AHL signaling molecules with a large acyl chain enhance biofilm formation on sulfur and metal sulfides by the bioleaching bacterium Acidithiobacillus ferrooxidans
Author
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González, Alex
Author
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Bellenberg, Sören
es_CL
Author
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Mamani, Sigde
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Author
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Ruiz, Lina
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Author
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Echeverría, Alex
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Author
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Soulère, Laurent
es_CL
Author
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Doutheau, Alain
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Author
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Demergasso, Cecilia
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Author
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Sand, Wolfgang
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Author
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Queneau, Yves
es_CL
Author
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Vera, Mario
es_CL
Author
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Guiliani Guerin, Nicolás
es_CL
Admission date
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2014-01-27T15:43:54Z
Available date
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2014-01-27T15:43:54Z
Publication date
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2013-04
Cita de ítem
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Appl Microbiol Biotechnol (2013) 97:3729–3737
en_US
Identifier
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doi: 10.1007/s00253-012-4229-3
Identifier
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https://repositorio.uchile.cl/handle/2250/119711
General note
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Artículo de publicación ISI.
en_US
Abstract
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Biofilm formation plays a pivotal role in bioleaching activities of bacteria in both industrial and natural environments. Here, by visualizing attached bacterial cells on energetic substrates with different microscopy techniques, we obtained the first direct evidence that it is possible to positively modulate biofilm formation of the extremophilic bacterium Acidithiobacillus ferrooxidans on sulfur and pyrite surfaces by using Quorum Sensing molecules of the N-acylhomoserine lactone type (AHLs). Our results revealed that AHL-signaling molecules with a long acyl chain (12 or 14 carbons) increased the adhesion of A. ferrooxidans cells to these substrates. In addition, Card-Fish experiments demonstrated that C14-AHL improved the adhesion of indigenous A. ferrooxidans cells from a mixed bioleaching community to pyrite. Finally, we demonstrated that this improvement of cell adhesion is correlated with an increased production of extracellular polymeric substances. Our results open up a promising means to develop new strategies for the improvement of bioleaching efficiency and metal recovery, which could also be used to control environmental damage caused by acid mine/rock drainage.
en_US
Patrocinador
dc.description.sponsorship
FONDECYT
1080441, FONDECYT 1120295, and CNRS-CONICYT (PICS no.
5270). Alex González was supported by scholarships from CONICYT.
Sören Bellenberg and Mario Vera acknowledge the financial support of
the program of promotion of Young Scientists from University of
Duisburg-Essen.
AHL signaling molecules with a large acyl chain enhance biofilm formation on sulfur and metal sulfides by the bioleaching bacterium Acidithiobacillus ferrooxidans