Article (Scientific journals)
The lipopeptides mycosubtilin and surfactin enhance spreading of Bacillus subtilis strains by their surface-active properties.
Leclere, Valerie; Marti, Romain; Bechet, Max et al.
2006In Archives of Microbiology, 186 (6), p. 475-83
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Keywords :
Bacillus subtilis/cytology/drug effects/physiology; Culture Media; Lipopeptides; Lipoproteins/pharmacology; Peptides, Cyclic/pharmacology; Surface Properties; Surface-Active Agents/pharmacology; Wettability
Abstract :
[en] 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.
Disciplines :
Microbiology
Author, co-author :
Leclere, Valerie
Marti, Romain
Bechet, Max
Fickers, Patrick ;  Université de Liège - ULiège > Chimie et bio-industries > Bio-industries
Jacques, Philippe ;  Université de Liège - ULiège > Chimie et bio-industries > Bio-industries
Language :
English
Title :
The lipopeptides mycosubtilin and surfactin enhance spreading of Bacillus subtilis strains by their surface-active properties.
Publication date :
2006
Journal title :
Archives of Microbiology
ISSN :
0302-8933
eISSN :
1432-072X
Publisher :
Springer, Germany
Volume :
186
Issue :
6
Pages :
475-83
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 28 January 2015

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