Table 5.
Total phenolic and flavonoid contents of the methanol extracts in different parts of two varieties of Z. officinale.
| Varieties | Plant Parts |
TF (mg Quercetin/g dry weight) |
TP (mg Gallic acid/g dry weight) |
||
|---|---|---|---|---|---|
| CO2 Concentration (μmol mol−1) | CO2 Concentration (μmol mol−1) | ||||
| 400 | 800 | 400 | 800 | ||
| Halia Bentong | Leaves | 5.44 ±0.45de | 6.04 ±0.79d | 31.22 ±2.41d | 39.68 ±5.61c |
| Stems | 1.61 ±0.22g | 1.96 ±0.17g | 6.14 ±0.8f | 7.6 ± 0.66ef | |
| Rhizomes | 4.03 ±0.081f | 7.35 ±1.99c | 11.33 ±0.27e | 28.76 ±7.74d | |
| Halia Bara | Leaves | 8.66 ±0.42bc | 9.23 ±0.36ab | 43.22 ±2.15b | 60.69 ±2.6a |
| Stems | 1.74 ±0.37g | 2.04 ±0.31g | 7.1 ±1.04ef | 7.89 ± 1.17ef | |
| Rhizomes | 4.48 ±0.08ef | 9.78 ±0.77a | 13.5 ±0.26e | 38.16 ± 1.55c | |
TF and TP are total flavonoids and total phenolics contents; All analyses are the mean ± standard deviation. Means not sharing a common letter were significantly different between species and treatments at P ≤ 0.05.