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林源生物活性物质的研究和利用是森林资源利用的重要方面。为研究重要的药源植物鹅掌楸属植物树皮及树叶提取物的抑菌活性,用琼脂稀释法检测鹅掌楸属不同种间和种内树皮及叶片提取物对大肠杆菌、绿脓杆菌、金黄色葡萄球菌和粪链球菌的抑菌反应。结果表明:鹅掌楸属3个树种的树皮和树叶提取物对大肠杆菌、绿脓杆菌、金黄色葡萄球菌和粪链球菌有明显的抑菌效果;树皮提取物对大肠杆菌、绿脓杆菌、金黄色葡萄球菌及粪链球菌的最低抑菌质量浓度(MIC)分别为5.12、0.64、0.64和0.64 mg/mL;树叶提取物的MIC分别为40.96、2.56、2.56和2.56 mg/mL。鹅掌楸属树种不同部位的提取物抑菌效果有明显差别,树皮提取物抑菌效果强于树叶提取物,但不同种间提取物的抑菌效果差异不显著。
The research and utilization of forest bioactive substances is an important aspect of the utilization of forest resources. In order to study the antibacterial activity of the barks and leaves extracts of the important drug source plant Liriodendron, the barks and leaves extracts of different species and species of Liriodendron were detected by agar dilution method against Escherichia coli, Bacteriostasis of Bacillus, Staphylococcus aureus and Streptococcus faecalis. The results showed that the barks and leaves extracts of three tree species of Liriodendron have obvious antibacterial activity against Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus and Streptococcus faecalis; The MICs of bacilli, Staphylococcus aureus and Streptococcus faecalis were 5.12, 0.64, 0.64 and 0.64 mg / mL, respectively. The MICs of leaf extracts were 40.96, 2.56, 2.56 and 2.56 mg / mL, respectively. The antibacterial effect of extract from different parts of Liriodendron tree was obviously different. The antibacterial effect of bark extract was stronger than that of leaf extract, but the antibacterial effect of different kinds of extracts was not significant.