【摘要】 对陕西省３５种杨树外生菌根的调查研究，鉴定出９种外生菌根真菌。研究证明，一种外生菌根真菌可侵染不同种杨树；一种杨树又可被不同的菌根真菌侵染，并观察到在同一小根上顶端形成菌套，中部和下部形成泡囊丛枝这一混合型菌根形态。更多还原

【Abstract】 After investigating the ectomycorrhiza of 35 species poplars in Shoaanxi Province,9 species of ectomycorrhizal fung were identified. Experimental results proved that a species of ectomycorrhizal fungus can infect differentspecies of poplars,and that a species of poplar can be infected by different species of fungi.It was also dicovered that in the same small root mantle was formed on the top,and vesicular-arbuscular was formed on the middle and lower parts.This is a special form of mix-mycorrhiza.更多还原