Production and chemical characterization of an exopolysaccharide synthesized by psychrophilic yeast strain Sporobolomyces salmonicolor AL1 isolated from Livingston Island, Antarctica

• DOI: 10.1007/s12223-010-0092-8
• Publication Date: 2011-01-20T13:48:29Z
• Authors: A. Poli; G. Anzelmo; G. Tommonaro; K. Pavlova; A. Casaburi; B. Nicolaus
• Keywords: Psychrophile; Strain (injury); Yeast extract

The exopolysaccharide (EPS) production by psychrophilic Antarctic yeast Sporobolomyces salmonicolor AL1 reached the maximum yield in medium containing sucrose (50 g/L) and diammonium sulfate (2.5 g/L) after a 5-d fermentation (5.64 g/L) at 22 °C, the dynamic viscosity of the culture broth reaching (after 5 d) 15.4 mPa s. EPS showed a mannan-like structure and high molar mass, and did not affect cellular viability and proliferation of murine macrophages. It exhibited also a protective effect against the toxic activity of Avarol.