Table 1: Changes in anthocyanins content (expressed as μg/g of dry skins) in Crimson Seedless grapes from véraison to maturity.

2017 Sampling Date 2nd August 8th August 21st August 19th September 6th October 12nd October
Compoundsf T1 T2 T1 T2 T1 T2 T1 T2 T1 T2 T1 T2
TSSa 12.0b(1.2)c 14.5(0.5) 15.0(1.8) 15.9(0.8) 16.6(1.8) 18.7(0.9) 21.3(0.7) 21.4(0.8) 20.6(1.0) 21.6(0.5) 19.8(1.0) 20.8(1.3)
pH 2.73(0.05) 2.77(0.07) 3.00(0.10) 3.04(0.04) 3.25(0.02) 3.30(0.02) 3.38(0.04) 3.45(0.03) 3.44(0.07) 3.52(0.05) 3.44(0.05) 3.38(0.03)
TAd 16.4(1.5) 13.1(1.2) 11.4(1.6) 10.0(0.4) 9.6(1.0) 8.4(0.3) 7.0(0.2) 6.58(0.10) 6.3(0.3) 5.8(0.2) 6.6(0.5) 5.7(0.4)
TSS/TAe 7.3(1.9) 11.1(1.2) 13(3) 15.9(1.0) 17(2) 22.3(0.8) 30.6(0.6) 32.5(0.5) 32.9(1.0) 37.2(0.6) 30.2(1.3) 36.2(1.3)
Delphinidin-3O-glucoside n.d. n.d. n.d. n.d. 0.77(0.17)
dg
2.2(1.4)
c
2.1(0.4)
c
2.4(0.5)
c
3.0(0.9)
bc
4.6(0.9)
ab
3.2(0.6)
bc
5.6(0.5)
a
Cyanidin-3O-glucoside 5.0(1.6)
d
12(5)
cd
16(7)
c
31(8)
c
22(6)
c
68(17)
bc
24(5)
c
90(30)
b
29(5)
c
200(60)
a
31(4)
c
290(120)
a
Petunidin-3O-glucoside 1.8(0.3)
d
2.6(0.9)
d
2.7(1.3)
d
5.1(1.5)
cd
5.1(0.8)
cd
12(3)
b
6.4(0.7)
c
13(3)
b
8(2)
c
19(8)
ab
7.1(0.7)
c
25(4)
a
Peonidin-3O-glucoside 290(50)
d
460(70)
cd
500(200)
cd
1200(160)
bc
700(200)
c
1900(300)
b
800(300)
c
2400(700)
ab
1100(300)
bc
2500(800)
ab
1600(400)
bc
3000(500)
a
Malvidin-3O-glucoside 12(4)
d
18(3)
d
19(8)
d
37(6)
c
25(7)
cd
53(19)
c
30(10)
cd
74(15)
bc
45(12)
c
90(20)
b
39(7)
c
140(30)
a
Peonidin-3O-acetyl-glucoside 1.9(0.6)
d
3.2(0.5)
cd
2.3(0.6)
d
7.4(1.4)
bc
3.8(0.4)
c
13(3)
ab
4.5(1.1)
c
15(4)
ab
7.0(1.1)
bc
16(6)
a
7.6(1.1)
bc
19(4)
a
Malvidin-3O-acetyl-glucoside 1.0(0.3)
e
2.4(1.2)
e
1.4(0.3)
e
6.8(1.7)
c
3.0(0.3)
de
13(3)
b
3.3(1.3)
de
13.6(1.6)
b
4.0(1.5)
d
19(8)
ab
4.8(0.4)
d
26(6)
a
Peonidin-3O-p-coumaroyl-glucoside 1.1(0.3)
d
3.9(1.6)
d
3.2(0.9)
d
10.4(0.8)
c
11(4)
c
11(3)
c
11(2)
c
21(8)
b
15(2)
bc
23(10)
b
17.6(1.4)
bc
41(12)
a
Malvidin-3O-p-coumaroyl-glucoside n.d. n.d. n.d. n.d. 2.0(0.4) 1.9(0.4) 2.0(0.5) 2.5(0.6) 2.4(0.6) 2.7(0.5) 3.6(1.3) 4(2)

a Total soluble solid are expressed in °Brix; b Means of three replicates; c Standard deviation at p ≤ 0.05; d Total acidity expressed in g/L as tartaric acid; e Maturation index; f Expressed as cyanidin-3O-glucoside equivalents; g Different letters in the same raw are significantly different (Tukey HSD test).
T1: untreated samples (control).
T2: treated samples with PhCO2.
n.d.: not detected.