Competition between microorganisms as affected by temperature, pH, and the sodium chloride (NaCl) concentration was investigated by selective replication from gradient plates. Salmonella typhimurium was inhibited by Pseudomonas putida at 20 and 23 degrees C but not 30 and 35 degrees C. P. putida no longer grew at the extremes of pH and NaCl concentration, particularly at 30 and 35 degrees C.
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Thomas et al. (1993) studied this question.
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