Phenolic compositions and antioxidant attributes of leaves and stems from three inbred varieties of Lycium chinense Miller harvested at various times
Phenolic compositions and antioxidant attributes of leaves and stems from three inbred varieties of Lycium chinense Miller harvested at various times
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DOI：
10.1016/j.foodchem.2016.06.072
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发表时间：
2017-01-15
期刊：
影响因子：
8.8
通讯作者：
Yang, Deng-Jye
中科院分区：
文献类型：
--
作者：
Liu, Shih-Chuan;Lin, Jau-Tien;Yang, Deng-Jye
以1 ~ 4月采收的3个枸杞自交系品种（ML 01、ML 02和ML 02-TY）为试材，通过清除DPPH自由基、TEAC、还原力和抑制Cu ~（2+）诱导的人LDL氧化等方法，研究了枸杞叶片和茎的抗氧化成分和性质。用高效液相色谱法分析了它们的黄酮和酚酸成分。各品种的叶片和茎中总酚、总黄酮和缩合单宁含量均以高温月份的较高。在不同月份采集的样品中，这些成分的含量顺序为：四月（22.3摄氏度）>三月（18.0摄氏度）>一月（15.6摄氏度）>二月（15.4摄氏度）。所有测定的叶和茎的抗氧化活性也显示出类似的趋势。同一月份不同品种的样品酚类成分、含量及抗氧化活性也存在差异。它们的抗氧化活性与类黄酮和酚类物质含量呈显著正相关。(C)2016由Elsevier Ltd.出版
Antioxidant components and properties (assayed by scavenging DPPH radicals, TEAC, reducing power, and inhibiting Cu2+-induced human LDL oxidation) of leaves and stems from three inbred varieties of Lycium chinense Miller, namely ML01, ML02 and ML02-TY, harvested from January to April were studied. Their flavonoid and phenolic acid compositions were also analyzed by HPLC. For each variety, the leaves and stems collected in higher temperature month had higher contents of total phenol, total flavonoid and condensed tannin. Contents of these components in the samples collected in different months were in the order: April (22.3 degrees C) > March (18.0 degrees C) > January (15.6 degrees C) > February (15.4 degrees C). Antioxidant activities of the leaves and stems for all assays also showed similar trends. The samples from different varieties collected in the same month also possessed different phenolic compositions and contents and antioxidant activities. Their antioxidant activities were significantly correlated with flavonoid and phenolic contents. (C) 2016 Published by Elsevier Ltd.