| Summary: | 碩士 === 國立臺灣大學 === 食品科技研究所 === 99 === Edible mushroom is a rich source of non-digestible carbohydrate and dietary fiber. This study examined carbohydrate profile in selected 21 edible mushrooms. The total dietary fiber contents of tested edible mushrooms were in the range of 25 ~ 83% on dry basis. Water-soluble polysaccharide was the major component of water-soluble dietary fiber. Galactose, glucose and mannose were the major sugar components of water-soluble polysaccharides from all of tested mushrooms. The molar ratio of galactose, glucose and mannose were in the range of 9.80 ~ 42.51%, 11.85 ~ 54.87 % and 4.92 ~ 38.05%, respectively. Some exceptions were those from Auricularia auricula-judae and Tremella fuciformis which were low in galactose and glucose but high in xylose and mannose with relative high amount of uronic acids. The one from Agrocybe cylindracea was high in galactose, glucose and xylose, but low in mannose. Some of samples also contained significant amount of fucose including Hypsizigus marmoreus, Lentinula edodes, Pleurotus nebrodensis, Agrocybe cylindracea, Flammulina velutipes and Tremella fuciformis. Many of mushrooms contained branched (1,3; 1,6)-β-D-glucans, the well-known bioactive glycan, in the range of 29 ~ 211 mg/g on dry basis, except Agaricus bisporus, A. blazei, Auricularia auricula-judae and Tremella fuciformis. The degree of branching of the (1,3; 1,6)-β-D-glucans were in the range of 0.16 ~ 0.29 for those mushrooms with significant amount of the glucan. Selected edible mushrooms also contained significant amount of sugar alcohols, arabitol, meso-erythritol, glycerol, mannitol, myo-Inositol and xylitol, and trehalose.
|
|---|
