Fig. 5

The sensitivity of panels of ORFRC isolates to ions at mean concentrations in the most contaminated wells. a The fraction of isolates that are resistant to mixtures of ions. Each ion is at its mean concentration in the most contaminated wells. Isolates are split into three categories: Pseudomonas, other isolates from uncontaminated wells, and Rhodanobacter isolates from contaminated wells. “7 selective ions” includes UO₂²⁺, Mn²⁺, Al³⁺, Co²⁺, Cd²⁺, Zn²⁺, and Ni²⁺. “All other ions” are the 19 other ions we considered (Fig. 3c) aside from the seven selective ions, pH, Ca²⁺, NO₃⁻, Cr³⁺, or CrO₄²⁻. b Inhibition of isolates by a mixture of the seven selective ions at pH 7. Exact 16S rDNA V4 sequence matches with two dominant Pseudomonas sub-populations in a contaminated well, PTMW02, are colored orange (Type 1) and green (Type 2). % Control growth above 100% is plotted at 100%