Effects of dietary glutathione level on growth performance,antioxidant indexes and lipid peroxide content of hepatopancreas in Litopenaeus vannamei

作者：Xie Cong-xin · 发表于：JOURNAL OF FISHERIES OF CHINA · 年份：2007 · 被引用次数：5 · 研究领域：Aquaculture Nutrition and Growth、Aquaculture disease management and microbiota

A feeding experiment was conducted to determine the effects of dietary glutathione(GSH) on growth performance,antioxidant indexes and lipid peroxide content of hepatopancreas in Litopenaeus vannamei.The shrimp,initially weighing about 1.12 g,were fed a control diet(G0) and five treatment diets supplemented with 60,120,180,240 and 300 mg·kg-1 GSH(G60,G120,G180,G240 and G300) respectively.After a 8-week feeding trial,the results showed that,with the increasing of dietary GSH level,weight gain rate(WGR) of the shrimp increased,reaching the highest level at G180,then significantly decreased at a higher level(P0.05).Feed conversion efficiency(FCE) increased significantly with the dietary GSH level increasing,reaching the hightest at G240.The shrimp survival rate of experimental groups significantly increased in comparison with that of control. Dietary GSH had a significantly effect on the activity of antioxidant enzymes in hepatopancreas: the activity of GR at G60 and G120,SOD at G120,G180 and G300,GSH-PX at G120,G180 and G240 were significantly higher than that of control(P0.05).The content of GSH and the total antioxidant ability(T-AOC) in hepatopancreas showed a dose-dependent relationship with dietary GSH level,8.93%-52.57% and 3.02%-37.03% being increased of experimental groups compared with control.With dietary GSH increasing,ROS level in hepatopancreas tends to decrease,showing significant decrease at Group G240 and G300(P0.05),MDA content of each experimental groups was si...