FIG. 1.
INA [log10 (ice nuclei/cell)] expressed by Pseudomonas spp. containing pvd-inaZ in RSM medium amended with ferric citrate. P. putida N1R (pvd-inaZ) (●) and the pyoverdine-deficient mutant N1R Pvd− (pvd-inaZ) (■) (A), P. putida WCS358 Pvd− (pvd-inaZ) (▴) (B), and P. fluorescens B10 (pvd-inaZ) (⧫) (C) were grown for 24 h in RSM medium amended with 10−3 to 10−7 M ferric citrate. INA values are means of three replicate cultures. Error bars represent standard errors of the means; most error bars are obscured by graph symbols.