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Production of Exopolysaccharides by Strains of Streptococcus thermophilus

Purwandari, Umi and Vasiljevic, Todor (2010) Production of Exopolysaccharides by Strains of Streptococcus thermophilus. Microbiology Indonesia, 4 (1). pp. 39-43. ISSN 1978-3477 (print) 2087-8575 (online)

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Abstract

Two strains of Streptococcus thermophilus producing capsular and capsular-ropy exopolysaccharides (EPS) were examined for their growth and EPS production in M17 medium supplemented with glucose, galactose or lactose and incubated at 30, 37 or 42°C for 24 hours. Growth parameters (viable cells, OD, lactate production, pH) and EPS production were determined. Flow behavior of the EPS dispersions was assessed as a function of concentration and temperature. Culture growth during incubation was affected by types of sugar, temperature and time. Growth was enhanced by glucose, lactose and higher incubation temperature. EPS concentration in the medium was greater in the presence of glucose and galactose. Despite the restricted growth conditions, the capsular strain produced comparable levels of EPS to the capsular-ropy strain even under sub-optimal incubation temperature.

Item Type: Article
Uncontrolled Keywords: ResPubID19806, Streptococcus thermophilus, exopolysaccharides, growth conditions
Subjects: Faculty/School/Research Centre/Department > School of Biomedical and Health Sciences
FOR Classification > 0908 Food Sciences
SEO Classification > 8602 Dairy Products
Depositing User: VUIR
Date Deposited: 14 Jun 2012 06:52
Last Modified: 14 Jun 2012 06:52
URI: http://vuir.vu.edu.au/id/eprint/7361
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