Contents of Free Sugars, Free Sugar Alcohols and Organic Acids in Different Grades of Dried Shiitake Mushroom (Lentinus edodes Sing)

Abstract

The amonts of free sugar, free sugar alcohols and organic acids inthe eight grades (Hanadonko, Jyodonko, Namidonko, Kotsubudonko, Jyokoshin, Namikoshin, Chayori and Kuroko) of dried Shiitake mushroom were determined by gas-liquid chromatography. The amounts of D-arabitol, D-mannitol and rehalose were 1.2-7.7%, 2.2-6.2% and 3.7-9.4% respectively. Donko type was especially rich in trehalose and D-arabitol, and Koshill type was rich in D-mannitol. Organic acid contents were found in the range of 1.1-1.5% in samples and ten kinds of organic acids were identified. Malic, Fumaric, Pyroglutamic, and Citric Acids were found to be major of them. Donko type was especially rich in pyroglutamic and citric acid, whereas Koshin type was rich in fumaric acid.