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Territorial interactions between two Myxococcus Species

D R Smith1, M Dworkin

  • 1Department of Microbiology, University of Minnesota, Minneapolis 55455-0312.

Journal of Bacteriology
|February 1, 1994
PubMed
Summary
This summary is machine-generated.

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Myxobacteria species compete for territory, with one producing a bacteriocin that inhibits the other. This interaction demonstrates how bacteriocins establish territorial dominance in myxobacterial communities.

Area of Science:

  • Microbiology
  • Ecology
  • Bacteriology

Background:

  • Myxobacteria rarely share territories, suggesting mechanisms for territorial dominance.
  • Previous observations show Myxococcus xanthus and Stigmatella aurantiaca swarms separate.
  • Interactions between closely related species like M. xanthus and M. virescens were unexplored.

Purpose of the Study:

  • To investigate territorial dominance among myxobacteria.
  • To elucidate the mechanisms behind myxobacterial territorial interactions.
  • To determine if bacteriocins play a role in establishing territoriality.

Main Methods:

  • Co-culturing of kanamycin-resistant M. xanthus and kanamycin-sensitive M. virescens.
  • Observing cell sorting and fruiting body formation under developmental conditions.

Related Experiment Videos

  • Differential viable counts to assess growth inhibition and extracellular components.

    • Main Results:

    • M. xanthus and M. virescens sorted into separate territories.
    • Each species produced an extracellular inhibitor affecting the other.
    • M. virescens consistently outcompeted M. xanthus.
    • The inhibitory substance from M. virescens exhibited bacteriocin-like properties.

    Conclusions:

    • Myxobacteria establish territorial dominance through inhibitory substances.
    • Bacteriocin production by M. virescens is a likely mechanism for territorial control.
    • This study provides an example of the ecological role of bacteriocins in interspecies competition.