Fig. 1
Growth curves of four P. thermoglucosidasius strains. The strains were cultivated in mLB medium in stoppered serum bottles with an initial gas atmosphere consisting of 50% CO and 50% air. DSM 2542T (green) and DSM 2543 (black) reached their maximum absorbance after ~ 6 h while there was still O2 present. DSM 6285 (blue) reached its maximum absorbance OD600 = 0.537 ± 0.02 after ~ 36 h during the anaerobic phase. The non hydrogenogenic strain DSM 21625 (orange) reached its maximum (OD600 = 0.645 ± 0.032) after 9.39 h and decreased to a final value of OD600 = 0.292 ± 0.021 at the end of the cultivation