. 2024 Mar 15;15:1369658. doi: 10.3389/fpls.2024.1369658

Table 2.

Total ascorbic acid (TAA) and total anthocyanin content in commercial lettuce varieties and some wild relatives (Lactuca spp.) under control (C) and drought stress (DI) conditions in a 2-year experiment.

			2020/2021				2021/2022
			TAA (mg 100 g⁻¹ DW)		Anthocyanins (mg 100 g⁻¹ DW)		TAA (mg 100 g⁻¹ DW)		Anthocyanins (mg 100 g⁻¹ DW)
Name	Group	Tissue	C	DI	C	DI	C	DI	C	DI
‘Dolomiti G12’	Green commercial variety	Leaf	251.73 ± 39.06^cd	195.60 ± 11.48^ab	ND	ND	245.02 ± 7.42^cd	231.17 ± 3.65^ab	ND	ND
‘Winter Crop’	Green commercial variety	Leaf	322.58 ± 50.82^b	188.79 ± 17.72 ^ab	ND	ND	248.03 ± 21.7^b	239.73 ± 26.89^ab	ND	ND
‘Lollo Rosso’	Red commercial variety	Leaf	225.80 ± 21.35^d	206.65 ± 12.01^a	70.27 ± 43.44^ab	74.41 ± 6.17^cd	221.14 ± 11.96^d	204.49 ± 18.07^a	3.01 ± 1.94^b	4.32 ± 2.88^c
‘Red Sails’		Leaf	298.34 ± 11.39^bc	195.32 ± 33.65^ab	260.8 ± 179.35^a	356.9 ± 63.9^a	302.43 ± 39.28^bc	251.5 ± 24.22^ab	15.21 ± 6.96^a	26.55 ± 8.75^a
‘Romired’		Leaf	253.95 ± 65.63^cd	213.95 ± 7.31^a	147.02 ± 68.19^a	180.09 ± 29.63^bc	237.04 ± 12.06^cd	206.14 ± 47.77^a	31.67 ± 5.54^a	35.57 ± 12.6^a
L. homblei	Wild crop relative	Leaf	453.85 ± 25.56^a	224.09 ± 59.18^a	32.41 ± 16.59^bc	232.29 ± 122.05^b	345.53 ± 20.25^a	285.14 ± 20.94^a	3.8 ± 0.52^b	7.02 ± 0.55^bc
L. dregeana		Leaf	355.70 ± 8.55^b	124.87 ± 65.72^b	10.7 ± 7.98^c	21.23 ± 7.59^d	300.99 ± 13.88^b	187.01 ± 28.76^b	4.06 ± 3.24^b	11.22 ± 3.44^b
L. dregeana		Stem	72.84 ± 6.13	33.36 ± 5.24	16.97 ± 8.07	9.82 ± 3.86	126.83 ± 11.79	62.63 ± 24.74	12.18 ± 4.25	7.93 ± 2.73

Different letters indicate significant differences among accessions within each treatment (C, DI) at p < 0.05 for leaf samples.

ND: not detected.