Table 1 Phenolic compounds detected by HPLC in berry skin extracts. The values are expressed as HPLC areas. Different letters indicate significant differences (in bold) according to LSD multiple range test (95% confidence interval). Sample names: M = Mgt 101–14; P = 1103 Paulsen; NGC = not grafted control

Trans-caftaric acid

868 a

894 a

1373 b

584

547

623

HYDROXYCINNAMIC ACIDS

Cis-coutaric acid

140 a

157 a

210 b

64

66

80

Trans-coutaric acid

442 a

447 a

754 b

296

265

303

Epigallocatechin

104 c

53 a

77 b

22

45

42

FLAVANOLS

(+)-catechin

59 b

23 a

39 ab

17

48

19

Myricetin-3-O-glucoside

136 b

72 a

70 a

207

208

145

FLAVONOLS

Quercetin-3-O-rutinoside

59 a

40 a

101 b

17

31

23

Quercetin-3-O-galactoside

91 b

34 a

95 b

49

44

37

Quercetin-3-O-glucuronide

604 b

257 a

620 b

306

280

251

Quercetin-3-O-glucoside

611 b

324 a

919 c

232 ab

255 b

159 a

Kaempferol-3-O-glucoside

94 ab

46 a

119 b

65

51

47

Isorhamnetin-3-O-glucoside

94 b

47 a

62 ab

147

156

87

Total anthocyanins

7376 c

4853 b

1546 a

9047 b

11,230 b

5078 a

ANTHOCYANINS

Disubstituted anthocyanins

1711 c

1011 b

380 a

2530 b

3248 c

1430 a

Trisubstituted anthocyanins

5666 c

3842 b

1166 a

6517 b

7982 b

3648 a

Trisubstituted/disubstituted anthocyanins ratio

3,74

3,41

3,33

2,59

2,47

2,54

Delphinidin-3-glucoside

474 c

258 b

90 a

341 b

408 b

168 a

Cyanidin-3-glucoside

186 b

94 a

53 a

185 b

204 b

117 a

Petunidin-3-glucoside

591 c

321 b

109 a

477 b

568 b

244 a

Peonidin-3-glucoside

1525 c

916 b

327 a

2345 b

3044 c

1312 a

Malvidin-3-glucoside

3263 b

4601 b

967 a

5698 b

7006 b

3236 a

Trans-piceid

42

28

39

148 a

316 b

269 ab

STILBENES

Trans-ε-viniferin

14

19

24

18

31

42