Effect of Plant Growth Promoting Bacillus spp. on Germination and Seedling Growth of Soybean

Background: Bacillus spp., known to promote growth and reduce disease of various field vegetable crops, are frequently found in soils. The objective the study was select effective spp. isolates with multiple plant properties antifungal activities examine their effect on germination soybean. Methods: Bacterial were screened for production indole-3-acetic acid (IAA) siderophores solubilization phosphate. ability bacterial inhibit seven phytopathogenic fungi affecting soybean determined using a dual plate assay. further selected examined seed test. Result: All positive IAA production, while siderophore P-solubilization observed 80% 20% isolates, respectively. exhibited highest activity against Diaporthe caulivora, followed by sojae, eres, longicolla Macrophomina phaseolina least antagonistic toward Fusarium graminearum subglutinans. Selected B. subtilis significantly affected final germination, shoot length, root dry weight two cultivars. most could be used as potential inoculants improving productivity.