EN
The substratum photomorphogenesis — the increase of dry weight in light as compared with darkness — takes place only on the nutrient solution with yeast extract. On a synthetic medium with the phosphate level varying from 2.87 to 22.96 mM, the dry weight of mycelia is the same in light and in darkness. In a similar way the phosphorus content in the mycelia and the amount of this element taken up are not related to light conditions. The organism utilizes about 66% of the phosphate present in the nutrient solution.