Toxicity drives facilitation between 4 bacterial species.

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State: Public
Version: Final published version
License: CC BY 4.0
Serval ID
serval:BIB_4DBE2FE67F1B
Type
Article: article from journal or magazin.
Collection
Publications
Title
Toxicity drives facilitation between 4 bacterial species.
Journal
Proceedings of the National Academy of Sciences of the United States of America
Author(s)
Piccardi P., Vessman B., Mitri S.
ISSN
1091-6490 (Electronic)
ISSN-L
0027-8424
Publication state
Published
Issued date
06/08/2019
Peer-reviewed
Oui
Volume
116
Number
32
Pages
15979-15984
Language
english
Notes
Publication types: Journal Article
Publication Status: ppublish
Abstract
Competition between microbes is extremely common, with many investing in mechanisms to harm other strains and species. Yet positive interactions between species have also been documented. What makes species help or harm each other is currently unclear. Here, we studied the interactions between 4 bacterial species capable of degrading metal working fluids (MWF), an industrial coolant and lubricant, which contains growth substrates as well as toxic biocides. We were surprised to find only positive or neutral interactions between the 4 species. Using mathematical modeling and further experiments, we show that positive interactions in this community were likely due to the toxicity of MWF, whereby each species' detoxification benefited the others by facilitating their survival, such that they could grow and degrade MWF better when together. The addition of nutrients, the reduction of toxicity, or the addition of more species instead resulted in competitive behavior. Our work provides support to the stress gradient hypothesis by showing how harsh, toxic environments can strongly favor facilitation between microbial species and mask underlying competitive interactions.
Keywords
community function, competition, cooperation, species diversity, stress gradient hypothesis
Pubmed
Web of science
Open Access
Yes
Funding(s)
European Research Council (ERC)
University of Lausanne
Create date
21/07/2019 16:24
Last modification date
23/08/2019 6:08
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