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

Figure 1.

Figure 1

(A) Phosphate solubilization by selected PSB (phosphate solubilizing bacteria) in the presence of 0.5% hydroxyapatite in NBRIP broth. Drop in pH is indicated by the red line. (B) IAA (indole-3-acetic acid) production by selected PSB in the presence of 0.1% L-tryptophan. Uninoculated media were used as a negative control (C-). The values represent means of replicates (n = 3) ± standard deviations. The different letters in superscript (a, b, c…) indicate the statistically significant difference at 95% between treatments.