title: An analytical pipeline to compare and characterise the anthocyanin antioxidant activities of purple sweet potato cultivars.
abstract: 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.
authors.affiliation: Chongqing Engineering Research Centre for Sweet Potato, College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, PR China.
authors.forename: Yijie
authors.initials: Y
authors.lastname: Hu
authors.affiliation: Chongqing Engineering Research Centre for Sweet Potato, College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, PR China.
authors.forename: Liqing
authors.initials: L
authors.lastname: Deng
authors.affiliation: Chongqing Engineering Research Centre for Sweet Potato, College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, PR China.
authors.forename: Jinwu
authors.initials: J
authors.lastname: Chen
authors.affiliation: Chongqing Engineering Research Centre for Sweet Potato, College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, PR China.
authors.forename: Siyu
authors.initials: S
authors.lastname: Zhou
authors.affiliation: Chongqing Engineering Research Centre for Sweet Potato, College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, PR China.
authors.forename: Shuang
authors.initials: S
authors.lastname: Liu
authors.affiliation: Chongqing Engineering Research Centre for Sweet Potato, School of Life Sciences, Southwest University, Chongqing 400715, PR China.
authors.forename: Yufan
authors.initials: Y
authors.lastname: Fu
authors.affiliation: Chongqing Engineering Research Centre for Sweet Potato, School of Life Sciences, Southwest University, Chongqing 400715, PR China.
authors.forename: Chunxian
authors.initials: C
authors.lastname: Yang
authors.affiliation: Chongqing Engineering Research Centre for Sweet Potato, School of Life Sciences, Southwest University, Chongqing 400715, PR China. Electronic address: zhliao@swu.edu.cn.
authors.forename: Zhihua
authors.initials: Z
authors.lastname: Liao
authors.affiliation: Chongqing Engineering Research Centre for Sweet Potato, College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, PR China. Electronic address: mminchen@swu.edu.cn.
authors.forename: Min
authors.initials: M
authors.lastname: Chen
mesh_terms: D000872:Anthocyanins / Q000737:chemistry*; D000975:Antioxidants / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D027723:Ipomoea batatas / Q000737:chemistry*; D010084:Oxidation-Reduction
chemical_list: D000872:Anthocyanins; D000975:Antioxidants
keywords: Anthocyanins; Antioxidant activity; HPLC–DAD–MS/MS; Ipomoea batatas L.; Purple sweet potato