Primary Metabolites and Polyphenols in Rapeseed (Brassica napus L.) Cultivars in China

文献类型： 外文期刊

第一作者： Zhang, Miao

作者： Zhang, Miao;Zheng, Chang;Yang, Mei;Zhou, Qi;Li, Wenlin;Liu, Changsheng;Huang, Fenghong;Zheng, Chang;Zhou, Qi;Li, Wenlin;Liu, Changsheng;Huang, Fenghong;Zheng, Chang;Zhou, Qi;Li, Wenlin;Liu, Changsheng;Huang, Fenghong

作者机构：

关键词： Phenolic compounds; Antioxidant capacity; Correlations; Microwave; Rapeseed

期刊名称：JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY （ 影响因子：1.849； 五年影响因子：2.299 ）

ISSN： 0003-021X

年卷期： 2019 年 96 卷 3 期

页码：

收录情况： SCI

摘要： Defatted meals of 10 rapeseed (Brassica napus L.) varieties were investigated for their total phenolic, phenolic acid (free, esterified, and insoluble-bound forms), and tannin contents. The antioxidant capacities (AC) of methanol extracts from samples were assessed using the 2,2 '-diphenyl-1-picrylhydrazyl radical (DPPH center dot), Folin-Ciocalteu method and ferric reducing antioxidant power (FRAP), and beta-carotene-linoleic acid tests. In the fraction of free phenolic acids, sinapic, caffeic, ferulic, syringic, gallic, and p-coumaric acids were identified. In the fraction of esterified phenolic acids, sinapine, sinapoyl glucoside, and disinapoyl gentiobiose were identified. After basic hydrolysis, sinapic, ferulic, cinnamic, and 4-hydroxybenzoic acids were identified, and sinapic acid (SA) constituted 98.3% to 99.6% of the total esterified phenolic acids. Eleven components (sinapic, protocatechuic, p-coumaric, syringic, vanillic, gallic, caffeic, ferulic, salicylic, cinnamic, and 4-hydroxybenzoic acids) in the fraction of insoluble-bound phenolic acids were identified. The AC of the samples correlated with the total phenolic content. Overall, the total phenolics showed a better correlation with AC than the individual phenolic compounds. Moreover, SA, sinapoyl glucoside, and disinapoyl gentiobiose showed a highly significant and strong positive correlation with the AC of rapeseed meals, and the derivatives of cinnamic acid showed a higher correlation with AC than the derivatives of benzoic acid. The change in the canolol content in rapeseeds under microwave irradiation is discussed. The correlation of the canolol formed with SA and its derivatives is discussed.

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