Analysis of antioxidant capacity and anthocyanin composition among the cultivars of blueberry (Vaccinium spp.)
2013
Irizumi, J. (Kagoshima University, Kagoshima City (Japan). Faculty of Agriculture, Laboratory of Function Food and Nutrigenomics) | Sogo, T. | Sakao, K. | Yamamoto, M. | Fukudome, H. | Kawaguchi, S. | Tominaga, S. | Hou, D.X.
Blueberry (Vaccinium spp.) contains higher amounts of anthocyanins and is reported to be benefit to human health. On the other hand, there are differences on amounts and compositions of anthocyanins among the cultivars of blueberry, which concerns the functionality. In the present study, we first examined the extract-efficiency of the anthocyanins with the solvents available for food utilization, and then investigated anthocyanin compositions and antioxidant capacity (DPPH and ORAC) in 12 cultivars of blueberry cultivated in the Toso Orchard, Experimental Farm of the Faculty. The results revealed that the solvent consisting of 50% acetic acid - 50% ethanol showed the same extract efficiency as that with the solvent of 1% hydrochloric acid - 99% methanol, a classic solvent for anthocyanin extracts but not available for food utilization. There are no significant differences on the contents of polyphenols and anthocyanins,, and antioxidant capacity except Georgiagem blueberry showed the lower activity. Moreover, positive correlations of middle to high degree were observed between the polyphenol content and the antioxidant capacity.
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