Bioactivity and total phenolic content of 34 sour cherry cultivars

Thirty four sour cherry cultivars were investigated for their total phenolic content, total anthocyanin content, total antioxidant capacity and cancer cell proliferation inhibition activity. Birgitte × Böttermö and Fanal, which contained the highest total phenolics (754 ± 13.4 and 596 ± 5.7 mg gallic acid equivalent/100 g, respectively), displayed the strongest total antioxidant capacity (63 ± 7.5 and 52 ± 6.9 μmol trolox equivalent/g, respectively) and cancer cell proliferation inhibition activity (63 ± 1.7 and 70 ± 1.6%, respectively). Surefire and Favorit were the cultivars with lowest total phenolic content (111 ± 2.2 and 74 ± 2.5 mg gallic acid equivalent/100 g, respectively) and total anthocyanin content (40 ± 1.1 and 21 ± 0.5 malvin equivalent/g, respectively), total antioxidant capacity (12 ± 2.3 and 9 ± 3.1 μmol trolox equivalent/g, respectively) and cancer cell inhibition activity (7 ± 3.5 and 2 ± 0.2%, respectively). Multivariate data analysis on proton nuclear magnetic resonance (1H-NMR) data showed discrimination of the cultivars according to their bioactivity. The present study suggests that combination of 1H-NMR and multivariate statistical analysis can be used to predict and discriminate total phenolic content, total anthocyanin content, total antioxidant capacity and cancer cell proliferation inhibition activity of sour cherry cultivars.