紫苏和鸭跖草抗菌活性的研究

studying on antibacterial acticities of perilla frutescens (L.) britt. and commelina communis l

采用系统溶剂提取法分别提取紫苏、白苏和鸭跖草的茎和叶，得到24个提取物，然后用滤纸扩散法测定这些提取物对枯草芽胞杆菌等8种菌株的抗菌活性，发现紫苏、白苏的抗菌活性比鸭跖草强，紫苏茎的乙酸乙酯提取物和白苏茎石油醚提取物对所测试的菌株表现出较好的生物活性，紫苏茎的乙酸乙酯提取物抑菌圈直径范围在7．0～11．0mm，白苏茎石油醚提取物抑菌圈直径范围在8．3-14．3ram，是该植物的抗菌活性部位．其抗菌范围广。

24 extracts were obtained by extracting the stems and leaves of Perilla frutescens （L.） Britt. and Commelina communis L by organic solvents. The antibacterial activities of those extracts were tested against 8 bacterial strains by paper disco diffusion method. It was found that the antibacterial activities of P. frutescens （L.） Britt. were stronger than those of C. communis L. The EtOAc and P.E. of extract of stem of P. frutescens （L.） Britt. showed good activities against the tested bacterial strains. The diameter of inhibition one of the former extracts was among 7.0-11.0mm and that of the latter extracts was among 8.3-14.3mm. Those two extracts were major antibacterial acticitive parts of P. frutescens （L.） Britt. They exhibit broad spectrum on bacteria.