Aislamiento e identificación de microorganismos con capacidad de producción de ácido indol-acético en cultivos de cebolla del estado de Zacatecas

Growth promoting bacteria have the ability to function as biofertilizers that provide the plant nutrients, as well as the production of phytohormones such as indole-acetic acid (IAA). The evaluated strains were isolated from onion crops soil of the city of Fresnillo, Zacatecas, Mexico. Six strains positive for the production of indole-acetic acid were obtained. All six strains were identified by DNA extraction and subsequent bidirectional sequencing of the 16S gene. The strain identified as Pseudomonas cedrina was the largest producer of indole-acetic acid with a value of 174 ± 0.06 μg / mL; the bacteria identifided have potential to be used in the formulation of biofertilizers.