Open Access

Table 1.

Effect of water supply on grape quality with respect to cultivar/rootstock combination.

Cultivar   Autumn Royal   Crimson Seedless   Summer Royal
Rootstock 140Ru   34EM 140Ru   34EM 140Ru  
Water supply SI DI FI   SI DI FI   SI DI FI   SI DI FI   SI DI FI   SI DI FI
Bunch 1200a 1900 2500 1600 2000 2600 900 1130 1800 990 1100 1500 400 550 780 570 400 730
weight (g) (600)b (800) (200) (300) (1000) (800) (200) (60) (400) (180) (200) (500) (110) (40) (130) (130) (110) (90)
Berry 5.0 7.8 8.6 7.3 8.1 8.2 4.8 5.99 6.1 4.8 5.7 6.4 4.1 5.3 7.2 3.6 5.85 6.8
weight (g) (0.2) (0.2) (0.3) (0.2) (0.8) (0.4) (0.5) (0.13) (0.5) (0.4) (0.4) (0.2) (0.3) (0.3) (0.5) (0.6) (0.19) (0.3)
pH 3.72 3.88 3.93 3.77 3.97 3.76 3.75 3.65 3.54 3.53 3.43 3.48 3.53 3.58 3.73 3.33 3.74 3.79
(0.06) (0.13) (0.04) (0.06) (0.06) (0.06) (0.05) (0.06) (0.04) (0.05) (0.04) (0.04) (0.04) (0.04) (0.04) (0.03) (0.03) (0.03)
Ac (g/L) 2.9 5.6 3.4 2.81 2.5 3.0 4.2 4.48 5.3 4.64 5.2 5.4 4.9 4.27 3.96 5.7 3.47 5.7
(0.3) (0.3) (0.2) (0.14) (0.3) (0.3) (0.3) (0.17) (0.3) (0.13) (0.4) (0.4) (0.3) (0.18) (0.18) (0.4) (0.19) (0.3)
TSSd (°Brix) 14.0 15.4 15.2 14.2 15.9 14.6 22.3 17.5 17.3 17.8 17.5 18.5 15.1 21.2 19.9 16.2 20.8 18.8
(0.9) (0.4) (0.4) (0.4) (0.4) (0.6) (1.4) (0.9) (0.6) (0.4) (0.4) (0.7) (0.4) (0.6) (0.6) (0.4) (0.4) (0.6)
RPe (-kg) 0.12 0.11 0.13 0.014 0.015 0.12 0.18 0.17 0.30 0.17 0.19 0.28 0.11 0.23 0.16 0.16 0.16 0.19
(0.04) (0.03) (0.03) (0.02) (0.05) (0.02) (0.06) (0.15) (0.04) (0.02) (0.02) (0.05) (0.02) (0.06) (0.05) (0.04) (0.04) (0.03)
RSf (-kg) 1.4 2.2 2.3 1.7 2.9 2.2 1.2 1.9 2.1 1.8 1.9 2.3 1.2 1.1 1.6 1.3 1.7 1.2
(0.3) (0.6) (0.4) (0.4) (1.6) (0.3) (0.4) (1.1) (0.6) (0.18) (0.2) (0.6) (0.2) (0.4) (0.3) (0.10) (0.2) (0.4)
RDg (kg) 0.6 0.9 0.5 0.5 0.6 0.3 1.0 1.2 1.1 0.3 0.5 0.6 0.6 0.6 0.9 0.7 0.5 0.7
(0.3) (0.5) (0.3) (0.08) (0.13) (0.11) (0.4) (0.5) (0.2) (0.14) (0.2) (0.3) (0.13) (0.3) (0.14) (0.06) (0.3) (0.3)
TPPh (mg/g) 8.7 9.6 6.2 7.7 9.0 6.7 3.3 2.2 2.0 2.6 2.9 1.8 10.2 9.1 6.9 23 10.2 7.2
(0.03) (0.3) (0.3) (0.15) (0.8) (0.4) (0.10) (0.8) (0.3) (0.13) (0.15) (0.2) (1.1) (0.4) (0.11) (5) (0.5) (0.7)
ATi (mg/g) 7.227 4.943 4.28 5.090 4.60 4.555 0.884 1.0 0.633 0.880 0.730 0.605 4.49 7.40 5.477 2.52 6.79 6.0
(0.004) (0.011) (0.02)   (0.016) (0.07) (0.019)   (0.011) (0.3) (0.018)   (0.006) (0.012) (0.007)   (0.07) (0.04) (0.017)   (0.10) (0.08) (0.3)
Significance
Bunch weight Berry weight pH A TSS RP RS RD TPP
  *** *** *** *** *** *** ** n.s. ***
n.s. * *** n.s. * n.s. n.s. *** ***
*** *** *** * *** * * n.s. ***
n.s. ** *** *** * n.s. n.s. ** ***
n.s. *** *** *** *** * n.s. n.s. ***
n.s. * ** *** * n.s. n.s. n.s. ***
  n.s. *** *** *** *** n.s. n.s. n.s. ***

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