The chemical components in the vegetative mycelia of Basidiomycotina

Abstract

　The chemical components in the vegetative mycelia of Basidiomycotina of nine species (Agrocybe cylindracea, Hericium erinaceum, Hypsizygus marmoreus, Mycoleptodonoides aitchisonii, Pholiota adiposa, Pleurotus cystidiosus, Pleurotus sajor-caju, Pleurotus pulmonarius, Pleurotus salmoneostramineus) were investigated. On a dry-weight basis, the proximate component contents were as follows: crude protein, 28. 4-44.6%; crude fat, 3.8-5.8%; crude ash, 3.3-5.5%; carbohydrate, 44.1-63.2%. The low molecular weight carbohydrate contents were in the range of 2.8-18.5%. Trehalose, mannitol, glucose, fructose and arabitol were detected in these vegetative mycelia, of which trehalose and mannitol were predominant. The polysaccharide contents were in the range of 32.4-48.1%. The distributions and contents of polysaccharide fractions showed low similarities among different species of vegetative mycelia. The organic acid contents were in the range of 0.6-1.4%, and malic, pyroglutamic, fumaric, citric, and succinic acids were predominant. The free amino acid contents were in the range of 1.8-9.4%, and alanine, glutamic acid, glutamine, serine, lysine, arginine and ornithine were predominant.