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Root development is maintained by specific bacteria-bacteria interactions within a complex microbiome

View ORCID ProfileOmri M. Finkel, View ORCID ProfileIsai Salas-González, View ORCID ProfileGabriel Castrillo, Theresa F. Law, View ORCID ProfileJonathan M. Conway, View ORCID ProfilePaulo José Pereira Lima Teixeira, View ORCID ProfileCorbin D. Jones, View ORCID ProfileJeffery L. Dangl
doi: https://doi.org/10.1101/645655
Omri M. Finkel
1Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
2Howard Hughes Medical Institute, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
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  • ORCID record for Omri M. Finkel
Isai Salas-González
1Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
2Howard Hughes Medical Institute, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
3Curriculum in Bioinformatics and Computational Biology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
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Gabriel Castrillo
1Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
2Howard Hughes Medical Institute, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
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Theresa F. Law
1Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
2Howard Hughes Medical Institute, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
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Jonathan M. Conway
1Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
2Howard Hughes Medical Institute, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
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Paulo José Pereira Lima Teixeira
1Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
2Howard Hughes Medical Institute, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
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Corbin D. Jones
1Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
3Curriculum in Bioinformatics and Computational Biology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
4Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
5Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
6Carolina Center for Genome Sciences, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
7Curriculum in Genetics and Molecular Biology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
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Jeffery L. Dangl
1Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
2Howard Hughes Medical Institute, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
3Curriculum in Bioinformatics and Computational Biology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
6Carolina Center for Genome Sciences, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
7Curriculum in Genetics and Molecular Biology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
8Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
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  • ORCID record for Jeffery L. Dangl
  • For correspondence: dangl@email.unc.edu
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Abstract

Plants grow within a complex web of species interacting with each other and with the plant via a wide repertoire of chemical signals. To model plant-microbe-microbe-environment interactions, we inoculated seedlings with a defined 185-member bacterial synthetic community (SynCom), and manipulated the abiotic environment to enable classification of the SynCom to modules of co-occurring strains. We deconstructed the SynCom based on these modules, identifying a single bacterial genus, Variovorax, which reverts phenotypic effects on root development induced by a wide diversity of bacterial strains and by the entire 185-member community. Variovorax use mechanisms related to auxin and ethylene manipulation to balance this ecologically realistic root community’s effects on root development. We demonstrate metabolic signal interference within a complex model community, defining Variovorax as determinants of bacteria-plant communication networks.

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The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY 4.0 International license.
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Posted June 04, 2019.
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Root development is maintained by specific bacteria-bacteria interactions within a complex microbiome
Omri M. Finkel, Isai Salas-González, Gabriel Castrillo, Theresa F. Law, Jonathan M. Conway, Paulo José Pereira Lima Teixeira, Corbin D. Jones, Jeffery L. Dangl
bioRxiv 645655; doi: https://doi.org/10.1101/645655
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Root development is maintained by specific bacteria-bacteria interactions within a complex microbiome
Omri M. Finkel, Isai Salas-González, Gabriel Castrillo, Theresa F. Law, Jonathan M. Conway, Paulo José Pereira Lima Teixeira, Corbin D. Jones, Jeffery L. Dangl
bioRxiv 645655; doi: https://doi.org/10.1101/645655

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