FIG 3.

Growth of M. maripaludis strain JJ and mutants in standing culture with formate as the electron donor. (A) Quantification of surface-associated biomass from cultures grown in McCas-formate medium and stained with crystal violet. Cultures were grown without agitation for 24 h, the amount of time needed to reach stationary phase. Data are averages and standard deviations from four independent experiments. (B) Surface-attached biomass from microscope coverslips submerged in McCas-formate medium. Images were taken from the center of the coverslip. Bar = 50 μm. *, P < 0.05; **, P < 0.01; ***, P < 0.001.