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ABSTRACT
The phosphorus content of homokaryotic colonies of Schizophyllum commune was found to vary from 0.5 to 2% of dry weight depending upon age. Colonies grown on minimal medium (9.12 mM Pi) showed decreasing mycelial phosphorus as they aged. Colonies grown on phosphate-deficient medium (10 μM Pi) had significantly less mycelial phosphorus than those grown on minimal medium; however, the phosphorus content increased with the age of the colonies. These results correlated well with the low phosphate derepression of acid phosphatase specific activity and isozyme complement previously described for S. commune.