Obligate cross-feeding expands the metabolic niche of bacteria
Obligate cross-feeding expands the metabolic niche of bacteria
Abstract Bacteria frequently engage in obligate metabolic mutualisms with other microorganisms. However, it remains generally unclear how the resulting metabolic dependencies affect the ecological niche space accessible to the whole consortium relative to the niche space available to its constituent individuals. Here we address this issue by systematically cultivating metabolically dependent strains of different bacterial species either individually or as pairwise coculture in a wide range of carbon sources. Our results show that obligate cross-feeding is significantly more likely to expand the metabolic niche space of interacting bacterial populations than to contract it. Moreover, niche expansion occurred predominantly between two specialist taxa and correlated positively with the phylogenetic distance between interaction partners. Together, our results demonstrate that obligate cross-feeding can significantly expand the ecological niche space of interacting bacterial genotypes, thus explaining the widespread occurrence of this type of ecological interaction in natural microbiomes.
Avermann Neele、Kost Christian、Thormann Kai M.、Giri Samir、Kreienbaum Maximilian、O?a Leonardo
Department of Ecology, School of Biology/Chemistry, University of Osnabr¨1ckDepartment of Ecology, School of Biology/Chemistry, University of Osnabr¨1ck||Experimental Ecology and Evolution Research Group, Department of Bioorganic Chemistry, Max Planck Institute for Chemical EcologyDepartment of Microbiology and Molecular Biology, Justus-Liebig-Universit?t Gie?enDepartment of Ecology, School of Biology/Chemistry, University of Osnabr¨1ck||Experimental Ecology and Evolution Research Group, Department of Bioorganic Chemistry, Max Planck Institute for Chemical EcologyDepartment of Microbiology and Molecular Biology, Justus-Liebig-Universit?t Gie?enDepartment of Ecology, School of Biology/Chemistry, University of Osnabr¨1ck
微生物学分子生物学生物科学现状、生物科学发展
Auxotrophybyproduct interactioncross-feedingecological nichefacilitationniche overlapniche expansionpublic good
Avermann Neele,Kost Christian,Thormann Kai M.,Giri Samir,Kreienbaum Maximilian,O?a Leonardo.Obligate cross-feeding expands the metabolic niche of bacteria[EB/OL].(2025-03-28)[2025-08-02].https://www.biorxiv.org/content/10.1101/2020.11.04.368415.点此复制
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