Parallels between experimental and natural evolution of legume symbionts

Camille Clerissi, Marie Touchon, Delphine Capela, Mingxing Tang, Stéphane Cruveiller, Clémence Genthon, Céline Lopez-Roques, Matthew A. Parker, Lionel Moulin, Catherine Masson-Boivin () and Eduardo P. C. Rocha ()
Additional contact information
Camille Clerissi: Institut Pasteur
Marie Touchon: Institut Pasteur
Delphine Capela: CNRS
Mingxing Tang: CNRS
Stéphane Cruveiller: Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Université d’Evry, Université Paris-Saclay
Clémence Genthon: INRA, US 1426, GeT-PlaGe
Céline Lopez-Roques: INRA, US 1426, GeT-PlaGe
Matthew A. Parker: State University of New York
Lionel Moulin: IPME
Catherine Masson-Boivin: CNRS
Eduardo P. C. Rocha: Institut Pasteur

Nature Communications, 2018, vol. 9, issue 1, 1-13

Abstract: 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. Here we compare 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 genetic diversification dominated by purifying selection. We observe no adaptation in the plasmid carrying the genes responsible for the ecological transition. Instead, adaptation was associated with positive selection in a set of genes that led to the co-option of the same quorum-sensing system in both processes. Our results provide evidence for similarities in experimental and natural evolutionary transitions and highlight the potential of comparisons between both processes to understand symbiogenesis.

Date: 2018
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-04778-5

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DOI: 10.1038/s41467-018-04778-5

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