Arabidopsis thaliana and Pseudomonas Pathogens Exhibit Stable Associations over 
Evolutionary Timescales

Karasov, TL; Almario, J; Friedemann, C; Ding, W; Giolai, M; Heavens, D; Kersten, S; Lundberg, DS; Neumann, M; Regalado, J; Neher, RA; Kemen, E; Weigel, D

doi:10.1016/j.chom.2018.06.011

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Arabidopsis thaliana and Pseudomonas Pathogens Exhibit Stable Associations over Evolutionary Timescales

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Karasov, TL
Department Molecular Biology, Max Planck Institute for Developmental Biology, Max Planck Society;

/persons/resource/persons273623

Friedemann, C
Department Molecular Biology, Max Planck Institute for Developmental Biology, Max Planck Society;

/persons/resource/persons273205

Ding, W
Department Molecular Biology, Max Planck Institute for Developmental Biology, Max Planck Society;

/persons/resource/persons273625

Giolai, M
Department Molecular Biology, Max Planck Institute for Developmental Biology, Max Planck Society;

/persons/resource/persons272912

Kersten, S
Department Molecular Biology, Max Planck Institute for Developmental Biology, Max Planck Society;

/persons/resource/persons271592

Lundberg, DS
Department Molecular Biology, Max Planck Institute for Developmental Biology, Max Planck Society;

/persons/resource/persons271702

Neumann, M
Department Molecular Biology, Max Planck Institute for Developmental Biology, Max Planck Society;

/persons/resource/persons272828

Regalado, J
Department Molecular Biology, Max Planck Institute for Developmental Biology, Max Planck Society;

/persons/resource/persons85266

Weigel, D
Department Molecular Biology, Max Planck Institute for Developmental Biology, Max Planck Society;

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Citation

Karasov, T., Almario, J., Friedemann, C., Ding, W., Giolai, M., Heavens, D., et al. (2018). Arabidopsis thaliana and Pseudomonas Pathogens Exhibit Stable Associations over Evolutionary Timescales. Cell Host & Microbe, 24(1), 168-179. doi:10.1016/j.chom.2018.06.011.

Cite as: https://hdl.handle.net/21.11116/0000-0003-B697-5

Abstract

Crop disease outbreaks are often associated with clonal expansions of single pathogenic lineages. To determine whether similar boom-and-bust scenarios hold for wild pathosystems, we carried out a multi-year, multi-site survey of Pseudomonas in its natural host Arabidopsis thaliana. The most common Pseudomonas lineage corresponded to a ubiquitous pathogenic clade. Sequencing of 1,524 genomes revealed this lineage to have diversified approximately 300,000 years ago, containing dozens of genetically identifiable pathogenic sublineages. There is differentiation at the level of both gene content and disease phenotype, although the differentiation may not provide fitness advantages to specific sublineages. The coexistence of sublineages indicates that in contrast to crop systems, no single strain has been able to overtake the studied A. thaliana populations in the recent past. Our results suggest that selective pressures acting on a plant pathogen in wild hosts are likely to be much more complex than those in agricultural systems.