首页|Antioxidant and polyphenol oxidase activity of some Tunisian pearl millet (Pennisetum glaucum (L.) R.Br.) ecotypes. (Special Issue: Tunisian fruit and vegetables.)
Antioxidant and polyphenol oxidase activity of some Tunisian pearl millet (Pennisetum glaucum (L.) R.Br.) ecotypes. (Special Issue: Tunisian fruit and vegetables.)
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NSTL
Pearl millet is a rich source of various phytochemicals, including phenolic acids. Natural compounds in food are an important health-protecting factor. In Tunisia, many autochthonous pearl millet ecotypes have generated interest because their nutritional qualities. In order to provide information on the composition of pearl millet grown under local conditions, seven ecotypes were analyzed to evaluate their nutraceutical and antioxidant properties. The nutraceutical properties were determined by evaluating the total phenolic while the antioxidant properties were studied using the DPPH free radical scavenging activity. The results showed that the total phenolic varied widely between ecotypes (from 198 to 323 mg GAE/100 g). The DPPH radical scavenging activity of all the ecotypes was relatively high. The antioxidant activity of pearl millet flour significantly varied among ecotypes and ranged from 62.5 to 86.4%. Fractionation of phenolic extracts by HPLC showed 3 major peaks and several minor peaks: Trans-cinnamic (486 to 677 micro g/g of extract), protocatechic (127 to 452.4 micro g/g of extract) and hydroxybenzoic (253.5 to 437.6 micro g/g of extract) were the most important. Identifying ecotypes growing under local agricultural conditions with significant levels of beneficial factors could not only provide health benefit to consumers but also promote the value-added cultivation and stimulate industrial and economic growth.
NSTL
