FIG 4.

Rescue of growth and reversal of increased biofilm formation in the Δodc mutant by exogenous polyamines. Exogenous putrescine (A), spermidine (B), and norspermidine (C) were tested across the indicated concentration range for their impact on growth (blue) and biofilm formation (red) of the Δodc mutant (prepared as described in the legend to Fig. 2). Plotted are percentages of the wild type's growth and biofilm formation in the absence of exogenous polyamines. Error bars show the standard deviations from a minimum of three biological replicates.