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《Journal of Zhejiang Forestry College》 2006-03
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Anti-bacterial activity of extracts from Heptacodium miconioides

JIN Ze-xin,LI Jun-min(Ecology Institute,Taizhou University,Linhai 317000,Zhejiang,China)  
Heptacodium miconioides is a rare and endangered plant.Different organs of Heptacodium miconioides including flowers,leaves,and so on,were extracted with different solvents such as 70% ethanol,60% acetone and boiled water.The anti-bacterial activity of the extracts was detected on 4 experimental strains, such as Staphylococcus aureus,Bacillus thuringiensis,Pseudomonas aeruginosa and Escherichia coli.The results showed that in terms of the diameter of anti-bacterial zone of extracts from leaves and flowers with different solvents, the anti-bacterial activity of ethanol extract was the highest,while that of acetone extract took the second place and that of boiled water extract was the lowest.Anti-bacterial activity could be detected in the extracts of different organs of Heptacodium miconioides,and those from leaves and flowers were relatively higher while those from old stem and old root were relatively lower.The diameter of the anti-bacterial zone of ethanol extracts from leaves on 4 experimental strains was 7.67,9.67,10.00 and 100.00 mm,respectively,while that from flowers was 10.00,12.70,11.00 and 11.00 mm,respectively.Minimum inhibitory concentration(()MIC())of flowers and leaves on Bacillus thuringensis and Escherichia coli were all 50 g·L~(-1) and those on Staphylococcus aureus were all 100 g·L~(-1).Those on Pseudomonas aeruginosa were 50 and 100 g·L~(-1),respectively.The anti-bacterial activity of ethanol extracts from leaves and flowers ranked in turns:Bacillus thuringiensis,Escherichia coli,Pseudomonas aeruginosa,and Staphylococcus aureus.
【Fund】: 浙江省自然科学基金资助项目(399203);; 浙江省台州市科技局资助项目(044205)
【CateGory Index】: S482.292
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