FIG 2.
Growth of (A) and Mn oxide production by (B) strains AB_14, AB_18, and TB-2 in the presence of various concentrations of Cd, Cu, and Ni. Growth over time was monitored by OD600 measurements of isolates cultured in liquid medium (AB_14 and TB-2 at pH 5.5, AB_18 at pH 7). Mn oxides were measured using the LBB colorimetric assay after 742 h of growth. All values are means of triplicate cultures minus the concentrations of control cultures (uninoculated media) ± standard deviations. Omitted values indicate no growth under the experimental conditions.