CONTINUITY OF PSYCHROPHILIC AND MESOPHILIC GROWTH CHARACTERISTICS IN THE GENUS ARTHROBACTER

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Abstract
Roth, Norman G. (Whirlpool Corp., St. Joseph, Mich.) and Robert B. Wheaton. Continuity of psychrophilic and mesophilic growth characteristics in the genus Arthrobacter. J. Bacteriol. 83:551–555. 1962.—The effect of temperature on growth of seven members of the genus Arthrobacter was determined at 0, 7, 20, 30, and 37 C. In general, no sharp cutoff point was observed between growth-temperature requirements of psychrophilic and mesophilic bacteria. There appeared to be a continuous gradation among members of this genus in ability to initiate and maintain growth at 0 C. The total number of generations produced was not greatly affected by incubation temperature, provided that growth occurred. However, the time required to attain maximal growth was greatest at psychrophilic temperatures.

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