biofilm formation of mucosa-associated methanoarchaeal strains
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ID: 228220
2014
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Abstract
Although in nature most microorganisms are known to occur predominantly in consortia or biofilms, data on archaeal biofilm formation are in general scarce. Here, the ability of three methanoarchaeal strains, Methanobrevibacter smithii and Methanosphaera stadtmanae, which form part of the human gut microbiota, and the Methanosarcina mazei strain Gö1 to grow on different surfaces and form biofilms was investigated. All three strains adhered to the substrate mica and grew predominantly as bilayers on its surface as demonstrated by confocal laser scanning microscopy analyses, though the formation of multi-layered biofilms of M. stadtmanae and M. smithii was observed as well. Stable biofilm formation was further confirmed by scanning electron microscopy analysis. M. mazei and M. smithii also formed multi-layered biofilms in uncoated plastic µ-dishes™, which were very similar in morphology and reached a height of up to 40 µm. In contrast, biofilms formed by M. stadtmanae reached only a height of 2 µm. Staining with the two lectins ConA and IB4 indicated that all three strains produced relatively low amounts of extracellular polysaccharides most likely containing glucose, mannose and galactose. Taken together, this study provides the first evidence that methanoarchaea can develop and form biofilms on different substrates and thus, will contribute to our knowledge on the appearance and physiological role of M. smithii and M. stadtmanae in the human intestine.
| Reference Key |
ebang2014frontiersbiofilm
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| Authors | ;Corinna eBang;Claudia eEhlers;Alvaro eOrell;Alvaro eOrell;Daniela ePrasse;Marlene eSpinner;Stanislav N. Gorb;Sonja-Verena eAlbers;Ruth A. Schmitz |
| Journal | journal of magnetic resonance (san diego, calif : 1997) |
| Year | 2014 |
| DOI |
10.3389/fmicb.2014.00353
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| URL | |
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