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Table 2 Solubilization of tricalcium phosphate by the tested rhizobacterial strains

From: Screening and optimization of indole-3-acetic acid production and phosphate solubilization by rhizobacterial strains isolated from Acacia cyanophylla root nodules and their effects on its plant growth

Isolates

PVK medium

NBRIP medium

Solubilization efficiency (SE%)

Final pH

P2O5 liberated (μg ml-1)

Solubilization efficiency (SE%)

Final pH

P2O5 liberated (μg ml-1)

Agrobacterium sp.

66 ± 1.41

5.95 ± 0.04

298 ± 9.89

66 ± 2.82

5.69 ± 0.02

488 ± 11.13

Phyllobacterium sp.

96 ± 2.82

5.8 ± 0.03

410 ± 8.48

91 ± 2.12

5.2 ± 0.04

576 ± 8.48

Bacillus sp.

200 ± 4.94

5.28 ± 0.07

519 ± 9.19

190 ± 3.53

4.65 ± 0.07

782 ± 9.19

Rhizobium sp.

183 ± 4.94

5.4 ± 0.02

480 ± 12.72

183 ± 2.12

4.85 ± 0.04

684 ± 5.65

  1. Correlation coefficient between final pH and P2O5 liberated (r = − 0.95 in PVK; r = − 0.98 in NBRIP); between solubilization efficiency and P2O5 liberated (r = 0.95) in both media