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Seed Oils of Five Black Tartary Buckwheat Cultivars with Biochemical Characterization and Antioxidant Properties

文献类型： 外文期刊

作者： Zhang, Zhen 1 ; He, Caian 1 ; Zhu, Ruixue 1 ; Shen, Jing 1 ; Yu, Yueli 1 ; Peng, Qiang 1 ; Gao, Jinfeng 2 ; Li, Yunlong 3 ;

作者机构： 1.Northwest A&F Univ, Coll Food Sci & Engn, Yangling 712100, Shaanxi, Peoples R China

2.Northwest A&F Univ, Coll Agron, Yangling 712100, Shaanxi, Peoples R China

3.Shanxi Acad Agr Sci, Inst Agr Prod Proc, 79 Longcheng St, Taiyuan, Peoples R China

关键词： Black tartary buckwheat oil;Fatty acid composition;Carotenoid components;Tocopherol profiles;Antioxidant activity

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 ）

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收录情况： SCI

摘要： Black tartary buckwheat oils (BTBOs) were extracted from five major industrial tartary buckwheat cultivars grown under similar agronomical activities and environmental conditions. These oils were characterized for the bioactive compounds containing fatty acids, beta-carotene, lutein, alpha-, beta-, delta- and gamma-tocopherol, and for their antioxidant properties. The total tocopherol contents that were obtained ranged from 704.66 to 1156.19 mg/kg, with gamma-tocopherol (588.98-977.91 mg/kg) as the main component. The concentration of lutein ranged from 253.14 to 429.63 mg/kg, which was almost ten times higher than that of beta-carotenoid (46.71-69.2 mg/kg), indicating that black tartary buckwheat seed oils were a good source of lutein. The predominant fatty acids were unsaturated oleic acid (C18:1) (35.27-40.61 %) and linoleic acid (C18:2) (38.25-42.90 %). Excellent values of 2,2-diphenyl-1-picrylhydrazyl radical (DPPH), diammonium salt (ABTS) radical scavenging activities were obtained and the highest oxygen radical absorbance capacity (ORAC) value of 13.89 mmol Trolox equiv/g oil was detected in the variety of Chuanqiao No. 1, which was clearly separated by principal component analysis (PCA) on the basis of the highest content of tocopherols and carotenoids. Moreover, the correlation analysis showed that tocopherols and carotenoids were the major contributors to the antioxidant activities of the BTBOs. This study demonstrates that lipophilic extraction in the tartary buckwheat seed contains many interesting bioactive compounds, which are beneficial for human health.

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[1]The effect of simulated digestion in vitro on bioactivity of wheat bread with Tartary buckwheat flavones addition. Gawlik-Dziki, Urszula,Baraniak, Barbara,Dziki, Dariusz,Lin, Rufa. 2009

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