Phylogenetic and physiological diversity of actinomycetes isolated from plant rhizosphere soils in the Qilian Mountains Diversity Analysis of Rhizosphere Microflora of Wild R. glutinosa Grown in Monocropping for Different Years Distribution of soil nutrient and microbial biomass in rhizosphere versus non-rhizosphere area of different plant species in desertified steppe Seasonal changes in microbial diversity in different cells of a wetland system constructed for municipal sewage treatment Microbial community diversity in the rhizosphere of wetland plants examined by phospholipid fatty acid and polymerase chain reaction denaturing gradient gel electrophoresis