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Resumen del producto

Mendoza-Arroyo, G.E., M.J., Chan-Bacab, R.N., Águila-Ramírez, B.O., Ortega-Morales, R.E., Canché-Solís, A., Chab-Ruiz, K., Cob-Rivera, B., Dzib-Castillo, R., Tun-Che & J.C., Camacho-Chab (2020). Inorganic phosphate solubilization by a novel isolated bacterial strain Enterobacter sp. ITCB-09 and its application potential as biofertilizer. Agriculture-Basel. 10(9): 383. DOI: 10.3390/agriculture10090383.

Inorganic phosphate solubilization by a novel isolated bacterial strain Enterobacter sp. ITCB-09 and its application potential as biofertilizer

Gustavo Enrique Mendoza-Arroyo, Manuel Jesús Chan-Bacab, Ruth Noemí Águila-Ramírez, Benjamin Otto Ortega-Morales, René Efraín Canché-Solís, Antonio Chab-Ruiz, Katia Cob-Rivera, Benito Dzib-Castillo, Rodrigo Tun-Che y Juan Carlos Camacho-Chab

The excessive use of fertilizers in agriculture is mainly due to the recognized plantrequirements for soluble phosphorus. This problem has limited the implementation of sustainableagriculture. A viable alternative is to use phosphate solubilizing soil microorganisms. This workaimed to isolate inorganic phosphorus-solubilizing bacteria from the soils of agroecosystems, to selectand identify, based on sequencing and phylogenetic analysis of the 16S rRNA gene, the bacteriumwith the highest capacity for in vitro solubilization of inorganic phosphate. Additionally, we aimedto determine its primary phosphate solubilizing mechanisms and to evaluate its e ect on Habaneropepper seedlings growth. A total of 21 bacterial strains were isolated by their activity on Pikovskayaagar. Of these, strain ITCB-09 exhibited the highest ability to solubilize inorganic phosphate(865.98 g/mL) through the production of organic acids. This strain produced extracellular polymericsubstances and siderophores that have ecological implications for phosphate solubilization. 16S rRNAgene sequence analysis revealed that strain ITCB-09 belongs to the genus Enterobacter. Enterobacter sp.ITCB-09, especially when immobilized in beads, had a positive e ect on Capsicum chinense Jacq.seedling growth, indicating its potential as a biofertilizer.

Palabras clave: biofertilizers; Enterobacter sp.; phosphate solubilization; siderophores; extracellular; polymeric substances

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