MYCORRHIZAL MORPHOLOGY AND ASSOCIATED FUNGI OF ALLIUM MONGOLICUM
蒙古韭共生真菌及其菌根形态学的研究

Arbuscular mycorrhizal fungi (AMF) associated with the root of Allium mongolicum distributed in the steppe and desert areas of central and western Inner Mongolia were investigated. All the root samples of Allium mongolicum were found to be infected by AMF, and their mycorrhizae belong to Arum-type based on their morphological features. There are differences in colonization rates between different sites, ranged from 8.76% to 36.12%. The colonization rate was not significantly correlated to the density of spores and the species richness of AMF. 25 AMF species of 4 genera were identified including 8 uncertain species in Acaulospora, Glomus and Entrophospora. Glomus and Acaulospora are the dominant genera. Glomus fasciculatum was dominant in Shapotou, while Acaulospora sp. 1, Glomus constrictum, G. convolutum and G. diaphanum became the dominant species in the other sample site. The occurrence of dominant species has similarity in the different sample sites, even though there is obvious differences in the spore density and the species richness.