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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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