期刊
JOURNAL OF MICROBIOLOGY
卷 52, 期 2, 页码 179-183出版社
MICROBIOLOGICAL SOCIETY KOREA
DOI: 10.1007/s12275-014-2720-5
关键词
cyanobacteria; extracellular polysaccharides; light intensity; Nostoc sp.; atomic force microscopy
类别
资金
- National Natural Science Foundation of China [31170464, 30870470]
- National Forestry Public Welfare Industry Research Project [201404204]
A study on the effects of light intensity (40 and 80 mu E/m(2)/sec) on the components and topographical structures of extracellular polysaccharides (EPS) was carried out in cyanobacteria Nostoc sp.. EPS yield increased with light intensity. However, light intensity did not significantly affect the EPS fractions and monosaccharide composition. Higher light intensity generally resulted in higher protein content of EPS in similar fractions. The topographical structure of EPS, investigated by atomic force microscopy, appeared as spherical lumps, chains and networks. The long chains were observed at higher light intensity. Thus, light intensity affected the yield and nature of EPS.
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