Table 2.
HPLC quantification of aqueous-methanol soluble phenolic components (mg/100 g DW) identified in different parts of P. pinnata.
| Compounds | Bark | Leaves | Seeds |
|---|---|---|---|
| Protocatechuic acid | 2.43 ± 0.14 a | 0.91 ± 0.06 b | 0.46 ± 0.16 c |
| Sinapic acid | 0.26 ± 0.01 | ND | ND |
| Sorbic acid | 0.34 ± 0.03 b | 1.21 ± 0.02 a | 0.02 ± 0.00 c |
| Ellagic acid | 1.50 ± 0.13 a | 0.10 ± 0.11 ab | 0.40 ± 0.16 b |
| Ferulic acid | 2.17 ± 0.16 a | 2.12 ± 0.13 a | ND |
| Syringic acid | 0.74 ± 0.05 a | 0.50 ± 0.06 b | 0.18 ± 0.02 c |
| Vanillic acid | 0.56 ± 0.06 a | ND | 0.52 ± 0.06 a |
| Gallic acid | 6.70 ± 0.31 a | 4.71 ± 0.24 b | 0.65 ± 0.06 c |
| Chlorogenic acid | 0.78 ± 0.04 a | 0.70 ± 0.05 a | 0.15 ± 0.16 b |
| Gentisic acid | 1.60 ± 0.04 a | 0.50 ± 0.16 b | ND |
| Salicylic acid | 0.14 ± 0.02 b | 1.18 ± 0.01 a | ND |
| Caffeic acid | 0.31 ± 0.06 a | 0.27 ± 0.02 a | 0.08 ± 0.01 b |
| p-Coumaric acid | 0.26 ± 0.02 b | 1.19 ± 0.05 a | 0.04 ± 0.16 c |
| m-Coumaric acid | 0.53 ± 0.08 | ND | ND |
| Tannic acid | 1.02 ± 0.06 a | 0.13 ± 0.03 c | 0.57 ± 0.03 b |
| 4-Hydroxybenzoic acid | 2.15 ± 0.11 a | 0.29 ± 0.01 b | 0.11 ± 0.16 c |
| 4-Hydroxycinnamic acid | 1.87 ± 0.06 a | 0.36 ± 0.02 b | ND |
Values are mean ± SD of three separate experiments. Different superscript letters within the same row indicate significant (p < 0.05) differences of means within the plant parts.