Table 2.
Quantitative changes of seven phenolic compounds of red pine and black pine twigs produced in Uljin according to harvest season(unit: mg/100 g, dry weight)
| Harvest season (mon) | Phenolic compound | ||||||
|---|---|---|---|---|---|---|---|
|
| |||||||
| PMG | CC | LRR | TRR | DHM | DHQG | DHQ | |
| Red pine | |||||||
| Spring (May) | 379.33±5.55a | 3.14±0.29d | 15.63±0.31b | 30.72±0.55b | 87.82±1.90b | 38.47±0.35c | 68.07±0.25b |
| Autumn (October) | 231.08±2.55d | 9.72±0.41c | 36.45±0.98a | 39.80±0.99a | 109.41±1.97a | 96.93±0.94a | 143.89±1.88a |
| Black pine | |||||||
| Spring (May) | 308.83±3.22b | 21.88±0.78b | 6.20±0.76d | 12.05±0.26d | 4.46±0.15d | 25.98±0.29d | 15.47±0.30d |
| Autumn (October) | 257.21±2.32c | 46.13±1.98a | 9.63±0.32c | 23.35±0.21c | 16.27±0.42c | 76.13±1.20b | 22.21±0.25c |
Data are presented as mean±SD of triplicate determinations.
Values with different superscript letters (a-d) within a column indicate significant differences (P<0.05) by Duncan’s multiple range test.
PMG, pinosylvin 3-methoxy-5-O-β-D-glucoside; CC, (+)-catechin; LRR, lariciresinol 4’-O-α-L-rhamnoside; TRR, taxiresinol-4’-O-α-L-rhamnoside; DHM, dihydromyricetin; DHQG, dihydroquercetin 3-O-β-D-glucoside DHQ, dihydroquercetin.