Table 1.
Content of phenolics (μg/g DW ± SD) in fractions of lingonberry leaves.
| Peak No. | Identity | Fractions of Lingonberry Leaves | |||
|---|---|---|---|---|---|
| L1 | L2 | L3 | L4 | ||
| 1 | Arbutin | 127,473.1 ± 988.3 a | 286,718.3 ± 2266.0 a | ND | ND |
| 2 | Neochlorogenic acid | 373.9 ± 8.4 b | 989.4 ± 5.7 b | ND | ND |
| 4 | Procyanidin B1 | 1625.2 ± 20.9 c,d | ND | 8780.1 ± 415.2 a | 496.2 ± 27.9 a |
| 5 | Procyanidin B3 | 9323.5 ± 222.4 e | ND | 56,120.3 ± 1881.8 b | 2709.4 ± 96.2 b |
| 6 | Chlorogenic acid | 2625.3 ± 123.5 f | 3384.8 ± 55.3 c | ND | ND |
| 7 | (+)-Catechin | 29,125.0 ± 227.6 g | ND | 170,419.4 ± 4222.2 c | 2615.8 ± 5.3 b |
| 8 | Cryptochlorogenic acid | 2861.8 ± 69.4 f | 2636.2 ± 24.9 c | ND | ND |
| 9 | Procyanidin B2 | 4012.9 ± 120.5 h | ND | 23,370.0 ± 141.0 d | 6838.9 ± 69.8 c |
| 12 | (−)-Epicatechin | 5992.6 ± 47.0 i | ND | 32,353.2 ± 370.3 e | 5114.3 ± 89.3 d |
| 15 | Procyanidin C1 | 3614.0 ± 143.1 h | ND | ND | 9840.1 ± 159.3 e |
| 17 | 2-O-Caffeoylarbutin | 7724.5 ± 189.4 l | ND | 47,309.4 ± 1433.4 h | ND |
| 18 | Procyanidin A1 | 12,969.4 ± 217.8 j | ND | ND | 50,580.9 ± 278.0 f |
| 19 | Rutin | 2362.3 ± 50.2 d,f | ND | 14,479.7 ± 44.8 f | ND |
| 20 | p-Coumaric acid | 706.5 ± 19.5 b,k | 475.5 ± 13.1 b | 236.5 ± 3.6 g | ND |
| 21 | Hyperoside | 5439.3 ± 120.5 i | ND | 33,594.0 ± 497.9 e | ND |
| 22 | Isoquercitrin | 1612.8 ± 71.8 c | ND | 10,263.1 ± 432.7 a | ND |
| 23 | Procyanidin A2 | 2787.3 ± 77.6 f | ND | ND | 16,500.0 ± 467.2 g |
| 26 | Nicotiflorin | 289.3 ± 9.6 b | ND | 1596.6 ± 60.0 g | ND |
| 27 | Reynoutrin | 1329.1 ± 28.2 c,k | ND | 8421.4 ± 278.0 a | ND |
| 28 | Guaiaverin | 2353.7 ± 56.5 d,f | ND | 14,706.2 ± 404.2 f | ND |
| 29 | Avicularin | 5637.9 ± 42.3 i | ND | 34,465.1 ± 1142.6 e | ND |
| 30 | Astragalin | 230.4 ± 11.1 b | ND | 1302.4 ± 54.5 g | ND |
| 31 | Quercitrin | 3672.3 ± 134.0 h | ND | 23,107.4 ± 979.5 d | ND |
| 32 | 6”-O-Acetylisoquercitrin | 97.0 ± 1.4 b | ND | 668.7 ± 24.5 g | ND |
| 34 | Afzelin | 108.6 ± 6.2 b | ND | 983.9 ± 24.2 g | ND |
| 35 | Quercetin-HMG-rhamnoside | 5355.0 ± 37.1 i | ND | 32,053.4 ± 812.7 e | ND |
| 37 | Quercetin | 157.0 ± 5.0 b | ND | 1031.1 ± 21.1 g | 1054.2 ± 3.1 a |
| 39 | Kaempferol | NQ | ND | NQ | NQ |
| Total identified | 239,859.8 | 294,204.2 | 515,261.7 | 95,749.8 | |
Different letters represent statistically significant differences (p < 0.05) between phenolics within the same fraction; ND—not detected, NQ—not quantified (amount below LOQ).