The assimilation of phosphorus by Aspergillus niger and Cunninghamella SP

Smith, F.B.; Brown, P.E.; Millar, H.C.

The assimilation of phosphorus by Aspergillus niger and Cunninghamella SP

1935

Smith, F.B. | Brown, P.E. | Millar, H.C.

Experiments were conducted in a study of phosphorus assimilation by Aspergillus niger and Cunninghamella sp. to determine the relationship of the weight of mycelium to the concentration of phosphorus in the medium. It was found that the weight of Aspergillus niger mycelium in Niklas medium to which soil was added was roughly proportional to the concentration of phosphorus in the medium over the range from 0 to about 60 p.p.m. of phosphorus. It was concluded that the weight of Aspergillus niger mycelium in the Niklas medium to which soil has been added may be used to indicate roughly the amount of phosphorus available to Aspergillus niger if the technic employed is carefully standardized. Whether or not the phosphorus available to Aspergillus niger represents the amount of phosphorus available to crop plants was not determined.

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