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. 2020 Jun 24;8(6):948. doi: 10.3390/microorganisms8060948

Figure 3.

Figure 3

Illustration of tests performed on plates for the assessment of PGP (plant growth promoting) traits of selected PSB. (A) Phosphate solubilization, (B) cellulase production, (C) protease production, (D) siderophores production.