Screening And Identification Of Southern Xinjiang Jujube Rhizosphere Microbial Function

Red Jujube cultivation has a long history in Xinjiang province, which is one of the important industryof characteristic fruit.It plays an important economic value and ecological function in Xinjiang. However,the production of red jujube was not increased year by year, due to the barren soil, extensive cultivation,excess fertilization, and low utilization rate in water and fertilizer, and as so on, and as well as]in qualityand economic efficiency. So carry on some studys on Plant Growth-Promoting Rhizobacteria for Xinjiangred dates:1.Methods of selective medium plates selection combined with reselection through determination ofgrowth-promoting traits were adopted, and a total of55root-promoting microbial strains, with26silicate-dissolving (i.e. Potassium-dissolving),20phosphorus-solubilizing, and9antagonistic bacterialstrains, were selected as the objects for further studies.2.The selected55microbial strains were field colonized and observed to study changes in theirabilities to promote plant growth,14,15, and7of the strains were respectively observed with strongpotassium-dissolving, phosphorus-solubilizing and antagonistic effects.3.Through16S rDNA sequence analysis, the strains selected after field colonization were identified.Results showed that the14potassium-dissolving strains belonged to4different genera--Arthrobacter,Bacillus, Pseudomonas, and Serratia; the15phosphorus-solubilizing strains belonged to4different genera--Acinetobacte, Bacillus, Agrobacterium, and Pseudomonas, with Pseudomonas as the dominant genus; the7antagonistic strains, as shown by splicing comparison and identification, belonged to Bacillus andPseudomonas.