on lethality of paraquat to Escherichia coli. Effects of pH, glucose, and chelating agents

FIG. 9. Effects of EDTAon the bacteriostatic and bactericidaleffects ofparaquat onE. coli B. E. coli B wasexposed to 2.5 mMparaquat in TSYmedium. At the indicated intervals samples weretaken for dilution and plating. The conditions applied before enu-merationwereasfollows (curves): 1, TSY-agarafter 16hofaerobicincubation; 2, as in curve 1, but after 30 h ofadditional incubationunderanaerobic conditions; 3,