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. 2017 Jul 7;5:48. doi: 10.3389/fchem.2017.00048

Table 1.

Summary of grape and wine chemical parameters.

Sampling time 2010–2011 vintagea 2015–2016 vintageb
Ctrl TD-vc Ctrl TD-v TB-v TD-m TB-m
GRAPE PARAMETERS
Berry weight (100 berries) Veraison 161.6 148.0 81.0 ± 4.9 79.1 ± 8.0 86.0 ± 24.3 n/ad n/a
2 weeks Post Veraison 185.0 190.2 121.4 ± 13.4 129.28 ± 10.0 131.3 ± 12.7 126.6 ± 11.1 132.9 ± 6.7
4 weeks Post Veraison 171.2 173.8 126.1 ± 9.5 128.8 ± 17.3 134.4 ± 16.1 123.8 ± 12.7 116.5 ± 20.5
Harvest 159.8 164.4 107.4 ± 3.4 110.1 ± 9.2 119.5 ± 9.3 110.4 ± 8.2 113.8 ± 7.9
°Brix Veraison 14.2 13.9 11.0 ± 0.3 11.4 ± 0.4 11.5 ± 0.5 n/a n/a
2 weeks Post Veraison 18.3 17.3 16.4 ± 1.4 15.7 ± 0.7 15.7 ± 0.5 15.5 ± 0.4 15.3 ± 0.3
4 weeks Post Veraison 20.8 20.2 20.7 ± 0.5 20.7 ± 0.4 20.4 ± 1.0 20.6 ± 0.6 20.6 ± 0.8
Harvest 22.0 21.2 23.2 ± 0.5 22.9 ± 0.7 23.2 ± 1.0 22.5 ± 0.5 22.6 ± 0.5
pH Veraison 2.84 2.81 2.71 ± 0.04 2.71 ± 0.01 2.71 ± 0.06 n/a n/a
2 weeks Post Veraison 3.06 3.02 3.19 ± 0.08 3.17 ± 0.05 3.11 ± 0.09 3.12 ± 0.05 3.11 ± 0.03
4 weeks Post Veraison 3.20 3.16 3.49 ± 0.02 3.5 ± 0.09 3.48 ± 0.1 3.51 ± 0.14 3.42 ± 0.04
Harvest 3.36 3.39 3.79 ± 0.06b 3.94 ± 0.23ab 4.14 ± 0.22a 4.06 ± 0.1ab 4.01 ± 0.07ab
TA Veraison 14.21 14.33 6.16 ± 0.35 6.38 ± 0.35 6.84 ± 0.35 n/a n/a
2 weeks Post Veraison 9.30 9.50 6.55 ± 0.85 6.42 ± 0.63 6.78 ± 0.56 7 ± 0.59 7.05 ± 0.08
4 weeks Post Veraison 7.70 7.75 4.49 ± 0.08 4.48 ± 0.26 4.48 ± 0.29 4.43 ± 0.37 4.84 ± 0.37
Harvest 7.25 6.60 3.84 ± 0.17a 3.06 ± 0.6b 2.6 ± 0.22b 2.59 ± 0.31b 2.85 ± 0.25b
Total anthocyanins (mg/g) Harvest 1.68 1.28 0.7 ± 0.11 0.67 ± 0.06 0.62 ± 0.06 0.67 ± 0.08 0.64 ± 0.08
Total phenolics (a.u./g) Harvest n/a n/a 0.35 ± 0.04 0.32 ± 0.02 0.32 ± 0.03 0.34 ± 0.02 0.31 ± 0.04
WINE PARAMETERS
Total phenolics (a.u.) Finished Wine n/a n/a 34.78 ± 5.91 35.27 ± 5.51 37.42 ± 5.49 34.78 ± 3.03 36.61 ± 3.63
Wine color density Finished Wine 11.04 9.01 5.56 ± 0.8 5.61 ± 0.57 5.5 ± 0.22 5.47 ± 0.5 5.88 ± 0.6
Total red pigments (a.u.) Finished Wine 16.78 13.06 11.24 ± 3.15 11.22 ± 2.26 12.33 ± 1.9 11.77 ± 1.36 12.31 ± 2.06
Wine color hue Finished Wine 0.75 0.73 0.61 ± 0.04 0.62 ± 0.04 0.6 ± 0.04 0.58 ± 0.03 0.6 ± 0.03
Degree of red pigment coloration (%) Finished Wine 37.67 40.00 31.86 ± 6.11 31.44 ± 3.51 28.21 ± 3.29 29.5 ± 2.56 30.11 ± 2.16
Alcohol (% v/v) Finished Wine 12.40 11.72 13.27 ± 0.69 12.94 ± 0.43 13.28 ± 0.54 13.06 ± 0.17 13.28 ± 0.24
a

Replicates if Grape samples in each group in the 2010–2011 vintage were mixed in to one sample and analyzed for the biochemical composition.

b

One-way ANOVA conduced for the samples in the 2015–2016 vintage at p < 0.05, a, b were used to indicate statistically significant differences.

c

Control group (Ctrl), basal leaves removal at veraison (TB-v) at mid ripeness (TB-m), apical leaves removal at veraison (TD-v) at mid ripeness (TD-m).

d

n/a, not available.