Most people assume that molds require abundant oxygen for growth, because molds usually are seen growing on the moist surfaces of substances. This, in a very general way, is correct but establishes no idea of the amount of oxygen required for normal growth or the amount required for germination of the many species of molds. The effect of the temperature and solubility of oxygen is even less understood. The purpose of this study was to determine the minimum oxygen required for normal growth and the minimum oxygen required to permit germination of six pure cultures of mold in the presence of nitrogen and the almost complete absence of carbon dioxide. Since both temperature and gas pressure change the solubility of oxygen in the medium, several variations in both of these factors were included.
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Miller et al. (1949) studied this question.
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