THE EFFECT OF OXYGEN TENSION ON GROWTH, CONIDIATION, AND ALCOHOL PRODUCTION OF NEUROSPORA CRASSA

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Abstract
Cultures of Neurospora crassa that are shaken are capable of producing conidia on an NH[image] medium which does not support conidial formation under standing conditions. A decrease in oxygen tension from 160 mm Hg causes a regular decrease in growth rate, a promotion in alcohol production, and a delay in conidia formation. In a medium with NO[image] as the nitrogen source, oxygen tensions from 160 to 60 mm Hg do not greatly alter the growth rates, alcohol production is increased, and conidiation is delayed. Oxygen tensions below 60 mm Hg further delay conidiation, sharply decrease dry weight, and accelerate the production of alcohol 20 to 30% over amounts produced in the NH[image] medium.