Abstract: The effects of sodium glutamine with different concentrations on mixotrophic culture of S. platensis were studied. The results showed that when 3g/L glucose is appended,the content of chlorophyll is 1.9 times of that in control,but the content of phycobiliprotein is only 1.13 times. At the fixed concentration of 3g/L glucose,among the sodium glutamine concentrations 0,0.2,0.6,0.9,1.2,1.5 and 2g/L,1.2g/L is the best,according to the standards of the cell dry weight,the contents of chlorophyll and phycobiliprotein,pollution level of S. platensis.

Key words: sodium glutamine, S. platensis, mixotrophic culture, chlorophyll, phycobiliprotein