Journal of Microbiology

The Microbiological Society of Korea (한국미생물학회)
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Isolation and Identification of Biofilm-Forming Marine Bacteria on Glass Surfaces in Dae-Ho Dike, Korea

  • Kwon, Kae-Kyoung (Marine Microbiology Lab, Korea Ocean Research & Development Institute) ;
  • Lee, Hyun-Sang (Marine Microbiology Lab, Korea Ocean Research & Development Institute) ;
  • Jung, Sung-Young (Marine Microbiology Lab, Korea Ocean Research & Development Institute) ;
  • Yim, Joung-Han (Marine Microbiology Lab, Korea Ocean Research & Development Institute) ;
  • Lee, Jung-Hyun (Marine Microbiology Lab, Korea Ocean Research & Development Institute) ;
  • Lee, Hong-Kum (Marine Microbiology Lab, Korea Ocean Research & Development Institute)
  • Published : 2002.12.01
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Abstract

Bacterial strains were isolated from biofilms formed on glass slides submerged in seawater in Dae-Ho Dike. Eight strains showing fast attaching ability were selected and identified. Their exopolysaccharide (EPS)-producing ability and EPS properties were characterized. Based on Microlog System, 4 among the 8 strains were identified as Micrococcus luteus and the rest were Bacillus thuringiensis, Bacillus megaterium,, Staphylococcus saprophyticus and Agrobacterium vitis. A, vitis was reidentified as Sulfitobacter pontiacus based on 16S rDNA sequence data. The amount of water-soluble EPS produced by the 8 strains ranged from 0.114 to 1.329 g$.$l$\^$-1/ and the productivity was negatively correlated with the cell biomass. The molecular weight of the produced EPS ranged from 0.38 to 25.19$\times$10$\^$4/ Da. Glucose and galactose were ubiquitous sugar components. Mannose, ribose, and xylose were also major sugar components. The molecular weight and composition of the EPS showed strain-specific variation.

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