Phosphate-solubilizing bacteria could transform insoluble phosphorus into soluble phosphorus which can be ab-sorbed by plants and improve the utilization of phosphorus in soil. A strain of efficient phosphate-solubilizing bacterium (TCCC150015)was isolated from summer maize rhizosphere soil samples. Based on the morphology,physiological and biochemical properties and phylogenetic analysis of 16S rDNA sequence,strain TCCC150015,was identified as Pantoea dispersa. The effects of carbon sources,nitrogen sources,NaCl content and pH value on the phosphate-solubilizing ability of Pantoea dispersa TCCC150015,was investigated. The results showed that TCCC150015,would achieved the highest soluble phosphorus content of 254.10,mg/L when glucose was supplied as the only carbon source,which was 24.42 times that of the control group. The soluble phosphate content was 258.25 mg/L and 248.48 mg/L respectively when +4NH -N and 3NO--N were used as nitrogen sources individually,which was 3.56 times and 3.43 times the soluble phosphate when provided with +4NH -N and 3NO--N together as nitrogen sources. It revealed that the initial pH and initial concentration of NaCl in the medium has a siginificant effect(P<0.05)on the capacity of phosphate-solubilization.
国家科技期刊平台
NSTL
万方数据
维普
