3种百合鳞茎中多酚类物质的抗氧化活性分析

以野生百合渥丹、山丹和传统食用的兰州百合为研究对象,对其鳞茎中多酚类物质、11种单体酚的含量及抗氧化活性(ABTS自由基、超氧阴离子、羟自由基的清除能力,铜离子还原能力以及抑制脂质过氧化活性)进行了分析。结果表明:两种野生百合鳞茎中的多酚类物质含量及抗氧化活性均显著高于兰州百合。3种百合鳞茎中单体酚的种类也有所不同,但均含有没食子酸、矢车菊素-3-芸香糖苷、儿茶素、表儿茶素、杨梅酮、芦丁、对香豆酸、山奈酚。相关性分析显示,除对羟自由基的清除力外,各酚类物质总量与不同抗氧化指标之间呈显著正相关关系。试验结果认为,野生百合鳞茎可作为天然抗氧化资源应用于食品和医药业,具有一定的开发应用前景。

Antioxidant Activity of Polyphenolic Compounds in Bulbs of Three Lilium Species

In this study,the antioxidant activities of the polyphenolic compounds in the bulbs of three Lilium species(L.concolor,L.pumilum and L.davidii var.unicolor) were investigated with a view to their exploitation as a potential source of natural antioxidants.The polyphenolic contents,antioxidant activities(ABTS+scavenging activity,superoxide radical scavenging activity,hydroxyl radical scavenging activity,cupric-reducing reducing capacity and lipoperoxidation activity) and 11 monomeric phenolic contents were analyzed.The results showed that total polyphenolics content and antioxidant activities of two wild Lilium species were significantly higher than those of L.davidii var.unicolor.Although the composition of monomeric phenolics from the bulbs of three Lilium species were not identical,the gallic acid,cyanidin 3-rutinoside chloride,(+)-catechin,(-)-epicatechin,myricetin,rutin,p-coumaric acid and kaempferol were present in all these species.Furthermore,the polyphenolic compounds of bulbs from three Lilium species exhibited a significant positive correlation with ABTS radical cation scavenging activity,superoxide radical scavenging activity,cupric-reducing antioxidant capacity and lipoperoxidation activity,excepted with hydroxyl radical scavenging activity.These results strongly suggest that wild lily bulbs have more important potential in the development food or medicine resources for their better antioxidant properties.