Composition and non-volatile taste components of Hypsizigus marmoreus

Two strains of Hypsizigus marmoreus (Peck.) Bigelow (Tricholomataceae) are successfully cultivated and commercially available in Taiwan, and their composition and non-volatile taste components of fruit bodies and mycelia were studied. Both fruit bodies were higher than mycelia in contents of carbohydrate, ash and fiber but lower in contents of fat and protein. Total sugar and polyol contents were 45.47-91.50 mg/g and total free amino acid contents were in the descending order of white strain fruit bodies (122.97) > normal strain fruit bodies (95.94) > white strain mycelia (53.20) > normal strain mycelia (46.87 mg/g). Monosodium glutamate-like components of both fruit bodies were 3-4-fold higher than those of both mycelia. Total 5′-nucleotides contents were 6.43-11.02 mg/g with white strain fruit bodies being the highest. Equivalent umami concentrations of both fruit bodies were higher than those of mycelia. Overall, H. marmoreus fruit bodies possessed highly intense umami taste.