Abstract:
Boletus edulis is also known as 'the king bolete'. It has many names such as king, cep, porcini, steinpilz, penny bun and many others. It is highly variable in coloration. Boletus edulis is a large mushroom with a greasy to tacky, bald, brown cap and a meaty, swollen stem that features fine reticulation. The pore surface is initially white, with "stuffed" pores but as the mushroom matures the pores become more visible and the pore surface becomes greenish yellow. The flesh does not change color when the mushroom is sliced, and its surfaces do not bruise on handling. To estimate the nutritive value of Boletus edulis fruit bodies were dried in an oven at 380C until a constant weight was obtained. The sample was powdered and used for nutritive analysis. The aim of the study was to determine the crude protein content, crude fiber content and total free amino acids according to standard methods mentioned under materials and methods. Crude protein, crude fiber and total free amino acids contents were found to be 31.86%, 8.9% and 25.29 mg/g (d. w.) respectively.

Keywords: Crude protein, crude fiber, total free amino acids composition, Boletus edulis