VA Mycorrhizal Fungi Infecting Plants in Saline-alkali Soil of Gansu

The symbiosis of plants with VA mycorrhizal fungi in saline-alkali soil of Gansu was studied and this showed that the VA mycorrhizal fungi colonized all 17 species of 10 families but Suaeda glauca Beg.and the colonization rate was 94.1%;there was high spore density of the mycorrhizal fungi in salinealkali soil,indicating that the plants relatively highly relied on the mycorrhizal fungi in saline-alkali soil ecosystem of Gansu and the mycorrhizal fungi had a strong capacity of producing spores in the saline-alkali soil;of the VA mycorrhizal fungi that was investigated to infect plants,Arum type accounted for 68.75% and Pris type accounted 31.25%;the types of the mycorrhizal fungi depended on the types of their host families,Poaceae and Iridaceae supporting P type and other families such as Liliaceae and Elaeagnaceae supporting A type;soil types exerted influence on the colonization rates and rhizospere spore densities of host plants and the colonization rate and rhizoshpere spore density of same host plants greatly differed among different soil types.