Abstract:

Drying and milling were conducted on the liquid-cultured mycelia and fruiting body of Inonotus obliquus. Crude
polysaccharides were significantly more abundant in mycelium than in fruiting body (7.43 g/100 g vs. 2.31 g/100 g), both
of which consisted of fructose, xylose, rhamnose, arabinose, glucose, mannose and galactose. Meanwhile, crude protein
contents in mycelium and fruiting body were determined using the Kjeldahl method to be 6.69 g/100 g and 21.08 g/100 g,
respectively. Amino acid profiles measured by amino acid analyzer suggested that the fruiting bodies contained 14 kinds
of amino acids, and the mycelium contained 16 kinds of amino acids. Furthermore, as analyzed by atomic absorption
spectrometry, both mycelium and fruiting body were rich in K, Fe, Ca, Zn and Mg along with small amounts of Na, Mn and
Se. These results show that the mycelia of I. obliquus are rich in nutrients, and can be used as an alternative to the fruiting
body as a rare wild mushroom in the food and medicinal industries.

Key words: Inonotus obliquus, nutrient component, monosaccharide composition, amino acid, mineral elements