| Abstract: | The growth and amino acid contents of the cyanobacterium,Spirulina platensis strain NIES 46, were investigated using ammonium, nitrate, nitrite, or urea as the sole nitrogen source in a batch culture.
Chlorophylla concentration was highest at 2,096 μg/L in the nitrate group after 10 days of cultivation, while the dry weight ofS. platensis was highest at 4.5 g/L in the ammonium group after 30 days of cultivation. The total amino acid content was highest at 174
mg/g dry weight ofS. platensis in the urea group at the end of the cultivation period, yet the amino acid patterns forS. platensis were similar for all the experimental groups. Therefore, it seemed that the growth and amino acid composition ofS. platensis varied depending on the type of nitrogen sources, while the amino acid patterns were not changed. Also, the most efficient
harvesting time forS. platensis seemed to be approximately 10 days after cultivation. |
