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Parallels between experimental and natural evolution of legume symbionts

Camille Clerissi, Marie Touchon, Delphine Capela, Mingxing Tang, Stephane Cruveiller, Matthew A. Parker, Lionel Moulin, Catherine Masson-Boivin, Eduardo P.C. Rocha
doi: https://doi.org/10.1101/250159
Camille Clerissi
Microbial Evolutionary Genomics, Institut Pasteur, Paris, France;
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Marie Touchon
Microbial Evolutionary Genomics, Institut Pasteur, Paris, France;
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Delphine Capela
LIPM, Universite de Toulouse, INRA, CNRS, Castanet-Tolosan, France;
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Mingxing Tang
LIPM, Universite de Toulouse, INRA, CNRS, Castanet-Tolosan, France;
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Stephane Cruveiller
CEA/FAR, Institut de Genomique, Evry, France;
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Matthew A. Parker
Department of Biological Sciences, State University of New York, Binghamton, NY;
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Lionel Moulin
IRD, Cirad, Universite de Montpellier, IPME, Montpellier, France
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Catherine Masson-Boivin
LIPM, Universite de Toulouse, INRA, CNRS, Castanet-Tolosan, France;
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Eduardo P.C. Rocha
Microbial Evolutionary Genomics, Institut Pasteur, Paris, France;
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  • For correspondence: erocha@pasteur.fr
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Abstract

The emergence of symbiotic interactions has been studied using population genomics in nature and experimental evolution in the laboratory, but the parallels between these processes remain unknown. We compared the emergence of rhizobia after the horizontal transfer of a symbiotic plasmid in natural populations of Cupriavidus taiwanensis, over 10 MY ago, with the experimental evolution of symbiotic Ralstonia solanacearum for a few hundred generations. In spite of major differences in terms of time-span, environment, genetic background and phenotypic achievement, both processes resulted in rapid diversification dominated by purifying selection concomitant with acquisition of positively selected mutations. The latter were lacking in the plasmid carrying the genes responsible for the ecological transition. Instead, adaptation targeted the same set of genes leading to the co-option of the same quorum-sensing system. Our results provide evidence for similarities in experimental and natural evolutionary transitions and highlight the potential of comparisons between both processes to understand symbiogenesis.

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Posted January 18, 2018.
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Parallels between experimental and natural evolution of legume symbionts
Camille Clerissi, Marie Touchon, Delphine Capela, Mingxing Tang, Stephane Cruveiller, Matthew A. Parker, Lionel Moulin, Catherine Masson-Boivin, Eduardo P.C. Rocha
bioRxiv 250159; doi: https://doi.org/10.1101/250159
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Parallels between experimental and natural evolution of legume symbionts
Camille Clerissi, Marie Touchon, Delphine Capela, Mingxing Tang, Stephane Cruveiller, Matthew A. Parker, Lionel Moulin, Catherine Masson-Boivin, Eduardo P.C. Rocha
bioRxiv 250159; doi: https://doi.org/10.1101/250159

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