人参皂苷compound K转化菌株的筛选

目的:筛选具有人参皂苷转化能力的真菌菌株,用于生产稀有人参皂苷compound K.方法:通过液态发酵,以三七茎叶总皂苷为底物,采用TLC和HPLC-ELSD检测转化产物,从12株植物病原真菌中筛选能够转化产生人参皂苷compoundK的最佳菌株.结果:获得一株高效人参皂苷转化真菌,可以转化产生人参皂苷compound K,该菌株为镰刀属真菌串珠镰孢Fusarium moniliforme.结论:串珠镰孢对三七茎叶总皂苷具有较高的转化效率,有望用于生产制备compound K等低含量高活性的稀有人参皂苷.

Screening of plant pathogenic fungi by ginsenoside compound K production

Objective : To screen a new strain which can transform panaxadiol saponins into the rare ginsenoside compound K. Method : The total saponins in stems and leaves of Panax notoginseng was used as a substrate in the liquid state fermentation process, and the results were detected by TLC and HPLC-ELSD to screen a strain from twelve plant pathogenic fungi which can produce ginsenoside compound K. Result : Fusarium moniliforme was found to transform the total saponins to ginsenoside compound K efficiently in the all twelve fungal strains. In the fermentation process, ginsenoside Rb₁ was transformed almost completely, and the content of ginsenoside Rd was decreasing evidently. Conclusion : F. moniliforme is selected as a new high-yield strain. It is expected to be used to produce the high activity infrequent ginsenoside compound K and to improve the content of active principles in medicinal plants.