Production and Nutritional Composition of King Oyster Culinary-Medicinal Mushroom Pleurotus eryngii (Agaricomycetes) Biomass from Brazil.

The present study aimed to evaluate the nutritional composition and production of mycelial biomass of Pleurotus eryngii in different culture media, formulated with infusion of purple-skinned sweet potato, glucose concentrations, and the presence or absence of yeast extract. The mushroom was grown for 15 days at 25°C and 150 rpm. The best production of mycelial biomass occurred in the culture medium with 40 g/L of glucose plus yeast extract. At the second cultivation, the fungus entered the exponential growth phase from days 6 until 14. These results indicate that the insertion of nutritional sources in purple-skinned sweet potato media positively influences mycelial biomass production and its nutritional characteristics make it useful for food industry applications.