Abstract
For the first time, properties and structural peculiarities of exopolysaccharides produced by phototrophic bacteria Rhodobacter sphaeroides isolated from hydrocarbonate mineral waters in Armenia with a degree of mineralization in limits of 3.5-5.0g/l, pH 7.2 have been studied. It is noteworthy that despite membership of the isolated strains in one and the same genus, these strains are significantly different by the nature of the produced exooligosaccharide. The studies implemented show that phototrophic bacteria are able to synthesize exopolysaccharides with different compositions and structures: cyclic and linear, depending on the cultivation conditions.
Highlights
Microorganisms belonging to various Genera and producing exopolysaccharides have been described [1,2,3,4,5,6]
The biosynthesis and properties of polysaccharides produced by phototrophic bacteria are not entirely studied and represent prospective areas of study
Phototrophic bacteria Rhodobacter sphaeroides, designated as A-1 and D-1 have been isolated from hydrocarbonate water sources of Armenia (Arzni and Jermuk) with a degree of mineralization of 3.5–5.0 g/l, pH 7.2
Summary
Microorganisms belonging to various Genera and producing exopolysaccharides have been described [1,2,3,4,5,6]. The microbial polysaccharides are very important for cells in population, in the process of adhesion and in protection of cells [7,8,9,10,11]. Many microbial polysaccharides are used in food production, pharmaceutical, cosmetic, textile industries and other fields. The structure and function of polysaccharides producing by different microorganisms have been studied [12,13,14,15,16,17,18,19]. Phototrophic microorganisms represent considerable interest for productions various biologically active compounds - vitamins, carotenoids, organic acids, enzymes, etc. The biosynthesis and properties of polysaccharides produced by phototrophic bacteria are not entirely studied and represent prospective areas of study
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