16 ± 0.0 a | 0.82 ± 0.1 c |
| Lt-Sp | 0.84 ± 0.0 a | 2.26 ± 0.0 a | 21.77 ± 2.0 bc | 14.86 ± 0.2 a | 0.25 ± 0.0 a | 25.31 ± 0.9 a | 0.16 ± 0.0 a | 0.62 ± 0.0 d |
I: Colour intensity; N: Hue (N); α: anthocyanin ionization degree; TPI: total polyphenols index; ChA: chemical age; PI: polymerization index; PP: polymerized pigments; TP: total pigments.