Comparative Analysis of Caffeoylquinic Acids and Lignans in Roots and Seeds among Various Burdock (Arctium lappa) Genotypes with High Antioxidant Activity
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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DOI：
10.1021/jf2050697
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发表时间：
2012-04-25
影响因子：
6.1
通讯作者：
Zhang, Yanbo
中科院分区：
文献类型：
--
作者：
Liu, Jingyi;Cai, Yi-Zhong;Zhang, Yanbo
不同牛至根和种子粗提物中的咖啡酰奎宁酸和木脂素用LC-MS和基质辅助激光解吸电离四极杆离子陷阱飞行时间质谱仪(MALDI-QJT-TOF MS)同时鉴定和系统比较了它们的基因分型，并研究了它们的抗氧化活性。共鉴定出14种木脂素类化合物和12种咖啡酰奎宁酸。牛至种子中也检测到高含量的咖啡酰奎宁酸，但在牛至根中只发现了微量的木脂素。牛至种子中木脂素和咖啡因奎宁酸的浓度高于牛至根。首次报道了不同类型牛至的根和种子中咖啡酰奎宁酸和木脂素的定量分析。不同品种间的单酚和总酚含量以及抗氧化活性均存在较大差异。牛至作为一种根茎类蔬菜或药用植物，具有比一般蔬菜和水果更强的抗氧化活性。
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-MS and matrix-assisted laser desorption/ionization quadrupole ion trap time-of-flight mass spectrometry (MALDI-QJT-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.