红托竹荪(Dictyophora rubrovolvata)菌托中营养品质的研究

Study on nutritional characteristics of the volva of Dictyophora rubrovolvata

红托竹荪(Dictyophora rubrovolvata)是竹荪中的珍品,已成为云南、四川、贵州、福建等地主要经济菌种之一。红托竹荪中菌托约占全株鲜重的40%,被摘除废弃,造成极大的资源浪费。为充分开发和利用该资源,测定了红托竹荪菌托的基本营养成分,分析了其氨基酸组成和蛋白质组分,从而评价了其营养品质。结果表明:红托竹荪菌托中粗蛋白含量占干重的26.74%,真蛋白质占粗蛋白质的91.14%,蛋白功效比为2.8,必需氨基酸含量较高,氨基酸评分为105,含硫氨基酸是其限制性氨基酸。另外,蛋白质组分分析显示菌托中清蛋白含量较高,约占粗蛋白的69.52%,显著高于其它常见食用菌。结果表明,红托竹荪菌托是优质蛋白质资源。

Dictyophora rubrovolvata is one of the commercially important mushroom species,and has been widely cultivated in Sichuan,Guizhou,Yunnan and Fujian provinces.However,the volva accounts for about 40% of the whole mushroom,and most of them are dumped without utilization.To effectively utilize the waste,the proximate composition,the amino acid composition and the fractions of protein in the volva were studied.Results showed that the volva was rich in crude protein with 26.74% of dry weight,and the real protein accounted for 91.14% of the crude protein.P-PER value of the protein was 2.8,and the amino acid score was 105.Furthermore,albumin content in volva reached 69.52% of crude protein.The results indicated that the protein quality of volva was significant higher than that of other edible mushrooms,and the volva might be a resource with high quality protein.