Fig. 5.

The enhancement of isoprene production in different Bacillus species a The effect of salt (0.3 M NaCl) on Bacillus subtilis isoprene production with and without 0.1 mM IPTG induction in WT and pHT01-kIspS recombinant Bacillus subtilis. b The effect of salt (0.3 M NaCl) on Bacillus licheniformis isoprene production with and without 0.1 mM IPTG induction in WT and pHT01-kIspS recombinant Bacillus licheniformis strain. The average isoprene production concentrations (μg per l culture per OD₆₀₀) are obtained from three independent cultures starting with standard OD₆₀₀ nm 0.1. The error bars represent the standard deviation