Table 2.
Values of color attributes in bog bilberry juice after inoculating with three lactic acid bacteria strains in 14 days.
| Compound | Strain | Time (Day) | |||||
|---|---|---|---|---|---|---|---|
| 0 | 1 | 2 | 3 | 7 | 14 | ||
| L* value | L. brevis | 46.34 ± 1.18 Aa | 44.95 ± 0.94 Aa | 46.69 ± 1.54 Aa | 45.97 ± 0.77 Aa | 46.41 ± 0.65 Aa | 51.02 ± 1.94 Ab |
| L. acidophilus | 46.34 ± 1.18 Aa | 49.05 ± 0.47 Bb | 49.14 ± 1.56 ABb | 49.14 ± 0.93 Bb | 50.29 ± 0.90 Bb | 51.00 ± 0.38 Ab | |
| O. oeni | 46.34 ± 1.18 Aa | 51.90 ± 0.51 Cbc | 51.55 ± 0.70 Cb | 51.10 ± 0.98 Cb | 52.31 ± 0.14 Cbc | 53.04 ± 0.64 Ac | |
| a* value | L. brevis | 60.34 ± 0.02 Ab | 60.66 ± 0.06 Cb | 60.47 ± 0.17 Cb | 60.37 ± 0.12 Cb | 60.06 ± 0.05 Cb | 58.71 ± 1.01 Aa |
| L. acidophilus | 60.34 ± 0.02 Ac | 60.19 ± 0.05 Bc | 60.06 ± 0.28 Bc | 59.92 ± 0.16 Bbc | 59.37 ± 0.14 Bab | 58.85 ± 0.72 Aa | |
| O. oeni | 60.34 ± 0.02 Ad | 59.61 ± 0.15 Ac | 59.55 ± 0.11 Ac | 59.40 ± 0.20 Ac | 58.69 ± 0.17 Ab | 57.56 ± 0.38 Aa | |
| b* value | L. brevis | 2.24 ± 0.71 Ab | 4.64 ± 0.29 Bc | 4.14 ± 0.80 Bc | 3.62 ± 0.22 Bc | 2.50 ± 0.15 Bb | −0.60 ± 0.90 Aa |
| L. acidophilus | 2.24 ± 0.71 Ab | 2.68 ± 0.26 Ab | 2.60 ± 0.83 Ab | 2.22 ± 0.44 Ab | 1.55 ± 0.68 Aab | 0.73 ± 1.16 Aa | |
| O. oeni | 2.24 ± 0.71 Ac | 2.06 ± 0.48 Ac | 2.00 ± 0.25 Ac | 1.61 ± 0.39 Ac | 0.61 ± 0.44 Ab | −0.47 ± 0.38 Aa | |
| ΔE* value | L. brevis | — | 2.85 ± 0.70 Ab | 2.73 ± 0.54 Aab | 1.55 ± 0.38 Aab | 0.64 ± 0.26 Aa | 5.75 ± 2.20 Ac |
| L. acidophilus | — | 2.76 ± 0.46 Aa | 2.92 ± 1.56 Aa | 2.86 ± 0.96 Aa | 4.17 ± 0.84 Bab | 5.21 ± 0.73 Ab | |
| O. oeni | — | 5.63 ± 0.55 Bab | 5.28 ± 0.71 Bab | 4.90 ± 1.05 Ba | 6.42 ± 0.22 Cb | 7.75 ± 0.81 Cc | |
Data are mean ± standard deviation of triplicate tests; Different letters in lower case indicate significant differences with time, whereas different letters in upper case represent significant difference in juice inoculated with different strains at the same sampling interval at p < 0.05. L* represents brightness, larger the data of L* is, lighter the color will be. A* represents the color of red and green, larger the data of a* is, redder the color will be, otherwise, greener it will be. B* represents the color of yellow and blue, larger the data of b* is, yellower the color will be, otherwise, bluer it will be. ΔE* describes the degree of deviation from the original wine color, larger the data of ΔE* is, greater the color variation will be.