| 南极地衣提取物抗氧化能力的初步研究 |
| A preliminary study on antioxidant ability of Antarctic lichen extract |
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| 中文关键词:抗氧化活性，地衣，南极 |
| 英文关键词:antioxidant activity, Lichen, Antarctica |
| 基金项目:国家高技术研究发展计划（“863”计划）（No. 2007AA021405） |
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| 中文摘要: |
| 本文讨论4种南极地衣簇花石萝Usnea aurantiacoatra，南极石萝Usnea antarctica，粉球衣Sphaerophorus globosus及一种石蕊Cladonia sp.甲醇提取物的体外抗氧化能力；采用亚油酸氧化体系、二苯代苦味酰自由基体系、还原力实验对其抗氧化活性进行测定，并同维生素C、丁基甲氧基苯酚进行比较。结果显示供试南极地衣均具有较高的抗氧化活性，且呈剂量依赖关系；其中，簇花石萝的脂质过氧化抑制率最高，还原力最大；石蕊的二苯代苦味酰自由基清除能力最大。此外，从簇花石萝中提取的松萝酸具有一定的抗氧化活性，但明显低于簇花石萝粗提物。 |
| 英文摘要: |
| This paper deals with antioxidant ability of methanol extract from 4 Antarctic lichens, i.e. Usnea aurantiacoatra, Usnea antarctica, Sphaerophorus globosus and Cladonia sp. The antioxidant ability was detected by the linoleic acid, 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical and reducing power systems, and compared with that of commercial antioxidant Vitamin C and butylated hydroxyanisole (BHA). The results showed that the lichens collected from Antarctica exhibited high antioxidant activities, and the antioxidant activity was concentration-dependent. Among 4 lichens, Usnea aurantiacoatra had the maximum inhibitory ratio of lipid peroxidantion and reducing power, Cladonia sp. showed the maximum scavenging activity on DPPH free radical. Besides, usnic acid from Usnea aurantiacoatra also exhibited antioxidant activity, however, its activity was lower than that of the crude extract from Usnea aurantiacoatra. |
| 韩乐琳 魏江春. 南极地衣提取物抗氧化能力的初步研究[J]. 菌物学报, 2009, 28(6): 846-849 |
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