东祁连山高寒草地优势植物根部入侵真菌的初步鉴定

Preliminary identification on root invaded fungi of dominant plants of alpine grassland in eastern Qilian Mountains

选取东祁连山具有代表性的4类高寒草地样地珠芽蓼草地、禾草草地、沼泽草地和蒿草草地的优势牧草作为试验材料。采用组织培养分离方法,在9种优势植物根部分离得到28株真菌,经纯化、鉴定,19株分属于7个属,尚有9株待定。在已鉴定属中,镰孢菌为优势种,共8株,占28.57%;曲霉次之,共4株,占14.29%;青霉2株,占0.07%,其他属相对较少。草地早熟禾(Poa pratensis)根部入侵真菌较多,麻花艽(Gentiana straminea)和紫花针茅(Stipa purpurca)最少。

Four different representative grassland types in eastern Qilian Mountains were selected to be experimental samples.They were Polygonum meadow,Grass steppe,Swamp meadow and Kobresia meadow.28 fungus were isolated from the roots of the nine plant using tissue culture method.The Fusarium fungus,Aspergillus,Penicillium have been identified and accounted for 28.57%,14.29% and 0.07% respectively,the Fusarium fungus were dominate strains and nine strains still need to research further.Poa pratensis L.has more root-invading fungi than Gentiana straminea Maxim and Stipa purpurca Griseb.