ISHS Acta Horticulturae 756: International Symposium on Medicinal and Nutraceutical Plants
ANTIOXIDANT AND ANTIMICROBIAL ACTIVITY OF EDIBLE PLANTS AND THEIR POTENTIAL USE AS NUTRACEUTICALS |
| Authors: | G. Schmourlo, Z.B. de Morais-Filho, D.B. de Oliveira , S.S. Costa, R.R. Mendonça-Filho, C.S. Alviano, A.L.P. Miranda |
| Keywords: | A. occidentale, M. glabra, X. sagittifolium, R. Officinalis, HPLC-DAD, flavonoids, antioxidant |
| Abstract:
Present work reports a comparative account of chemical composition, antioxidant and antimicrobial activity in the supernatants of Anacardium occidentale L. (cashew) fruits, Xanthosoma sagittifolium (L.) Schott. (cocoyam) cormel, Malpighia glabra L. (acerola) fruits, and Rosmarinus officinalis leaves obtained by ethanol precipitation of the aqueous extracts. Samples were evaluated as radical scavengers by DPPH radical scavenging method. HPLC-DAD chromatograms were performed to identify the flavonoids and broth dilution method to determine the antimicrobial activity of plant extracts. A. occidentale and M. glabra showed DPPH radical scavenging activity above 90% at 100 µg/ml. A. occidentale kept its activity at about 50% at 10 µg/ml. The content of flavonoids can influence the antioxidant activity as it was the case for A. occidentale and X. sagittifolium. In the cases of M. glabra the antioxidant activity maybe due to its content of vitamin C and anthocyanins not detected under our HPLC-DAD conditions. The flavonoid content of A. occidentale and X. sagittifolium influenced antimicrobial activity, but flavonoids in M. glabra and R. officinalis had no antimicrobial activity. | |
Download Adobe Acrobat Reader (free software to read PDF files) | |
