[The effect of physical and chemical environmental factors on the growth of Pseudomonas aeruginosa dissociants].
The growth rates of the R-, S-, and M-dissociants of a hydrocarbon oxidizing strain of Pseudomonas aeruginosa were comparatively studied under variable environmental conditions (aeration, temperature, pH, UV radiation, and concentration of NaCl). The R-dissociant was found to be more tolerant to UV radiation, high aeration, and temperature. The S-dissociant, which is the most effective in degrading hydrocarbons, gains a selection advantage under acidic conditions. The M-dissociant has advantages over the other dissociants under conditions of decreased aeration, low temperature, and high concentration of NaCl. The results of this work are important for optimizing microbial growth conditions and for identification of bacteria. Probably, the biological sense of dissociation is to broaden the boundaries within which a species can survive under changeable environmental conditions.
Mil'ko
E S
ES
Moscow State University, Russia.
Nikitenko
L A
LA
D003470:Culture Media; D006094:Gram-Positive Bacteria / Q000254:growth & development; D006863:Hydrogen-Ion Concentration; D009997:Osmotic Pressure; D010100:Oxygen; D011550:Pseudomonas aeruginosa / Q000187:drug effects / Q000254:growth & development* / Q000528:radiation effects; D012965:Sodium Chloride; D013696:Temperature; D014466:Ultraviolet Rays
D003470:Culture Media; D012965:Sodium Chloride; D010100:Oxygen