Species Diversity Of Arbuscular Mycorrhizal Fungi In The Rhizosphere Of Ammopiptanthus Monglicus

Arbuscular mycorrhizal (AM) fungi are widely distributed in global terrestrialecosystems and play a bridge role in the cycle of nutrient material between plant andsoil. In the desert ecosystem, it is the ways that promote and expand the growth andreproduction of indigenous plants to prevent desertification process. Currently, theresearch on the symbiotic relationship between AM fungi and desert plants has causedwide spread concern, but studies on AM fungi symbiotic relationship with theAmmopiptanthus monglicus has not been reported.A.monglicus is one of the ancient Mediterranean relict plant, it has been listed asnational levels to protect plants. Because of its biological characteristics lead to amore narrow distribution ranges. It only distributed in parts of Inner Mongolia,Ningxia and Gansu, it is an excellent sand-fixing tree in arid and semi-arid desertregion.In order to illustrate the AM fungal community composition and distribution ofrhizosphere of A.monglicus, the test select Yinchuan, Minqin and Shapotou to collectthe soil samples. Spatial diversity of AM fungi and relationships between AM fungaldiversity and soil factors in the rhizosphere of A.monglicus and AM fungal geneticcharacteristics were analyzed, to provided great help to mycorrhizal biotechnologyapplication and restoration of desert vegetation. The main results as follows:1.36AM fungal species from five genera were isolated. In these species,16speciesbelonged to Glomus,13to Acaulospora, three to Scutellospora, three toFunneliformis and one to Diversispora. Glomus, Acaulospora, Scutellospora andFunneliformis are distributed among the three plots. Diversispora only distributedin Shapotou. G.melanosporum is the domimant species of Yinchuan and Shapotou,G.reticulatum is the domimant species of Minqin。2. The AM fungi in the rhizosphere of A.monglicus have a significant temporal andspatial distribution. The spore density of2013are higher than2012, and the sporedensity of Minqin were significantly higher than Yinchuan and Shapotou plots.3. AM fungal species diversity and distribution in the spatial are different. Species richness and Simpson index of AM fungi of Minqin were significantly higher thanthose in Yinchuan and Shapotou, Shannon-Weiner index of Minqin and Shapotouwere significantly higher than Yinchuan site.4. The results of correlation analysis, Yinchuan and Shapotou having a significantcorrelation in the species composition, Minqin with these two plots has nosignificant correlation in the species composition.5. AM fungi in the rhizosphere of A.monglicus had significant spatial distributiondynamics, and influenced by soil factors including soil organic carbon, available N,and available P.