Exopolysaccharide production by the cyanobacterium Anabaena sp. ATCC 33047 in batch and continuous culture

The halotolerant, filamentous, heterocystous cyanobacterium Anabaena sp. ATCC 33047 released, during the stationary growth phase in batch culture and, at low dilution rate, in continuous culture, large amounts of an exopolysaccharide (EPS) to the culture medium. Different environmental, nutritional...

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Bibliographic Details
Published inJournal of biotechnology Vol. 60; no. 3; pp. 175 - 182
Main Authors Moreno, José, Vargas, M.Angeles, Olivares, Héctor, Rivas, Joaquı́n, Guerrero, Miguel G
Format Journal Article
LanguageEnglish
Published Lausanne Elsevier B.V 26.02.1998
Amsterdam Elsevier
New York, NY
Subjects
Anabaena
Anabaena sp
Batch and continuous culture
Biological and medical sciences
Biotechnology
Blue-green alga
Cyanobacterium
Exopolysaccharide production
Freshwater
Fundamental and applied biological sciences. Psychology
Methods. Procedures. Technologies
Microbial engineering. Fermentation and microbial culture technology
Nutritional and environmental conditions
Blue-green alga
Anabaena sp
Cyanobacterium
Batch and continuous culture
Nutritional and environmental conditions
Exopolysaccharide production
Environmental factor
Extracellular
Optimization
Operating conditions
Continuous process
Batchwise
Cyanobacteria
Anabaena
Production
Microorganism culture
Bacteria
Nutrient
Polysaccharide
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Summary:The halotolerant, filamentous, heterocystous cyanobacterium Anabaena sp. ATCC 33047 released, during the stationary growth phase in batch culture and, at low dilution rate, in continuous culture, large amounts of an exopolysaccharide (EPS) to the culture medium. Different environmental, nutritional and physical parameters affected production and accumulation of the EPS. The presence of either a combined nitrogen source or NaCl at high concentration led to decreased EPS production, without affecting cell growth. In contrast, generation of the EPS was markedly enhanced in response to an increase in either air flow rate, temperature or irradiance. In continuous culture, accumulation of EPS in the medium increased in response to a decrease in the dilution rate, with maximal EPS productivity being reached at a dilution rate of 0.03 h −1.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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content type line 23
ISSN:0168-1656
1873-4863
DOI:10.1016/S0168-1656(98)00003-0