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Table 3 Organic acid production by fluorescent Pseudomonas during Udaipur rock phosphate solubilization.

From: Organic acid production in vitro and plant growth promotion in maize under controlled environment by phosphate-solubilizing fluorescent Pseudomonas

    Organic acid (μg/ml)  
Strain P-liberated (μg/ml) Final pH Oxalic Gluconic 2-KGA Lactic Succinic Formic Citric Malic Total organic acids (μg/ml)
P. trivialis            
BIHB 728 8.7 ± 0.04 3.78 14.3 ± 1.5 6676.7 ± 6.0 ND 52.8 ± 1.3 ND ND ND ND 6743.8
BIHB 736 5.6 ± 0.10 3.79 10.6 ± 1.5 7116.0 ± 5.9 ND ND ND ND ND ND 7126.6
BIHB 745 8.3 ± 0.30 3.78 11.1 ± 0.9 8190.0 ± 5.8 ND ND ND 35.1 ± 3.1 ND 53.4 ± 3.7 8289.6
BIHB 747 4.4 ± 0.01 3.71 10.3 ± 1.1 6962.3 ± 5.0 ND 41.3 ± 2.0 ND ND ND ND 7013.9
BIHB 749 5.3 ± 0.01 3.60 11.4 ± 0.7 7921.7 ± 6.9 ND 41.3 ± 3.5 ND ND ND ND 7974.4
BIHB 750 6.1 ± 0.02 3.87 9.4 ± 0.8 7496.7 ± 6.0 ND ND ND ND ND 34.5 ± 2.5 7540.6
BIHB 757 7.1 ± 0.04 3.72 8.7 ± 1.2 5459.0 ± 3.1 ND ND ND ND ND ND 5467.7
BIHB 759 14.0 ± 0.90 3.62 9.5 ± 1.0 6850.0 ± 6.4 ND ND ND ND ND ND 6859.5
BIHB 763 9.3 ± 0.04 3.78 26.6 ± 0.7 10903.0 ± 3.6 ND 42.8 ± 1.0 ND 93.6 ± 2.0 ND 103.6 ± 3.3 11169.6
BIHB 769 7.6 ± 0.50 3.70 12.4 ± 1.5 2964.0 ± 3.1 20.5 ± 2.3 92.3 ± 1.8 56.1 ± 4.6 ND ND 383.0 ± 3.1 3528.3
P. poae            
BIHB 730 5.0 ± 0.09 3.70 25.7 ± 1.4 5055.3 ± 5.0 16.4 ± 1.2 ND ND ND ND ND 5097.4
BIHB 752 7.7 ± 0.10 3.90 8.0 ± 0.8 7119.0 ± 3.8 ND ND ND ND ND 35.5 ± 3.4 7162.5
BIHB 808 7.6 ± 0.05 3.83 9.5 ± 1.3 7616.3 ± 3.5 ND ND ND ND ND 36.3 ± 3.3 7662.1
P. fluorescens
BIHB 740 3.8 ± 0.05 4.00 12.7 ± 1.0 1117.7 ± 5.4 67.0 ± 2.6 164.0 ± 2.6 102.3 ± 1.5 ND ND ND 1463.7
Pseudomonas spp.            
BIHB 751 1.4 ± 0.03 4.20 13.9 ± 0.8 631.7 ± 4.4 255.0 ± 5.1 ND ND ND ND 4350.0 ± 2.5 5250.6
BIHB 756 9.4 ± 0.05 3.75 11.9 ± 0.8 5061.7 ± 9.4 51.7 ± 2.5 ND ND ND ND 57.7 ± 2.7 5183.0
BIHB 804 3.8 ± 0.40 4.03 12.5 ± 0.9 5839.3 ± 7.8 ND 43.2 ± 2.0 ND ND ND 41.8 ± 2.5 5936.8
BIHB 811 6.1 ± 0.05 4.11 17.1 ± 1.2 4412.3 ± 5.2 138.8 ± 0.9 121.3 ± 1.5 108.0 ± 3.1 ND ND 658.1 ± 2.3 5455.6
BIHB 813 5.2 ± 0.30 4.32 12.0 ± 1.5 5971.7 ± 5.2 ND ND ND ND ND ND 5983.7
Total organic acids (μg/ml) 235.6 97392.7 549.4 599 266.4 128.7 0 5753.9 104925.7
  1. Values are the mean of three replicates ± standard error of the mean; ND = not detected; 2-KGA = 2-ketogluconic acid.