3种昆虫黄酮提取物的大肠杆菌抑菌活性研究

Bacteriostasis of Three Insect Flavonoid Extracts against Escherichia coli

[目的]测定美洲大蠊、中华稻蝗、芫菁3种昆虫体内黄酮提取物的抑菌作用效果。[方法]采用溶剂萃取法(SFE)提取3种昆虫总黄酮,根据公式计算不同浓度的黄酮提取物对大肠杆菌的抑制率。[结果]其他条件相同时,美洲大蠊、中华稻蝗、芫菁3种昆虫的黄酮浓度与抑制大肠杆菌繁殖的作用效果呈正相关;浓度相同时,美洲大蠊黄酮体内提取物抑菌效果最佳,中华稻蝗次之,芫菁的抑菌效果最弱。[结论]美洲大蠊、中华稻蝗、芫菁3种昆虫黄酮提取物对大肠杆菌有一定的抑制作用。

[Objective]The research aimed to determine the antibacterial effect of total flavonoids in Periplaneta americana,Oxya chinensis and Mylabris phalerate .[Methods] Total flavonoids were extracted by solvent extraction (SFE), and the inhibition rates of flavonoids extracts with different concentrations of three insects on Escherichia coli were calculated according to the formula.[Results] When other conditions were the same, the flavonoid concentrations of the three insects of Periplaneta americana,Oxya chinensis and Mylabris phalerate were positively correlated with the effect of inhibiting the reproduction of Escherichia coli. Under the same concentration, the flavonoids extracted from Periplaneta americana had the best bacteriostatic effect, followed by Oxya chinensis , and Mylabris phalerate had the weakest bacteriostatic effect.[Conclusion] Three insect flavonoid extracts of Periplaneta americana, Oxya chinensis and Mylabris phalerate have certain inhibitory effects on Escherichia coli.