Adaptation of bacteria of the genera Rhodococcus and Gordona to stress conditions

The physiological response of bacteria of the genera Rhodococcus and Gordona to extreme values of some environmental factors (salinity, pH, temperature, and Lt-chlorophenol concentration) was studied. The preadaptation of an inoculum to extreme pH values of 5.0 and 9.5, elevated temperature (38 degrees C), increased concentrations of NaCl (50-60 g/l) and 4-chlorophenol (0.2 g/l) considerably shortened the lag phase and/or increased the maximum growth rate. Cross-adaptation to increased osmolarity of the medium and extreme pH values was revealed.