Figure 4
(a) Ethanol (filled circles) and acetate (open circles) concentrations in cocultures of yeast and lactic acid bacteria. Samples were taken from cocultures of Saccharomyces cerevisiae and Lactobacillus buchneri (upper panel) or S. cerevisiae and Lactobacillus fermentum (lower panel) inoculated in a lignocellulosic medium from chips of spruce hydrolyzed with dilute acid. The composition of the medium is described in [14]. Values represent duplicate cultures performed in falcon tubes and error bars indicate minimum/maximum values. (b) Ethanol (filled circles) and acetate (open circles) concentrations in cocultures of yeast and acetic acid bacteria. Samples were taken from cocultures of S. cerevisiae and Acetobacter syzygii (upper panel), S. cerevisiae and Acetobacter tropicalis (middle panel) or pure culture of S. cerevisiae (lower panel) inoculated in a lignocellulosic medium from chips of spruce hydrolyzed with dilute acid. The composition of the medium is described in [14]. Values represent duplicate cultures performed in falcon tubes and error bars indicate minimum/maximum values.