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Identification and Characterization of Native Nitrogen-Fixing Rhizobacteria from Capsicum sp. in Caribbean Region of Colombia
Contextualization: The use of biological inoculants or biofertilizers based on plant growth-promoting bacteria constitutes a sustainable biotechnological alternative to improve agricultural production.
Knowledge gap: nevertheless, the environmental characteristics in agroecosystems could be a lot different between regions, this could produce an effect over the mentioned inoculants.
Purpose: in the present study were isolated and characterized native microorganisms with plant growth-promoting activity that could be used in crops from the Caribbean region of Colombia.
Methodology: For that reason, rhizospheric bacteria were isolated from Capsicum sp., they were molecularly identified with 16S, and their ability to fix nitrogen in Ashby medium and to solubilize phosphate in NBRIP medium was determined. Afterwards, identified inocula were applied to chilli plants, and their effect in the plant growth promotion was evaluated.
Results and conclusions: the isolates were identified as: Achromobacter sp., Bacillus mycoides, Bacillus sp., and Paenibacillus dendritiformis, and their application enhanced plant growth, this was evidenced by the increment of at least one growth parameter, and in the nitrogen concentration of chilli plant tissues as well. Finally, Achromobacter sp. and B. mycoides were the inocula that generated the best results, indicating its potential to be used in regional agriculture.