Oxidative Stress Induced by Polymyxin E Is Involved in Rapid Killing of Paenibacillus polymyxa

Figure 5

Changes in diameter of purplish red halo formed from supernatant (a and b) and cell pellet (c and d) of colistin-treated P. polymyxa with various FeCl₃. Before detection of purplish red halo formation, there is H₂O₂ treatment for (b) and (d), but not for (a) and (c).

(a)

(b)

(c)

(d)