Oxidative stress changes interactions between 2 bacterial species from competitive to facilitative.

Details

Ressource 1Download: onlineVersion.pdf (1825.47 [Ko])
State: Public
Version: Final published version
License: CC BY 4.0
Serval ID
serval:BIB_D03B97DAF06F
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Oxidative stress changes interactions between 2 bacterial species from competitive to facilitative.
Journal
PLoS biology
Author(s)
Di Martino R., Picot A., Mitri S.
ISSN
1545-7885 (Electronic)
ISSN-L
1544-9173
Publication state
Published
Issued date
02/2024
Peer-reviewed
Oui
Volume
22
Number
2
Pages
e3002482
Language
english
Notes
Publication types: Journal Article
Publication Status: epublish
Abstract
Knowing how species interact within microbial communities is crucial to predicting and controlling community dynamics, but interactions can depend on environmental conditions. The stress-gradient hypothesis (SGH) predicts that species are more likely to facilitate each other in harsher environments. Even if the SGH gives some intuition, quantitative modeling of the context-dependency of interactions requires understanding the mechanisms behind the SGH. In this study, we show with both experiments and a theoretical analysis that varying the concentration of a single compound, linoleic acid (LA), modifies the interaction between 2 bacterial species, Agrobacterium tumefaciens and Comamonas testosteroni, from competitive at a low concentration, to facilitative at higher concentrations where LA becomes toxic for one of the 2 species. We demonstrate that the mechanism behind facilitation is that one species is able to reduce reactive oxygen species (ROS) that are produced spontaneously at higher concentrations of LA, allowing for short-term rescue of the species that is sensitive to ROS and longer coexistence in serial transfers. In our system, competition and facilitation between species can occur simultaneously, and changing the concentration of a single compound can alter the balance between the two.
Keywords
Ecosystem, Reactive Oxygen Species, Oxidative Stress
Pubmed
Web of science
Open Access
Yes
Create date
09/02/2024 14:07
Last modification date
09/08/2024 15:52
Usage data