FOOD SCIENCE ›› 2010, Vol. 31 ›› Issue (19): 92-95.doi: 10.7506/spkx1002-6630-201019018

• Basic Research • Previous Articles     Next Articles

Effect of Nitrogen on the Growth and Polysaccharide Content of Nostoc flagelliforme

TANG Jun1,2,WAN Neng2,HU Zheng-yu1,*   

  1. 1.Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China;
    2. Department of Biology and Food Engineering, Changshu Institute of Technology, Changshu 215500, China
  • Received:2010-02-24 Revised:2010-09-17 Online:2010-10-15 Published:2010-12-29
  • Contact: HU Zheng-yu1


Cultivation of Nostoc flagelliforme in nitrogen-containing (BG11) and non-nitrogen-containing (BG110) media was conducted for figuring out the effects of nitrogen on the growth and the contents of phycobiliprotein (PC), allophycocyanin (APC), phycoerythrin (PE) and endo- and exopolysaccharides of Nostoc flagelliforme were investigated. The results showed that after 20 d cultivation, compared to BG110 medium, N. flagelliforme cultured in BG11 medium had much higher contents of Chl a, carotenoides, PE, APC and PC, but much lower contents of endo- and exo polysaccharides. The maximum content of endopolysaccharides was 1.03 mg/mL in BG110 and 0.78 mg/mL in BG11, while that of exopolysaccharides was 243.8μg/mL in BG110 and 74.9μg/mL in BG11. These results indicate that nitrogen deficiency may inhibit the growth of N.flagelliforme, but promote the synthesis of endo- and exopolysaccharides to a certain extent.

Key words: Nostoc flagelliforme, nitrogen, polysaccharide, phycobiliprotein

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