Characterization of Antarctic bacteria phosphorus-solubilizing and plant growth promotion

Vera-Morales M.; López-Medina E.; Avilés-Centeno Á.; Ratti M.F. · Revista Peruana de Biologia (2024) · DOI: 10.15381/rpb.v31i4.28402

Resumen

Antarctica with one of the most hostile environments on the planet, harbors remarkable microbial biodiversity with significant potential as biotechnological resources, including those capable of phosphorus solubilization & plant growth promotion. This study aimed to molecularly characterize bacteria isolated from soils & photosynthetic organisms collected in Antarctica during the summer of 2023, & to evaluate their ability to produce siderophores & solubilize tricalcium phosphate under laboratory conditions. Additionally, their effects on the germination of Phaseolus vulgaris (common bean) seeds were assessed. The isolated bacteria were identified as belonging to the genera Pseudomonas, Sporosarcina, Sphingomonas, Arthrobacter, & Moraxella. Of the bacteria studied, 73% demonstrated siderophore production capability, with Arthrobacter showing the best results in tricalcium phosphate solubilization on Pikovskaya agar medium. Moreover, these bacteria promoted root development in P. vulgaris. The findings highlight the promising potential of these strains as cold-tolerant biofertilizers for sustainable agriculture in high-altitude regions.

Instituciones: Universidad Nacional de Trujillo