Table 2.
Biochemical characterization of rooibos plants selected for transcriptome analyses (October 2016 samples).
| Plant | Aspalathin | Orientin | Iso-Orientin | Iso-Vitexin | Vitexin | Hyperoside | Luteolin | Quercetin |
|---|---|---|---|---|---|---|---|---|
| A | 66.52 ± 0.68 a | 4.70 ±0.19 a | 6.94 ± 0.05 a | 2.18 ± 0.07 a | 1.98 ± 0.10 a | 2.06 ± 0.09 a | 0.01 ± 0.00 a | 0.01 ± 0.00 a |
| B | 9.24 ± 0.17 b | 1.56 ± 0.04 c | 1.50 ± 0.01 c | 0.17 ± 0.00 c | 0.49 ± 0.01 b | 0.41 ± 0.01 b | 0.21 ± 0.00 b | 0.01 ± 0.00 a |
| C | 0.00 ± 0.00 c | 1.82 ± 0.08 c | 1.71 ± 0.03 c | 0.17 ± 0.00 c | 0.23 ± 0.01 c | 0.32 ± 0.01 b,c | 0.59 ± 0.01 c | 0.01 ± 0.00 a |
| D | 0.00 ± 0.00 c | 2.29 ± 0.06 b | 2.85 ± 0.08 b | 0.69 ± 0.01 b | 0.25 ± 0.00 c | 0.17 ± 0.00 c | 0.58 ± 0.01 c | 0.05 ± 0.00 b |
* Concentrations of major flavonoids are provided in mg/100 g dry weight ± STD (n = 3). Biochemical analyses were conducted using HPLC-DAD. Different letters indicate significant differences as verified using the Tukey test.