Optimization of medium and cultivation conditions for enhanced exopolysaccharide yield by marine Cyanothece sp. 113  

作　　者：苏传东 池振明 卢伟东 

机构地区：[1]UNESCO Chinese Center of Marine Biotechnology, Ocean University of China

出　　处：《Chinese Journal of Oceanology and Limnology》2007年第4期411-417,共7页中国海洋湖沼学报（英文版）

基　　金：the NSFC (No. 30328021)

摘　　要：Cyanothece sp. 113 is a unicellular, aerobic, diazotrophic and photosynthetic marine cyanobacterium. The optimal medium for exopolysaccharide yield by the strain was 70.0 g/L of NaCl, and 0.9 g/L of MgSO4 based on the modified F/2 medium for cultivation of marine algae. The optimal cultivation condition for exopolysaccharide yield by this cyanobacterial strain was 29℃, aeration, and continuous illumination at 86.0 μE/M^2/S. Under the optimal conditions, over 18.4 g/L of exopolysaccharide was produced within 12 days. This was so far the highest exopolysaccharide yield produced with strains of Cyanothece sp. obtained.Cyanothece sp. 113 is a unicellular, aerobic, diazotrophic and photosynthetic marine cyanobacterium. The optimal medium for exopolysaccharide yield by the strain was 70.0 g/L of NaCl, and 0.9 g/L of MgSO4 based on the modified F/2 medium for cultivation of marine algae. The optimal cultivation condition for exopolysaccharide yield by this cyanobacterial strain was 29°C, aeration, and continuous illumination at 86.0 μE/M2/S. Under the optimal conditions, over 18.4 g/L of exopolysaccharide was produced within 12 days. This was so far the highest exopolysaccharide yield produced with strains of Cyanothece sp. obtained.

关 键 词：Cyanothece EXOPOLYSACCHARIDE N2 fixation PHOTOSYNTHESIS marine cyanobacteria 

分 类 号：TQ28[化学工程—有机化工]