关键词: 芒萁, 多糖, 提取, 分离, 抗菌活性

Abstract: Dicranopteris dichotoma polysaccharide was extracted by four methods,among those that the extracting rate of synthesis method was the highest,reaching 5.2%. The crude polysaccharide was purified by DEAE-52 and the neutral polysaccharide was eluted by distilled water and the polyanion polysaccharide was gradually eluted by 0.8mol/L NaCl. Their contents were 78% and 22%, respectively. The antibiotic activities of Dicranopteris dichotoma were tested with the agar disc diffusion method. The result showed that the polysaccharide had various amount of antibiotic activities against bacteria and fungi.

Key words: Dicranopteris dichotoma, polysaccharide, extraction, isolation, antibiotic activities