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AMB Express

Table 2 Comparison of the approximate quantities of each surfactin group and the total surfactin production profile by B. amyloliquefaciens ST34 grown in mineral salt medium supplemented with different substrates as sole carbon sources

From: Variants of lipopeptides and glycolipids produced by Bacillus amyloliquefaciens and Pseudomonas aeruginosa cultured in different carbon substrates

Carbon substrate

Surfactin groups (mg L−1)

Total surfactin mg L−1 culture

Srf1

Srf2

Srf3

Srf4

Diesel

0.8 ± 0.2

1.4 ± 0.3

1.5 ± 0.4

2.3 ± 0.7

6.0 ± 1.6

Kerosene

0.3 ± 0.1

0.9 ± 0.5

1.0 ± 0.6

1.8 ± 1.2

4.1 ± 2.3

Sunflower oil

0.3 ± 0.04

0.7 ± 0.3

0.9 ± 0.5

1.4 ± 1.0

3.3 ± 1.9

Fructose

1.1 ± 0.7

4.4 ± 3.0

11.2 ± 8.6

11 ± 3.9

28 ± 16

Glucose

0.4 ± 0.1

0.7 ± 0.3

1.5 ± 0.9

1.2 ± 0.6

3.7 ± 1.9

Glycerol

0.4 ± 0.1

1.1 ± 0.3

1.2 ± 0.4

1.6 ± 0.4

4.3 ± 1.2

Sucrose

0.5 ± 0.1

1.3 ± 0.1

3.4 ± 0.9

2.3 ± 1.0

7.6 ± 2.0

Surfactin standard

215.09

400.82

318.45

58.74

1000a

  1. Each value represents the average of three culture extracts with standard error of the mean (SEM)
  2. aTotal concentration of standard surfactin include concentration of the other surfactin variants observed at 6.9 mg L−1
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