Fig. 1From: Effect of plant growth-promoting rhizobacterial treatment on growth and physiological characteristics of Triticum aestivum L. under salt stressPhotographs of selected bacterial strains exhibiting various plant growth-promoting (PGP) properties. Tests for protease, cellulase, siderophore production, and phosphate solubility were performed. For relative comparison of each property, refer to the Additional file 1: Table S1Back to article page