Distribution of Cellular Carbohydrates during Development of the Mycelium and Fruitbodies of Flammulina velutipes

摘要: Flammulina velutipes (Curt. ex Fr.) Sing. was grown on potato-glucose solution freed of most starch. Glucose uptake and dry weight changes in the colony indicated that large fruitbodies derived their substrates partly from glucose remaining medium cellular constituents stored mycelium small fruitbodies. Changes amounts low molecular carbohydrates, glycogen, four cell wall polysaccharide fractions were followed Trehalose, arabitol, smaller mannitol main carbohydrates. A net loss these compounds occurred after growth ceased. The carbohydrates accumulated fruitbodies, but also metabolized colony. Reducing sugars minor components, included about 30 to 50% a undetermined quantity fructose. Glycogen storage carbohydrate mycelium, It broken down both structures during which only amounts. During same period, almost 45% maximum amount polysaccharides degraded not mycelium.By feeding (14)C-glucose replacement medium, incorporation radioactivity into fruit-body development. Total highest trehalose, next rest found polyols except for few per cent remained endogenous glucose. In specific much lower than trehalose mannitol. labeling patterns suggested mannitol, possibly arabitol translocated stipes pilei.