Plant Growth Promotion Function of Bacillus sp. Strains Isolated from Salt-Pan Rhizosphere and Their Biocontrol Potential against Macrophomina phaseolina

In recent decades, intensive crop management has involved excessive use of pesticides or fertilizers, compromising environmental integrity and public health. Accordingly, there been worldwide pressure to find an eco-friendly safe strategy ensure agricultural productivity. Among alternative approaches, Plant Growth-Promoting (PGP) rhizobacteria are receiving increasing attention as suitable biocontrol agents against pests. the present study, 22 spore-forming bacteria were selected among a salt-pan collection for their PGP traits antagonistic activity plant pathogen fungus Macrophomina phaseolina. Based on higher antifungal activity, strain RHFS10, identified Bacillus vallismortis, was further examined cell-free supernatant assays, column purification, tandem mass spectrometry employed purify preliminarily identify metabolites. Interestingly, minimum inhibitory concentration assessed fractions active M. phaseolina 10 times lower more stable than one estimated commercial fungicide pentachloronitrobenzene. These results suggest B. vallismortis RHFS10 potential growth-promoting chemical efficiently control phytopathogenic