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Plant-growth promotion has been linked to the  Pseudomonas  genus since the beginning of this research field. In this work, we mined the genome of an Argentinean isolate of the recently described species  P .  donghuensis . Strain SVBP6, isolated from bulk soil of an agricultural plot, showed a broad antifungal activity and several other plant-probiotic activities. As this species has been recently described, and it seems like some plant-growth promoting (PGP) traits do not belong to the classical pseudomonads toolbox, we decide to explore the SVBP6 genome via an bioinformatic approach. Genome inspection confirmed our previous  in vitro  results about genes involved in several probiotic activities. Other genetic traits possibly involved in survival of SVBP6 in highly competitive environments, such as rhizospheres, were found. Tn 5  mutagenesis revealed that the antifungal activity against the soil pathogen  Macrophomina phaseolina  was dependent on a functional  gacS  gene, from the regulatory cascade Gac-Rsm, but it was not due to volatile compounds. Altogether, our genomic analyses and  in vitro  tests allowed the phylogenetic assignment and provided the first insights into probiotic properties of the first  P .  donghuensis  isolate from the Americas.

Genomic insights into the broad antifungal activity, plant-probiotic properties, and their regulation, in Pseudomonas donghuensis strain SVBP6