The kinetics of growth of six heterothallic species of the genus Ascobolus was studied in liquid culture media. The results obtained showed variation among the species in the duration of the different phases of the growth cycle. Four groups can be recognized considering the extension of the exponential phase of growth. The stationary phase, which differs in its length, is frequently very short, entering quickly in the phase of death, accompanied by the autolysis of the mycelium.
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