title: [Formation of polar bundles of pili on a cell and the behavior of Azospirillum brasilense in semiliquid agar].
abstract: This paper describes the formation of single polar bundles of pili on Azospirillum brasilense cells, the twitching motility of cell aggregates, and a new type of social behavior--the dispersal of bacterial cells in semiliquid agar associated with the formation of granular inclusions (the so-called Gri+ phenotype)--which is an alternative to swarming (the Swa+ phenotype). The wild-type A. brasilense cells occurring in a semiliquid agar may show either the Swa+Gri-, or Swa-Gri-, or Swa-Gri+ phenotype. The formation of single polar flagella (Fla) or polar bundles of pili may reflect two alternative states of A. brasilense cells. The components of the Fla system may be involved in the regulation of the phenotypic variation of azospirilla.
authors.affiliation: Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, pr. Entuziastov 13, Saratov, 410015 Russia. root@ibppm.saratov.su
authors.forename: A V
authors.initials: AV
authors.lastname: Shelud'ko
authors.forename: E I
authors.initials: EI
authors.lastname: Katsy
mesh_terms: D000362:Agar; D015806:Azospirillum brasilense / Q000235:genetics / Q000648:ultrastructure*; D003470:Culture Media; D010861:Fimbriae, Bacterial; D008854:Microscopy, Electron; D009154:Mutation; D010641:Phenotype
chemical_list: D003470:Culture Media; D000362:Agar
vernacular_title: Obrazovanie na kletke Azospirillum brasilense poliarnogo puchka pileĭ i povedenie bakteriĭ v poluzhidkom agare.