一种海洋真菌——裂殖壶菌的营养成分分析  

Analysis of Nutritional Components of a Marine Fungus:Schizochytrium limanium

作　　者：朱路英[1,2] 张学成[2] 王淑芳[1] 常林瑞[1] 

机构地区：[1]鲁东大学生命科学学院,山东烟台264025 [2]中国海洋大学海洋生命学院,山东青岛266003

出　　处：《食品科学》2009年第24期272-275,共4页Food Science

基　　金：鲁东大学学科建设经费资助项目

摘　　要：为评价海洋真菌裂殖壶菌的营养价值,测定该菌的基本营养成分、氨基酸组成及脂肪酸组成。结果显示,在两种不同的氮源条件下,裂殖壶菌的总蛋白、总脂、总糖及灰分分别为9.35%、42.83%、5.27%、4.85%(豆粕水解物为氮源)和42.51%、18.98%、6.38%、5.72%(酵母提取物为氮源)。以轮虫蛋白的必需氨基酸(EAA)为标准,裂殖壶菌的必需氨基酸指数EAAI>0.9,为轮虫的优质蛋白源,但精氨酸或异亮氨酸不能完全满足轮虫需要。而以牡蛎蛋白的EAA为标准,该菌的EAAI为0.78～0.79,为牡蛎的可用蛋白源。该菌中含有高水平的DHA,含量可达14.29%,是一种优质的DHA强化饵料。另外,培养基中氮源种类的不同直接影响该菌的基本营养成分、氨基酸及脂肪酸组成。In order to evaluate nutritional values of a marine fungus, Schizochytrium limanium, its basic nutritional components, amino acid and fatty acid compositions were analyzed. Results indicated that the contents of proteins, lipids, carbohydrates and ash in Schizochytrium limanium were 9.35%, 42.83%, 5.27% and 4.85% using soybean hydrolysates as nitrogen resource and 42.51%, 18.98%, 6.38% and 5.72% using yeast as nitrogen resource, respectively. Using rotifer protein as the reference, essential amino acid index （EAAI） in Schizochytrium limanium were more than 0.90; using oyster protein as the reference, EAAI in Schizochytrium limanium were 0.78-0.79, which suggested that Schizochytrium limanium was the best quality protein material for rotifer and oyster. However, Schizochytrium limanium had limited amino acids such as Arg and Ile for rotifer. Totally 14.29% DHA was determined in Schizochytrium limanium, which also suggested it was a good DHA source. Moreover, nitrogen sources exhibited a direct effect on contents of nutritional components, amino acid and fatty acid compositions.

关 键 词：裂殖壶菌 氨基酸组成 脂肪酸组成 营养价值 

分 类 号：S963.2[农业科学—水产养殖]