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Abstract
SUMMARY: Cultures of Aspergillus niger partially deficient in zinc produce much larger quantities of acid per unit of glucose used than do normal cultures. This fact has been the basis of the current suggestion that zinc plays a part in the utilization of carbohydrate by fungi. The experiments described here show that partial deficiencies, not only of zinc but also of iron, copper, manganese, phosphorus, magnesium and potassium all had a similar effect on the production of acid by a strain of A. niger. It would appear that the effect of zinc on the way in which carbohydrate is utilized is not a specific effect and indicates no more about the role of zine than about the role of any other inorganic nutrient.
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© Society for General Microbiology 1951