Table 1.

Total flavonols (Flav) at maturity in Tempranillo Blanco and Tinto grapevine. Treatments used for growing the plants were as follows: ambient CO₂ concentration (ACO₂, 400 ppm) versus elevated (ECO₂, 700 ppm), ambient temperature (T) versus ambient + 4 °C (T + 4 °C), and full irrigation (FI) versus cyclic drought (CD). Significant differences (p < 0.05) were based on LSD test (n = 3, mean ± SE) and are indicated by different letters. Means without letters or with common letters are not statistically different. Main factors and interactions (p-values) that were not significant are not shown. Data were obtained by T. Kizildeniz during her PhD thesis following the procedure described in Hilbert et al. [38].

				Flav (mg g−1 Skin DW)	Flav (mg g−1 Skin DW)
				2013–2015	2013	2014	2015
Tinto	T	ACO2	FI	2.61 ± 0.94 abc	1.54 ± 0.08 bc	1.79 ± 0.28 bc	4.49 ± 0.98 ab
			CD	2.74 ± 0.76 ab	2.22 ± 0.15 a	1.76 ± 0.18 bc	4.24 ± 0.78 abc
		ECO2	FI	2.44 ± 0.68 abc	1.53 ± 0.32 bc	2.03 ± 0.42 bc	3.76 ± 0.61 abc
			CD	3.06 ± 0.51 a	2.30 ± 0.41 a	2.84 ± 0.65 a	4.04 ± 0.39 abc
	T + 4 °C	ACO2	FI	2.47 ± 0.63 abc	1.52 ± 0.05 bc	2.20 ± 0.04 ab	3.67 ± 0.47 a–d
			CD	2.08 ± 0.71 abc	1.15 ± 0.15 cd	1.61 ± 0.28 bcd	3.47 ± 0.92 a–f
		ECO2	FI	2.41 ± 0.56 abc	1.80 ± 0.34 ab	1.91 ± 0.20 bc	3.53 ± 0.67 a–e
			CD	2.69 ± 0.95 ab	1.94 ± 0.26 ab	1.56 ± 0.12 b–e	4.57 ± 0.91 a
Blanco	T	ACO2	FI	0.94 ± 0.25 c	0.53 ± 0.12 e	0.89 ± 0.18 def	1.39 ± 0.14 g
			CD	1.89 ± 0.51 abc	1.48 ± 0.36 bc	1.29 ± 0.25 c–f	2.91 ± 0.31 b–g
		ECO2	FI	1.14 ± 0.47 bc	0.49 ± 0.06 e	0.86 ± 0.05 def	2.06 ± 0.34 d–g
			CD	1.33 ± 0.31 abc	0.79 ± 0.12 de	1.33 ± 0.31 c–f	1.85 ± 0.30 fg
	T + 4 °C	ACO2	FI	1.22 ± 0.32 bc	0.64 ± 0.06 de	1.29 ± 0.12 c–f	1.74 ± 0.19 g
			CD	0.93 ± 0.24 c	0.59 ± 0.10 de	0.81 ± 0.05 ef	1.39 ± 0.24 g
		ECO2	FI	1.14 ± 0.45 bc	0.56 ± 0.14 de	0.83 ± 0.15 ef	2.02 ± 0.37 efg
			CD	1.32 ± 0.74 bc	0.43 ± 0.04 e	0.73 ± 0.15 f	2.79 ± 0.26 c–g
Cultivar				0.000	<0.0001	<0.0001	<0.0001
CO2				0.788	0.838	0.662	0.559
Temp				0.442	0.012	0.087	0.491
Irrigation				0.491	0.011	0.876	0.255
Cultivar × CO2				0.746	0.017	0.161	0.585
Cultivar × Temp				0.833	0.901	0.684	0.657
Cultivar × Irrigation				0.874	0.862	0.679	0.701
CO2 × Temp				0.660	0.087	0.042	0.088
CO2 × Irrigation				0.724	0.888	0.150	0.608
Temp × Irrigation				0.384	0.001	0.005	0.964
Cultivar × CO2 × Temp				0.916	0.545	0.295	0.939
Cultivar × CO2 × Irrigation				0.554	0.122	0.557	0.297
Cultivar × Temp × Irrigation				0.872	0.782	0.790	0.457
CO2 × Temp × Irrigation				0.562	0.252	0.781	0.123
Cultivar × CO2 × Temp × Irrigation				0.663	0.858	0.394	0.349