Study On Arbuscular Mycorrhizal Fungi Phyletic Resource And Diversity Of Several Xerophil In The Inner Mongolia West

Arbuscular mycorrhizal (AM) fungi is extremely widespread in the nature,which can form a symbiosis structure with the most of plants. Consequently,it can enlarge the absorb extent of the plant roots , improve their absorb of water and mineral nutrition,increase the efficiency about the ability of resist drought and pathogen. Arbuscular mycorrhizal fungi of several local xerophils in the Inner Mongolia West were researched, in order to find out their phyletic resource and diversity. Furthermore,the study on the ecology of symbiosis relationship between AMF and host plant will supply the technology of mycorrhizal for forestation and recovered ecosystem in arid area.As well as establish the basic theoretics for protect and exploiture the diversity of Arbuscular mycorrhizal fungi in arid area.Main research results are as follow:1. 34 Arbuscular mycorrhiza fungi species of 6 genera were isolated and identified from the roots of 15 plants in 23 samples, among which 3 species are from Acaulospora, 1 specie is from Archaespora, 25 species are from Glomus, 1 specie is from Paraglomus, 1 specie is from Gigaspora, 3 species are from Scutellospora, including 31 identified species and 3 uncertain species .2. The diversity of AMF in every sample was rich. Glomus is dominant genera, Scutellospora was found in every sample,but the kind and amount were fewer. Acaulospora was found in three samles,Archaespora,Paraglomus and Gigaspora were found only one specie.3. A important detection in the research is that the highest species richness was not always followed by the largest of spore density. Frequency,relative abundance,Importance numeral and species diversity of Arbuscular mycorrhizal fungi are different in each sample. On one side it can be caused by different species with different adjustability to environment ; on the other side,different species with different ability of product.4. Different of growing environment,the same specie of host plant in different samples,the same season in different samples and so on,which with different Arbuscular mycorrhizal fungi species and spore density.