TPC in the leaves of 116 sweet potato (Ipomoea batatas L.) varieties and Pushu 53 leaf extracts

文献类型: 外文期刊

第一作者: Xu, Wenqing

作者: Xu, Wenqing;Liu, Lixiang;Hu, Bing;Sun, Yi;Ye, Hong;Zeng, Xiaoxiong;Ma, Daifu

作者机构:

关键词: Sweet potato leaf;Polyphenol content;Antioxidant activity;DPPH;ABTS;FRAP;HPLC;Biodiversity;Underutilized green leafy vegetable;Food analysis;Food composition

期刊名称:JOURNAL OF FOOD COMPOSITION AND ANALYSIS ( 影响因子:4.556; 五年影响因子:4.89 )

ISSN: 0889-1575

年卷期: 2010 年 23 卷 6 期

页码:

收录情况: SCI

摘要: The total polyphenol contents (TPC) of leaf extracts from 116 varieties of sweet potato cultivated in China were determined by Folin-Ciocalteu method. In addition, the crude extract (CE) of Pushu 53 leaves, with relatively higher TPC and its fractions of chloroform, ethyl acetate, n-butanol and water, were prepared and subjected to the determination of TPC, evaluation of antioxidant activities in vitro by assays of DPPH. ABTS and FRAP, and analysis of phenolic constituents by high performance liquid chromatography (HPLC) and HPLC-mass spectrometry. Our results show that the extracts demonstrated potential antioxidant activity, and that a satisfactory correlation between TPC and antioxidant activity was observed. In addition, the main bioactive compounds for the antioxidant activity of the extract were polyphenols, especially derivatives of caffeoylquinic acid (CQA), such as 5-CQA, 3,4-diCQA, 3,5-diCQA, and 4,5-diCQA. Their contents (8.95%) were 0.41, 3.41, 4.09, and 1.04%, respectively, accounting for 79.6% of TPC in CE (11.24%). (C) 2010 Elsevier Inc. All rights reserved.

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