TABLE 5.
Percentage of total non-structural carbohydrates (NSC) in the leaves, shoots, and roots of Cabernet Sauvignon grapevines (clone FPS08) subjected to different replacements of crop evapotranspiration (25% ETc, 50% ETc, and 100% ETc) during two growing seasons (2018–2019 and 2019–2020) and harvested in Oakville, CA, United States, in October 2020.
| % of total NSC |
|||||
| D-Fructose | D-Glucose | D-Sucrose | D-Raffinose | Starch | |
| Leaf | |||||
| 25% ETc | 26.91 ± 1.77 | 35.59 ± 3.10 | 19.06 ± 4.86 | 14.58 ± 0.54 | 3.86 ± 0.73c |
| 50% ETc | 30.38 ± 1.34 | 34.61 ± 0.88 | 12.32 ± 1.84 | 15.24 ± 1.17 | 7.45 ± 0.91b |
| 100% ETc | 26.96 ± 1.29 | 35.79 ± 1.40 | 9.53 ± 1.38 | 14.80 ± 0.79 | 12.92 ± 1.67a |
| ANOVA | Ns | ns | ns | ns | *** |
| Shoot | |||||
| 25% ETc | 15.99 ± 0.63 | 22.79 ± 0.80 | 2.69 ± 0.24b | 1.65 ± 0.11b | 56.89 ± 1.24 |
| 50% ETc | 16.05 ± 0.85 | 21.42 ± 0.95 | 6.94 ± 0.76a | 2.60 ± 0.33a | 52.99 ± 1.24 |
| 100% ETc | 14.45 ± 1.62 | 20.35 ± 1.68 | 6.72 ± 0.65a | 3.31 ± 0.25a | 55.16 ± 2.87 |
| ANOVA | Ns | ns | *** | *** | ns |
| Root | |||||
| 25% ETc | 3.35 ± 0.43 | 4.14 ± 0.34 | 24.82 ± 2.01 | 2.52 ± 0.23 | 64.98 ± 2.38 |
| 50% ETc | 3.99 ± 0.80 | 4.77 ± 0.61 | 24.11 ± 1.02 | 2.96 ± 0.46 | 64.16 ± 2.23 |
| 100% ETc | 2.83 ± 0.37 | 4.31 ± 0.48 | 20.91 ± 0.66 | 2.43 ± 0.22 | 69.51 ± 1.14 |
| ANOVA | Ns | ns | ns | ns | ns |
Values represent means (n = 6) separated by Duncan’s new multiple range test (p ≤ 0.05). Different letters within each column indicate significant differences as affected by the different irrigation amounts. ns and *** indicate non-significance or significance at 0.1% probability levels, respectively. DW, dried weight.