期刊
AGRICULTURE-BASEL
卷 10, 期 9, 页码 -出版社
MDPI
DOI: 10.3390/agriculture10090383
关键词
biofertilizers; Enterobactersp; phosphate solubilization; siderophores; extracellular polymeric substances
类别
资金
- TECNOLOGICO NACIONAL DE MEXICO [6422.18-P]
The excessive use of fertilizers in agriculture is mainly due to the recognized plant requirements for soluble phosphorus. This problem has limited the implementation of sustainable agriculture. A viable alternative is to use phosphate solubilizing soil microorganisms. This work aimed to isolate inorganic phosphorus-solubilizing bacteria from the soils of agroecosystems, to select and identify, based on sequencing and phylogenetic analysis of the 16S rRNA gene, the bacterium with the highest capacity for in vitro solubilization of inorganic phosphate. Additionally, we aimed to determine its primary phosphate solubilizing mechanisms and to evaluate its effect on Habanero pepper seedlings growth. A total of 21 bacterial strains were isolated by their activity on Pikovskaya agar. Of these, strain ITCB-09 exhibited the highest ability to solubilize inorganic phosphate (865.98 mu g/mL) through the production of organic acids. This strain produced extracellular polymeric substances and siderophores that have ecological implications for phosphate solubilization. 16S rRNA gene sequence analysis revealed that strain ITCB-09 belongs to the genusEnterobacter.Enterobactersp. ITCB-09, especially when immobilized in beads, had a positive effect onCapsicum chinenseJacq. seedling growth, indicating its potential as a biofertilizer.
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