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Applied and Environmental Microbiology, August 1998, p. 2906-2913, Vol. 64, No. 8
0099-2240/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.

Spatial and Temporal Deposition of Hyphomonas Strain VP-6 Capsules Involved in Biofilm Formation

Stephen E. Langille and Ronald M. Weiner*

Department of Microbiology, University of Maryland, College Park, Maryland

Received 23 February 1998/Accepted 12 May 1998

Hyphomonas strain VP-6 is a prosthecate bacterium isolated from the Guayamas vent region and is a member of a genus of primary and common colonizers of marine surfaces. It adheres to solid substrata as a first step in biofilm formation. Fine-structure microscopy and the use of specific stains and lectins reveal that it synthesizes two different extracellular polymeric substances (EPS). One is a temporally synthesized, polar holdfast EPS, and the other is a capsular EPS that is present during the complete life cycle and surrounds the entire cell, including the prosthecum. The timing and location of Hyphomonas strain VP-6 EPS elaboration correlate with adhesion to surfaces, suggesting that the EPS serves not only as the biofilm matrix but also as a primary adhesin. The temporality and polarity of VP-6 EPS expression substantially differ from those properties of Hyphomonas strain MHS-3 EPS expression.

* Corresponding author. Mailing address: Department of Microbiology, University of Maryland, College Park, Md. Phone: (301) 405-5446. Fax: (301) 314-9489. E-mail: RW19{at}umail.umd.edu.

Applied and Environmental Microbiology, August 1998, p. 2906-2913, Vol. 64, No. 8
0099-2240/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.


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Copyright © 1998 by the American Society for Microbiology. All rights reserved.