Table 2 Organic acid secretion by Pseudomonas frederiksbergensis JW-SD2 during phosphate solubilization. Values are given as mean ± SD of three replicates

Gluconic acid

2155.25 ± 50.05

2102.54 ± 15.87

259.73 ± 48.89

2-Ketogluconic acid

171.14 ± 52.17

363.37 ± 93.55

1.67 ± 2.02

Pyruvic acid

329.29 ± 18.29

10.51 ± 7.44

5.15 ± 4.07

Maleic acid

224.81 ± 25.79

158.19 ± 637

1.36 ± 2.36

Malic acid

219.99 ± 82.73

1377.85 ± 235.21

39.65 ± 51.67

Lactic acid

103.75 ± 15.97

8.69 ± 10.32

ND ^a

Malonic acid

79.96 ± 16.47

9.03 ± 15.65

11.43 ± 19.80

Acetic acid

ND

16.70 ± 28.92

4638.55 ± 574.67

Methanoic acid

ND

ND

86.76 ± 15.11

Tartaric acid

ND

ND

18.53 ± 9.14

Oxalic acid

ND

ND

11.47 ± 10.13

Crylic acid

ND

ND

ND

Citric acid

ND

ND

ND

Total organic acids

3284.19

4046.88

5074.31