Abstract
The space of diffusive distribution of neutral hydrophilic macromolecules (dextrans with molecular sizes of 1.5 to 9 nm in the Stokes’ radius values) in the mucous surface structures (MSS) of intact bacterial cells has been studied for the first time on cyanobacteria. Cyanobacterial species and strains under study belong to different taxonomic groups, the members of which form MSS of various morphology and ultrastructure and can grow in association with plants and animals, inter alia as mucous microcolonies. The range of permeability has been determined by the fractionation of polydisperse dextrans method, previously applied for plants, in combination with electron microscopy. Dextrans are supposedly distributed in the MSS polysaccharide matrix in accordance with their sizes, in much the same way as in a macroporous unitary gel. The similarity of the chemical composition and macromolecular organization of cyanobacterial MSS with pectins of plant cell walls and the role of MSS and the intercellular matrix as permeability barriers in associative interactions of microorganisms are under consideration.
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Original Russian Text © O.I. Baulina, K. Titel, O.A. Gorelova, O.V. Malai, R. Ehwald, 2008, published in Mikrobiologiya, 2008, Vol. 77, No. 2, pp. 232–240.
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Baulina, O.I., Titel, K., Gorelova, O.A. et al. Permeability of cyanobacterial mucous surface structures for macromolecules. Microbiology 77, 198–205 (2008). https://doi.org/10.1134/S0026261708020136
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DOI: https://doi.org/10.1134/S0026261708020136