Antimicrobial and beneficial properties of bacterial species isolated from phyllospheric microbiota

The use of Biocontrol Agents (BCAs) has gained attention from the scientific community during the last decades, driven by the need to seek sustainable and eco-friendly alternatives to confront plant pathogens in agriculture which cause significant loss in production.The phyllosphere is the habitat provided by the aboveground or aerial part of the plants (leaves, flowers, fruits), this is a very dynamic habitat with communities that can endure large changes in humidity, nutrition, radiation, etc. Research on phyllosphere has historically lagged behind, compared to the rhizosphere.Some bacteria in the plant’s microbiome play an important role in the functioning of plants by influencing their health and development protecting them against diseases by producing different secondary metabolites. In the present thesis, we focused on Bacillus velezensis SPL51, Bacillus subtilis STRP31 and Paenibacillus sp. PL91 bacteria isolated from tomato and lettuce phyllosphere with beneficial agricultural properties such as high antimicrobial activity against plant pathogen, plant growth promotion effect, and the ability to produce spores with strong resistance to adverse conditions, which provides convenience for formulation commercial uses