Content of Nutritional compositions and Taste Components of Domestic and Foreign Matsutake (Tricholoma matsutake (S. Ito & Imai) Sing.)

Abstract

Proximate composition, the content of minerals, free amino acids, 5'-nucleotides, free sugar and sugaralcohols were measured using 13 specimens of Matsutake from Japan, 13 specimens from Korea, 10 specimens from china and 5 specimens from Canada and a comparison was made between the countries of origin.1. In the proximate composition, there were no differences among the protein contents of the Japanese, Korean and Chinese specimens, but the Canadian specimens had a low protrin content. Ash content was low in the Japanese specimens and high in the Chinese specimens. The amount of carbohydrates was high in the Canadian and Japanese specimens.2. In regard to mineral, calcium content was low in the Japanese specimens and high in the Chinese specimens. Iron content of the Korean and Chinese specimens was higher than those of the Japanese and Canadian specimens.Potassium content of the Canadian specimens was higher than those of the Japanese and Korean specimens.3. No differences were noted among the total free amino acid contents in the Japanese, Korean and Chinese specimens, except the Canadian specimens.The major component of amino acids were glutamic acid, glutamine, arginine, alanine, asparatic acid and ornithine. The specimens from Japan, Korea and China all exhibited a similar overall amino acid composition pattern, but the Canadian specimens had a slightly different pattern.4. Of the 5'-nucleotides, 5'-AMP, 5'-UMP and 5'-GMP were detected. The content of 5'-GMP, which it thought to contribute to taste, was low. The Chinese specimens, however, showed significantly higher than the Korean specimens.5. In regard to free sugars and sugaralcohols, fructose, glucose, mannitol, trehalose were detected.The contents of mannitol and trehalose were particularly high. There was a significantly higher quantity of trehalose content in the Japanese specimens than those in the Chinese and Korean specimens.