白皮锦鸡儿黄酮醇类化合物及其抗菌和抗氧化活性

从豆科植物白皮锦鸡儿(Caragana leucophloea Pojark.)地上部分分离到3个黄酮醇类化合物,经理化和波谱分析鉴定为3-O-甲基山奈酚(1)、3-O-甲基槲皮素(2)和槲皮索(3)。活性测定表明,1表现出较强的抗细菌活性,对大肠杆菌和番茄疮痂病菌的半抑制浓度分别为9.00μg/mL和7.42μg/mL,最低抑制浓度均为12.5μg/mL;而2和3则表现出较强的抗氧化活性,对DPPH还原的半抑制浓度分别为14.39μg/mL和13.64μg/mL;对β-胡萝卜素-亚油酸氧化的半抑制浓度分别为10.26μg/mL和9.87μg/mL。上述黄酮醇类化合物均为首次从白皮锦鸡儿中分离...

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Published in天然产物研究与开发 Vol. 23; no. 5; pp. 853 - 856
Main Author 高海峰 郑兵兵 王蓟花 单体江 赵思峰 周立刚
Format Journal Article
LanguageChinese
Published 石河子大学农学院,石河子832003 2011
中国农业大学农学与生物技术学院,北京100193%中国农业大学农学与生物技术学院,北京,100193%石河子大学农学院,石河子,832003
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ISSN1001-6880
DOI10.3969/j.issn.1001-6880.2011.05.014

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Summary:从豆科植物白皮锦鸡儿(Caragana leucophloea Pojark.)地上部分分离到3个黄酮醇类化合物,经理化和波谱分析鉴定为3-O-甲基山奈酚(1)、3-O-甲基槲皮素(2)和槲皮索(3)。活性测定表明,1表现出较强的抗细菌活性,对大肠杆菌和番茄疮痂病菌的半抑制浓度分别为9.00μg/mL和7.42μg/mL,最低抑制浓度均为12.5μg/mL;而2和3则表现出较强的抗氧化活性,对DPPH还原的半抑制浓度分别为14.39μg/mL和13.64μg/mL;对β-胡萝卜素-亚油酸氧化的半抑制浓度分别为10.26μg/mL和9.87μg/mL。上述黄酮醇类化合物均为首次从白皮锦鸡儿中分离得到。
Bibliography:Leguminosae; Caragana Ieucophloea; flavonol derivatives; antimicrobial activity; antioxidant activity
Three flavonol derivatives have been isolated from the aerial parts of Caragana leucophloea Pojark. (Leguminosae). By means of pbysicochemical and spectrometric analysis, they were identified as 3-O-methylkaempferol (1), 3-O-methylquercetin (2), and quercetin (3). Among them, 1 exhibited the strongest antibacterial activity with its median inhibitory concentration (ICs0) values on Escherichia coli and Ralstonia solanacearum as 9.00 μg/mL and 7.42 μg/ mL, respectively, and minimum inhibitory concentration (MIC) values on these two bacteria equally as 12.5 μg/mL. Either 2 or 3 showed stronger antioxidant activity than 1. The IC50 values of 2 and 3 on DPPH reduction were 14.39μg/mL and 13.64 μg/mL,respectively,and those on β-carotene-linoleic acid oxidation were 10.26 μg/mL and 9.87 μg/mL, respectively. These flavonol derivatives were isolated from this plant species for the first time.
GAO Hai-feng, ZHENG Bing-bi
ISSN:1001-6880
DOI:10.3969/j.issn.1001-6880.2011.05.014