FIG. 6.
Thermotolerance of glucose-starved wild-type, dnaK, rpoS, and rpoH suppressor strains. Cultures were examined following 24 h of starvation for resistance to killing by exposure to 51°C for the times indicated. The strains were as follows: PBL500 (wild type; open circles), PBL501 (ΔdnaK52; open triangles), PBL503 (ΔmutS-rpoS458; open squares), PBL603 (ΔdnaK52 rpoS13::Tn10; closed triangles), PBL622 (ΔdnaK52 rpoH-1; open diamonds), PBL623 (ΔdnaK52 rpoH-2; open hexagons), PBL624 (ΔdnaK52 rpoH-3; open inverted triangles), PBL713 (dnaK+ transductant of PBL622; closed circles), and PBL711 (PBL622/pPtac::dnaK+J+; closed inverted triangles).