Table 3

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

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


Values are the mean of three replicates ± standard error of the mean; ND = not detected; 2-KGA = 2-ketogluconic acid.

Vyas and Gulati BMC Microbiology 2009 9:174   doi:10.1186/1471-2180-9-174

Open Data