TABLE 3.
Parameters of grape composition at harvest for Tempranillo wine grapes grafted onto M1, M4, and 1103-Paulsen (1P) rootstocks subjected to different water quality (C; control and S; saline irrigation) in Valencia, Spain.
| Factors | Treatment | Berry weight (g) | TSS (°) | T.A. (g L–1) | pH | Anthocyanins (mg g–1) | Polyphenols (mg g–1) |
| R | 1P | 1.6 | 20.1a | 3.8 | 4.17 | 0.74c | 4.83b |
| M1 | 1.6 | 20.6b | 3.3 | 4.17 | 0.53b | 4.08a | |
| M4 | 1.7 | 20.9b | 3.6 | 4.16 | 0.44a | 3.73a | |
| WQ | Control | 1.7 | 20.2a | 3.5 | 4.17 | 0.60 | 4.34 |
| Saline | 1.6 | 20.8b | 3.7 | 4.16 | 0.54 | 4.08 | |
| Interaction R × WQ |
1P C | 1.67 | 19.9a | 3.7 | 4.15 | 0.83 | 5.14d |
| 1P S | 1.61 | 20.2ab | 3.9 | 4.19 | 0.65 | 4.51c | |
| M1 C | 1.64 | 19.8a | 3.2 | 4.22 | 0.55 | 4.35bc | |
| M1 S | 1.51 | 21.4c | 3.4 | 4.12 | 0.52 | 3.81a | |
| M4 C | 1.70 | 20.9bc | 3.5 | 4.15 | 0.42 | 3.54a | |
| M4 S | 1.60 | 20.8bc | 3.7 | 4.16 | 0.45 | 3.92ab | |
| Rootstock | 0.75 | <0.01 | 0.19 | 0.96 | <0.001 | <0.001 | |
| Water Quality | 0.29 | <0.01 | 0.38 | 0.70 | 0.13 | 0.07 | |
| R × WQ | 0.94 | <0.01 | 0.99 | 0.30 | 0.09 | 0.02 |
TSS, total soluble solids; T.A., titratable acidity. Data are averages of 6, 9, and 3 determinations per rootstock, water quality and rootstock per water quality respectively. Within each parameter, letters denote significant differences between treatments at p < 0.05 (Duncan test). The statistical significance effect of the rootstock (R), water quality (WQ) and their interaction are also indicated by means of the p-values from the ANOVAs. Significance of effects in bold denotes statistically significant differences at p < 0.05.