Formation of Polar Bundles of Pili and the Behavior of Azospirillum brasilenseCells in a Semiliquid Agar |
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Authors: | Shelud'ko A. V. Katsy E. I. |
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Affiliation: | (1) Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, pr. Entuziastov 13, Saratov, 410015, Russia |
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Abstract: | This paper describes the formation of single polar bundles of pili on Azospirillum brasilensecells, 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. brasilensecells 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. brasilensecells. The components of the Fla system may be involved in the regulation of the phenotypic variation of azospirilla. |
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Keywords: | polar bundle of pili twitching motility phenotypic variation Azospirillum brasilense |
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