Comparative Analysis of Caffeoylquinic Acids and Lignans in Roots and Seeds among Various Burdock (Arctium lappa) Genotypes with High Antioxidant Activity
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- 作者：Jingyi Liu ; Yi-Zhong Cai ; Ricky Ngok Shun Wong ; Calvin Kai-Fai Lee ; Sydney Chi Wai Tang ; Stephen Cho Wing Sze ; Yao Tong ; Yanbo Zhang
- 刊名：Journal of Agricultural and Food Chemistry
- 出版年：2012
- 出版时间：April 25, 2012
- 年：2012
- 卷：60
- 期：16
- 页码：4067-4075
- 全文大小：349K
- 年卷期：v.60,no.16(April 25, 2012)
- ISSN：1520-5118
文摘
Caffeoylquinic acids and lignans in the crude extracts of both roots and seeds from different burdock (Arctium lappa L.) genotypes were simultaneously characterized and systematically compared by LC鈥揗S and matrix-assisted laser desorption/ionization quadrupole ion trap time-of-flight mass spectrometry (MALDI-QIT-TOF MS), and their antioxidant activities were also investigated. A total of 14 lignans were identified in burdock seeds and 12 caffeoylquinic acids in burdock roots. High levels of caffeoylquinic acids were also detected in burdock seeds, but only trace amounts of lignans were found in burdock roots. Burdock seeds contained higher concentrations of lignans and caffeoylquinic acids than burdock roots. Quantitative analysis of caffeoylquinic acids and lignans in roots and seeds of various burdock genotypes was reported for the first time. Great variations in contents of both individual and total phenolic compounds as well as antioxidant activities were found among different genotypes. Burdock as a root vegetable or medicinal plants possessed considerably stronger antioxidant activity than common vegetables and fruits.