荸荠皮提取物对细菌的作用方式研究

以B.subtilis;E.coli,S.aureus为指示菌,用生长曲线法、琼脂块再培养法对荸荠皮提取物抗细菌作用的方式进行探测,结果表明:低浓度(0.1%～0.2%)的荸荠皮提取物可抑制细菌的生长,较高浓度(0.4%)的荸荠皮提取物则具有一定的杀菌作用。用相差显微镜进行观察,可见加有荸荠皮提取物的培养液中细菌的菌体密度明显下降,菌体形态有明显的改变。

Study on Antibacterial Action of the EETP

The B.sutilis, E.coli and S.aureus were used as indicator-bacteria to study the mode of action of the extract of Eleocharis tuberosa peel (EETP) to prevent the growth of bacteria by mears of growth curve method and recultivating agarblock. The results showed: low concentration (0.1%～0.2%) of EETP could prevent the growth of bacteria while a higher concentration (0.4%) could kill the bacteria to certain degree. The observation under the microscope, phase showed that in the culture solution of bacteria with EETP, the bacteria density lowered obviously and their shapes also showed obvious changes.