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Physico-chemical characterization and bioactive compounds of blackberry fruits (Rubus sp.) grown in Brazil

2008; Sociedade Brasileira de Ciência e Tecnologia de Alimentos; Volume: 28; Issue: 3 Linguagem: Inglês

10.1590/s0101-20612008000300029

1678-457X

Neuza Mariko Aymoto Hassimotto, Renata Vieira da Mota, Beatriz Rosana Cordenunsi, Franco Maria Lajolo,

Antioxidant Activity and Oxidative Stress

Five blackberry cultivars (Rubus sp.) were evaluated for antioxidant capacity, bioactive compounds and composition. Ascorbic acid levels, consisting of dehydro-ascorbic acid, ranged from 9.8 to 21.4 mg.100 g-1 fresh weight. Cyanidin (66 to 80% of total flavonoids), epicatechin, quercetin and traces of kaempferol were the main flavonoids found in all cultivars. The five cultivars presented high antioxidant capacity in the β-carotene/linoleic acid system, with inhibition similar to the synthetic antioxidant BHT, at a 50 µM concentration. Caingangue cultivar presented high vitamin C and total phenolics content, while Guarani had the highest cyanidin, total anthocyanin and total flavonoids levels and also the highest antioxidant capacity. These cultivars also presented good TSS/TA ratios. From the data, at a quantitative level, blackberry can be considered a good source of bioactive compounds, as well as potentially beneficial to human health.