Microbial Ecology

, Volume 6, Issue 3, pp 277–280

Aerotaxis and chemotaxis ofAzospirillum brasilense: A note

  • Yaacov Okon
  • Lutfu Cakmakci
  • Israel Nur
  • Ilan Chet
Article

Abstract

Azospirillum brasilense was attracted to capillaries containing either phosphate buffer, distilled water, or saline. The number of bacteria in these capillaries was 3−4×104, after 1 h of incubation. In the presence of phosphate buffer + attractants, the number of cells accumulated in the capillary increased only to 5×104–1.1×105 cells. It was not possible, therefore, to measure chemotaxis inA. brasilense as distinct from aerotaxis by the capillary method. Chemotaxis was observed in semi-solid agar plates and was determined by a growth band oriented towards the attractant. Positive chemotactic response was obtained with peptone, tryptone, yeast extract, amino acids, organic acids, arabinose and galactose.

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Copyright information

© Springer-Verlag New York Inc 1980

Authors and Affiliations

  • Yaacov Okon
    • 1
  • Lutfu Cakmakci
    • 1
  • Israel Nur
    • 1
  • Ilan Chet
    • 1
  1. 1.Department of Plant Pathology and Microbiology, Faculty of AgricultureHebrew University of JerusalemRehovotIsrael
  2. 2.Dept. of Agricultural Microbiology, Faculty of AgricultureUniversity of AnkaraAnkaraTurkey

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