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Resource availability drives bacteria community resistance to pathogen invasion via altering bacterial pairwise interactions

Abstract : Microbial interactions within resident communities are a major determinant of resistance to pathogen invasion. Yet, interactions vary with environmental conditions, raising the question of how community composition and environments interactively shape invasion resistance. Here we use Resource Availability (RA) as model parameter altering resistance of model bacterial communities to invasion by the plant pathogenic bacterium Ralstonia solanacearum. We found that at high RA, interactions between resident bacterial species were mainly driven by the direct antagonism, in terms of the means of invader inhibition. Consequently, the competitive resident communities with a higher production of antibacterial were invaded to a lesser degree than facilitative communities. At low RA, bacteria produced little direct antagonist potential, but facilitative communities reached a relatively higher community productivity, which showed higher resistance to pathogen invasion than competitive communities with lower productivities. This framework may lay the basis to understand complex microbial interactions and biological invasion as modulated by the dynamic changes of environmental resource availability.
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https://hal.archives-ouvertes.fr/hal-03776248
Contributor : Laurent Jonchère Connect in order to contact the contributor
Submitted on : Tuesday, September 20, 2022 - 4:36:09 PM
Last modification on : Saturday, November 19, 2022 - 7:47:11 PM

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Distributed under a Creative Commons Attribution 4.0 International License

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Mei Li, Thomas Pommier, Yue Yin, Wenhui Cao, Xiaohui Zhang, et al.. Resource availability drives bacteria community resistance to pathogen invasion via altering bacterial pairwise interactions. Environmental Microbiology, 2022, ⟨10.1111/1462-2920.16184⟩. ⟨hal-03776248⟩

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