Journal
FOOD CHEMISTRY
Volume 194, Issue -, Pages 46-54Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2015.07.133
Keywords
Purple sweet potato; Ipomoea batatas L; Anthocyanins; Antioxidant activity; HPLC-DAD-MS/MS
Funding
- National High Technology Research and Development Program of China [2011AA100607]
- Fundamental Research Funds for the Central Universities [XDJK2014A008, 2362015XK08]
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Purple sweet potato (Ipomoea batatas L) is rich in anthocyanin pigments, which are valuable constituents of the human diet. Techniques to identify and quantify anthocyanins and their antioxidant potential are desirable for cultivar selection and breeding. In this study, we performed a quantitative and qualitative chemical analysis of 30 purple sweet potato (PSP) cultivars, using various assays to measure reducing power radical-scavenging activities, and linoleic acid autoxidation inhibition activity. Grey relational analysis (GRA) was applied to establish relationships between the antioxidant activities and the chemical fingerprints, in order to identify key bioactive compounds. The results indicated that four peonidin-based anthocyanins and three cyanidin-based anthocyanins make significant contributions to antioxidant activity. We conclude that the analytical pipeline described here represents an effective method to evaluate the antioxidant potential of, and the contributing compounds present in, PSP cultivars. This approach may be used to guide future breeding strategies. (C) 2015 Published by Elsevier Ltd.
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