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. 2004 Aug;186(16):5543–5546. doi: 10.1128/JB.186.16.5543-5546.2004

FIG. 4.

FIG. 4.

Aerotolerance of DL1 (wild type) (triangles), DLCN46(rpoS::Cm) (circles), and DLCN52(rpoS::Cm/rpoS+) (diamonds) after 0, 1, 2, and 4 days of air exposure. Data are means of triplicates. Survival was estimated as the lag time of growth of a culture derived from oxygen-exposed cells as described previously (21); determination of CFU was not feasible due to the fact that G. sulfurreducens forms cellular aggregates when exposed to oxygen, a trait that was enhanced by the rpoS mutation. OD 600, optical density at 600 nm.