Mycorrhizal Microstructure of Cymbidium georingii and Its Mycorrhizal Fungi Isolation and Identification

The distribution patterns of mycorrhizal fungi and the microstructure of mycorrhizae in pot cultured and wild Cymbidium georingii were investigated and observed.Six strains of mycorrhizal fungi were isolated and obtained from the mycorrhizae in pot cultured C.georingii and fifteen from the wild ones,which their frequency was 16.7%-50% and 6.7%-73.3%,respectively.According to this data of frequency,the strain CGP-3 would be dominant one of pot cultured and CGW-3 would be predominance in wild C.georingii.On the basis of morphological observation all of 21 strains isolated were identified into six taxa,two of them were similar morphological appearances as Aspergillus japonicus-like and Trichoderma sp.-like.By the way,the specificity between the endomycorrhizal fungi and arethusa was also discussed briefly.