Effects of glycerol concentration(41 mmol/L,110 mmol/L and 206 mmol/L)on growth and polysaccharides accumulation of algaIsochrysis zhanjiangensis were investigated in rich-nitrogen and limited-nitrogen culture systems by means of single factor experiments.The results showed that the cell density,content and yield of polysaccharides were higher in 41mmol/L glycerol than those in the other glycerol concentrations.The cell density,content and yield of polysaccharides in rich-nitrogen culture system were 7.73×1...