Fig. 7.

Effects of selected metabolites on the stimulation of V. cholerae growth in vitro. Bacterial growth was conducted as described in Fig. 6. To examine growth-stimulating capabilities of metabolites, M9 media lacking in glucose was used in experiments. Lines in gray show bacterial growth in M9 with no carbon source, while black lines indicate bacterial growth in M9 supplemented with indicated metabolites. Compounds shown in purple font promoted bacterial growth, albeit to varying degrees. The degree of growth-promoting capability of a given metabolite is displayed semi-qualitatively with “+++”, “++”, or “+” in Table 1. “+++” indicates the metabolite with the strongest growth-promoting capability, while the “+” means that the metabolite induced a mild growth promotion