Table 4.
Phenolic composition and antioxidant capacity from fruit-bearing cuttings of genotypes from seven local old grapevine varieties recovered in Navarre (Spain) grown under two climate scenarios during berry ripening: (1) ambient CO2 (400 ppm) and ambient temperature (T) (ACAT) and (2) elevated CO2 (700 ppm) and elevated temperature (T + 4 °C) (ECET). Genotype labels can be found in Table 5.
| Varieties | TPI (AU) | Total Anthocyanins (mg L−1) | Extractable Anthocyanins (mg L−1) | EA (%) | SM (%) | Total Antioxidant Capacity (mg L−1) |
|---|---|---|---|---|---|---|
| TEMP | 39.3 a 1 | 321.8 b | 237.1 b | 29.5 bc | 74.6 b | 19.0 b |
| TV | 10.0 d | 171.6 c | 107.9 c | 43.1 a | 62.7 bcd | 18.9 b |
| GRA72 | 25.7 bc | 440.6 a | 300.2 a | 32.7 ab | 52.5 cd | 17.6 b |
| GRA63 | 30.6 b | 446.8 a | 298.5 a | 36.1 ab | 58.6 d | 29.8 a |
| PAS | 26.1 bc | 165.4 c | 143.4 c | 13.7 d | 72.4 b | 20.2 b |
| AMB | 19.1 c | 158.5 c | 131.0 c | 20.1 cd | 69.5 bc | 19.7 b |
| TOR | 17.3 cd | 29.0 d | 24.9 d | 15.9 d | 90.8 a | 8.4 c |
| Treatment | ||||||
| ACAT | 27.8 a | 266.5 a | 211.5 a | 24.6 a | 67.6 a | 18.8 a |
| ECET | 20.7 b | 217.7 b | 149.1 b | 29.5 a | 71.2 a | 18.3 a |
| ANOVA 2 | ||||||
| Genotype (G) | *** | *** | *** | *** | *** | *** |
| Treatment (T) | ** | *** | *** | ns | ns | ns |
| G × T | ns | *** | ** | ** | ns | *** |
1 Values represent means. Within columns, means followed by the same letter do not differ significantly (p ≥ 0.05) according to Duncan’s test as affected by the main factors genotype (G) (n = 8–12), treatment (T) (n = 34) and their interaction (G × T). 2 Significance of the analysis of variance (ANOVA): ** p < 0.01; *** p < 0.001; ns, not significant (p ≥ 0.05). TPI, total polyphenol index; EA, cellular extractability of anthocyanins; SM, seed maturity; AU, absorbance units.