4Yang J H,Liu H X,Zhu G M,et al. Diversity analysis of antagonists from rice - associated bacteria and their application in biocontrol of rice diseases[ J]. Journal of Applied Microbiology,2008,104( 1 ) :91 -104.
7Cantwell B A, McConnell D J. Molecular cloning and expression of a Bacillus subtilis β-glucanase gene in Escherichia coli [ J ]. Gene, 1983,23:211 -219.
8Ames N P,Christie B R,Jordand C. Use of the Chrome Azurol S Agar plate technique to differentiate strains and field isolates of Rhizobium legumirnsarum biovar trifolii[J]. Applied and Environmental Microbiology, 1989,5:707 -710.
9Soares R A,Roesch L W,Zanatta G,et al. Occurrence and distribution of nitrogen fixing bacterial community associated with oat(Arena sativa) assessed by molecular and microbiological techniques [ J ]. Applied Soil Ecology,2006,33:221 - 23d.
