Table 1.
Phenolic acid and anthocyanidin content in skin and flesh of tubers of the four selected potato cultivars.
| Compound | Cultivar | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Moradita | Waicha | Santa María | Summerside | |||||||||||||||||
| Skin | Flesh | R | Skin | Flesh | R | Skin | Flesh | R | Skin | Flesh | R | |||||||||
| 5-CGA | 970.85 ± 51.00 | (69.3) | 63.15 ± 6.65 | (94.2) | 15.4 | 184.10 ± 23.16 | (26.3) | 55.70 ± 11.90 | (18.3) | 3.3 | 1145.25 ± 46.60 | (72.8) | 877.30 ± 47.15 | (87.0) | 1.3 | 304.55 ± 49.95 | (78.9) | 26.30 ± 3.35 | (55.2) | 11.6 |
| 4-CGA | 212.25 ± 9.65 | (15.1) | ND | — | — | 261.45 ± 1.55 | (37.3) | 153.75 ± 2.40 | (50.6) | 1.7 | 248.30 ± 65.35 | (15.8) | 101.05 ± 15.60 | (10.0) | 2.5 | 42.55 ± 8.00 | (11.0) | 13.10 ± 0.70 | (27.5) | 3.2 |
| 3-CGA | 97.25 ± 0.45 | (6.9) | ND | — | — | 201.55 ± 1.55 | (28.8) | 91.65 ± 1.65 | (30.1) | 2.2 | 134.70 ± 36.35 | (8.6) | 23.50 ± 8.10 | (2.3) | 5.7 | 22.10 ± 6.75 | (5.7) | 6.85 ± 0.20 | (14.4) | 3.2 |
| CA | 91.35 ± 6.70 | (6.5) | 0.85 ± 0.15 | (1.3) | 107.5 | 39.05 ± 13.10 | (5.6) | 3.10 ± 1.70 | (1.0) | 12.6 | 32.55 ± 4.65 | (2.1) | 4.45 ± 2.70 | (0.4) | 7.3 | 15.95 ± 1.70 | (4.1) | 0.50 ± 0.30 | (1.0) | 31.9 |
| FA | 30.30 ± 6.80 | (2.2) | 3.00 ± 0.40 | (4.5) | 10.1 | 14.20 ± 3.80 | (2.0) | ND | — | — | 11.50 ± 3.95 | (0.7) | 2.55 ± 0.40 | (0.3) | 4.5 | 1.25 ± 0.35 | (0.3) | 0.90 ± 0.25 | (1.9) | 1.4 |
| Total | 1402.05 ± 74.70 | (74.4) | 67.00 ± 7.35 | (100) | 21.3 | 700.35 ± 43.15 | (67.2) | 304.20 ± 17.65 | (100) | 2.3 | 1572.30 ± 156.90 | (63.0) | 1008.85 ± 73.95 | (61.3) | 1.6 | 386.40 ± 66.75 | (100) | 47.65 ± 4.80 | (100) | 8.1 |
| phenolic acids | ||||||||||||||||||||
|
| ||||||||||||||||||||
| Cyanidin | 1.50 ± 0.65 | (0.3) | ND | — | — | 5.85 ± 1.65 | (1.7) | ND | — | — | 1.25 ± 0.40 | (0.1) | 5.10 ± 2.40 | (0.8) | 0.2 | ND | — | ND | — | — |
| Petunidin | 440.65 ± 10.30 | (91.2) | ND | — | — | ND | — | ND | — | — | ND | — | ND | — | — | ND | — | ND | — | — |
| Pelargonidin | ND | — | ND | — | — | 267.55 ± 1.15 | (78.1) | ND | — | — | 781.95 ± 49.15 | (84.7) | 494.20 ± 50.65 | (77.5) | 1.6 | ND | — | ND | — | — |
| Peonidin | 21.10 ± 2.60 | (4.4) | ND | — | — | 51.30 ± 2.50 | (15.0) | ND | — | — | 127.00 ± 13.35 | (13.7) | 126.40 ± 47.00 | (19.8) | 1.0 | ND | — | ND | — | — |
| Malvidin | 20.10 ± 7.80 | (4.1) | ND | — | — | 17.90 ± 2.25 | (5.2) | ND | — | — | 13.80 ± 8.25 | (1.5) | 12.30 ± 2.05 | (1.9) | 1.1 | ND | — | ND | — | — |
| Total | 483.35 ± 21.25 | (25.6) | 0 | — | — | 342.55 ± 3.60 | (32.8) | 0 | — | — | 923.95 ± 71.10 | (37.0) | 638.05 ± 102.15 | (38.7) | 1.4 | 0 | — | 0 | — | — |
| anthocyanidins | ||||||||||||||||||||
Note. Metabolite levels were determined by HPLC-DAD and expressed as µg/g DW ± SD from at least three independent extractions. Numbers in parentheses indicate the % of each compound(s) with respect to the corresponding total. R: skin-to-flesh ratio; ND: not detected.