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  • Title: [Role of exopolymeric substances of corrosion-aggressive bacteria in the biofilm formation on the steel surface].
    Author: Purish LM, Asaulenko LH, Abdulina DR, Vasyl'ev VM, Iutyns'ka HO.
    Journal: Mikrobiol Z; 2011; 73(1):3-9. PubMed ID: 21442946.
    Abstract:
    It had been done the comparative study of the exopolymeric substances (EPS) synthesized by the sulfidogenic microbial community and monocultures of Desulfovibrio sp. 10, Bacillus subtilis 36 and Pseudomonas aeruginosa 27 under various growth models as biofilm and plankton was performed. It was established that biofilm-produced exopolymers contained increased amount of glucose and fucose, while planktonic ones had more amount of mannose and rhamnose. The amount of rhamnose was 24% of the total amount of carbohydrates in the planktonic-produced exopolymers synthesized by Pseudomonas aeruginosa 27 and Bacillus subtilis 36. Glucuronic acid, galactosamine and glucosamine along with neutral carbohydrates were found in the composition of EPS synthesized by associative cultures, while only galactosamine was found in EPS synthesized by Desulfovibrio sp. 10. The amount of hexuronic acids and hexozamines was, respectively, 4.6 and 1.6 times higher in the biofilm formed by Pseudomonas aeruginosa 27 on the steel surface, than in the planktonic exopolymers. It is discussed the role in the biofilm formation of dominative members of the corrosion-aggressive microbial community.
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