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Food Science and Technology

Print version ISSN 0101-2061On-line version ISSN 1678-457X

Abstract

HASSIMOTTO, Neuza Mariko Aymoto; MOTA, Renata Vieira da; CORDENUNSI, Beatriz Rosana  and  LAJOLO, Franco Maria. Physico-chemical characterization and bioactive compounds of blackberry fruits (Rubus sp.) grown in Brazil. Ciênc. Tecnol. Aliment. [online]. 2008, vol.28, n.3, pp.702-708. ISSN 0101-2061.  http://dx.doi.org/10.1590/S0101-20612008000300029.

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.

Keywords : Rubus; flavonoids; anthocyanin; antioxidant capacity.

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