Table 4.
Content of free and bound flavonoid aglycones in R. rugosa leaves (LF) and true fruits (FRU). Mean values of three replicate assays with standard deviation. Abbreviations: Free—fraction of free aglycones (non-hydrolyzed sample); AcH—fraction of bound aglycones (sample after acid hydrolysis); BQL—compound detected, but its concentration is below the quantification limit.
| LF-Free | LF-AcH | FRU-Free | FRU-AcH | |
|---|---|---|---|---|
| µg/g Dry Plant Material | µg/g Dry Plant Material | |||
| Taxifolin | - | - | <BQL | - |
| Eriodictyol | 0.07 a ± 0.00 | - | 0.03 a ± 0.00 | <BQL |
| Quercetin | 6.3 9a,* ± 0.15 | 1.94 b,* ± 0.02 | 0.13 b,* ± 0.00 | 0.11 b,* ± 0.01 |
| 3-O-Methylquercetin | 0.04 ± 0.00 | - | - | - |
| Apigenin | 1.27 ± 0.01 | - | - | - |
| Naringenin | 0.31 ± 0.00 | - | < BQL | - |
| Kaempferol | 2.09 a ± 0.03 | 0.51 a,b ± 0.01 | < BQL | 0.03 b ± 0.00 |
| Isorhamnetin | - | 0.03 a ± 0 | < BQL | 0.05 a ± 0.00 |
| 3-O-Methylkaempferol | 1.81 ± 0.01 | - | - | - |
Values are presented in mean ± standard deviation (n = 3) and evaluated by one-way ANOVA test (post test: Duncan test). Different superscript letters (a,b) in the same rows denotes significant differences at p < 0.05 (“*”—p < 0.001).