Table 3.
Discriminant phenolic compounds identified by VIP (variable importance in projection) analysis following OPLSDA of different plant organs. Compounds are provided together with VIP scores (measure of variable’s importance in the OPLSDA model)
| Phenolic class | Phenolic subclass | Marker | Vip score |
|---|---|---|---|
| Flavonoids | Anthocyanins | Cyanidin 3-O-(6″-acetyl-glucoside) | 1.37 ± 0.26 |
| Cyanidin 3-O-(6″-succinyl-glucoside) | 1.33 ± 0.12 | ||
| Cyanidin 3-O-rutinoside | 1.30 ± 0.20 | ||
| Petunidin 3-O-rutinoside | 1.30 ± 0.20 | ||
| Pelargonidin 3-O-sophoroside | 1.30 ± 0.20 | ||
| Delphinidin 3-O-rutinoside | 1.30 ± 0.20 | ||
| Cyanidin 3,5-O-diglucoside | 1.30 ± 0.20 | ||
| Petunidin 3-O-(6″-acetyl-glucoside) | 1.27 ± 0.25 | ||
| Pelargonidin 3-O-(6″-malonyl-glucoside) | 1.23 ± 0.33 | ||
| Flavanones | Eriocitrin | 1.30 ± 0.20 | |
| Neoeriocitrin | 1.30 ± 0.20 | ||
| 6-Geranylnaringenin | 1.26 ± 0.23 | ||
| Hesperetin | 1.26 ± 0.16 | ||
| Didymin | 1.24 ± 0.22 | ||
| Flavones | Chrysoeriol 7-O-(6″-malonyl-glucoside) | 1.41 ± 0.25 | |
| Luteolin 7-O-(2-apiosyl-6-malonyl)-glucoside | 1.33 ± 0.19 | ||
| Luteolin 7-O-rutinoside | 1.30 ± 0.19 | ||
| Apigenin 6,8-di-C-glucoside | 1.30 ± 0.19 | ||
| Tangeretin | 1.25 ± 0.21 | ||
| Sinensetin | 1.21 ± 0.21 | ||
| Flavonols | Kaempferide | 1.35 ± 0.16 | |
| Quercetin 3-O-(6″-acetyl-galactoside) 7-O-rhamnoside | 1.32 ± 0.34 | ||
| Kaempferol 3-O-rutinoside | 1.30 ± 0.19 | ||
| Kaempferol 3-O-acetyl-glucoside | 1.21 ± 0.42 | ||
| Quercetin 3-O-acetyl-rhamnoside | 1.21 ± 0.41 | ||
| Isoflavonoids | 6″-O-Malonylgenistin | 1.25 ± 0.30 | |
| 6″-O-Acetylglycitin | 1.24 ± 0.22 | ||
| 6″-O-Acetyldaidzin | 1.24 ± 0.34 | ||
| Lignans | – | Dimethylmatairesinol | 1.32 ± 0.18 |
| Sesamolinol | 1.25 ± 0.21 | ||
| Secoisolariciresinol-sesquilignan | 1.24 ± 0.24 | ||
| Phenolic acids | Hydroxycinnamics | Ferulic acid 4-O-glucoside | 1.39 ± 0.28 |
| 1,2-Disinapoylgentiobiose | 1.31 ± 0.19 | ||
| Feruloyl glucose | 1.31 ± 0.18 | ||
| 3-Feruloylquinic acid | 1.24 ± 0.34 | ||
| Caffeoyl aspartic acid | 1.22 ± 0.28 | ||
| p-Coumaroyl tartaric acid | 1.21 ± 0.25 | ||
| Others | Alkylphenols | 5-Pentadecylresorcinol | 1.34 ± 0.14 |
| Tyrosol | Demethyloleuropein | 1.32 ± 0.22 | |
| Curcuminoids | Bisdemethoxycurcumin | 1.31 ± 0.17 | |
| Demethoxycurcumin | 1.24 ± 0.12 | ||
| Phenolic terpenes | Thymol | 1.30 ± 0.31 |