title: [Lysozyme-antilysozyme interactions in protozoa-bacteria communities (a model Tetrahymena-Escherichia community)].
abstract: Lysozyme and antilysozyme activities present in a wide range of microorganisms determine the so-called lysozyme-antilysozyme system of hydrobionts, which greatly contribute to the formation of aquatic biocenoses. However, the mechanism of the functioning of this system in natural freshwater communities remains obscure. The experimental investigation of lysozyme-antilysozyme interactions in a model Tetrahymena--Escherichia community showed that the antilysozyme activity of Escherichia coli leads to incomplete phagocytosis, thus enhancing bacterial survival in a mixed culture with infusoria. The selection and reproduction of bacterial cells resistant to grazing by infusoria determine the character of host-parasite interactions and allow bacteria to survive. It was demonstrated that the antilysozyme activity of microorganisms, which is responsible for bacterial persistency in natural biocenoses, is involved in the maintenance of protozoa-bacteria communities in bodies of water.
authors.affiliation: Institute of Cellular and Intracellular Symbiosis, Ural Division, Russian Academy of Sciences, ul. Pionerskaya 11, Orenburg, 460000 Russia.
authors.forename: O V
authors.initials: OV
authors.lastname: Bukharin
authors.forename: N V
authors.initials: NV
authors.lastname: Nemtseva
mesh_terms: D000818:Animals; D001419:Bacteria / Q000254:growth & development / Q000378:metabolism*; D017753:Ecosystem; D004926:Escherichia coli / Q000254:growth & development / Q000378:metabolism / Q000648:ultrastructure; D056890:Eukaryota / Q000201:enzymology* / Q000382:microbiology; D009113:Muramidase / Q000037:antagonists & inhibitors* / Q000378:metabolism*; D010587:Phagocytosis; D013769:Tetrahymena pyriformis / Q000201:enzymology / Q000382:microbiology / Q000648:ultrastructure
chemical_list: D009113:Muramidase
vernacular_title: Lizotsim-antilizotsimnye vzaimodeĭstviia v protozoĭno-bakterial'nykh soobshchestvakh (na modeli tetrakhimeny-ésherikhii).