Planta Piloto de Procesos Industriales Microbiológicos, CONICET, Tucumán, Argentina.
Arch Microbiol. 2011 Jul;193(7):489-96. doi: 10.1007/s00203-011-0692-y. Epub 2011 Mar 26.
The ability of soil microorganisms to solubilize phosphate is an important trait of plant growth-promoting bacteria leading to increased yields and smaller use of fertilizers. This study presents the isolation and characterization of phosphobacteria from Puna, northwestern Argentina and the ability to produce phosphate solubilization, alkaline phosphatase, siderophores, and indole acetic acid. The P-solubilizing activity was coincidental with a decrease in pH values of the tricalcium phosphate medium for all strains after 72 h of incubation. All the isolates showed the capacity to produce siderophores and indoles. Identification by 16S rDNA sequencing and phylogenetic analysis revealed that these strains belong to the genera Pantoea, Serratia, Enterobacter, and Pseudomonas. These isolates appear attractive for exploring their plant growth-promoting activity and potential field application.
土壤微生物溶解磷酸盐的能力是促进植物生长细菌的一个重要特征，可提高产量并减少肥料的使用。本研究从阿根廷西北部的普纳地区分离和鉴定了具有溶磷能力、碱性磷酸酶、铁载体和吲哚乙酸产生能力的磷细菌，并研究了它们的特性。所有菌株在三磷酸钙培养基中孵育 72 小时后，溶磷活性伴随着 pH 值的降低。所有分离株都具有产生铁载体和吲哚的能力。16S rDNA 测序和系统发育分析鉴定这些菌株属于泛菌属、沙雷氏菌属、肠杆菌属和假单胞菌属。这些分离株在探索其促进植物生长的活性和潜在的田间应用方面具有吸引力。
