Archives of Microbiology

, Volume 186, Issue 6, pp 475–483 | Cite as

The lipopeptides mycosubtilin and surfactin enhance spreading of Bacillus subtilis strains by their surface-active properties

  • Valérie Leclère
  • Romain Marti
  • Max Béchet
  • Patrick Fickers
  • Philippe Jacques
Original Paper

Abstract

The colonizing behaviour and the pellicle formation of Bacillus subtilis strains producing different families of lipopeptides were evaluated under several cultural conditions. The pattern of lipopeptides produced determined the architecture of the colony on a swarming medium as well as the flotation and the thickness of the pellicle formed at the air/liquid interface. The overproduction of mycosubtilin, a lipopeptide of the iturin family, led to increased spreading but had no effect on pellicle formation. A physico-chemical approach was developed to gain an insight into the mode of action of the biosurfactants facilitating the colonization. A relationship between surface tension of the culture medium and spreading of a lipopeptide non-producing strain, B. subtilis 168, was established. Goniometry was used to highlight the modification of the in situ wettability in the area where spreading was enhanced. On a solid medium, co-cultures of a surfactin producing with other strains showed a diffusion ring of the surfactin around the colony. This ring characterized by a higher wettability favoured the propagation of other colonies.

Keywords

Bacillus subtilis Spreading Swarming Surfactin Mycosubtilin Surface tension Wettability 

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Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  • Valérie Leclère
    • 1
  • Romain Marti
    • 1
  • Max Béchet
    • 1
  • Patrick Fickers
    • 1
  • Philippe Jacques
    • 1
  1. 1.ProBioGEM, Laboratoire des Procédés Biologiques, Génie Enzymatique et Microbien, Polytech’Lille, Avenue Paul LangevinUniversité des Sciences & Technologies de LilleVilleneuve d’Ascq CedexFrance

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