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  Recombination of virulence genes in divergent acidovorax avenae strains that infect a common host

Zeng, Q., Wang, J., Bertels, F., Giordano, P. R., Chilvers, M. I., Huntley, R. B., et al. (2017). Recombination of virulence genes in divergent acidovorax avenae strains that infect a common host. Molecular Plant-Microbe Interactions, 30(10), 813-828. doi:10.1094/MPMI-06-17-0151-R.

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Zeng, Quan, Autor
Wang, Jie, Autor
Bertels, Frederic1, Autor           
Giordano, Paul R., Autor
Chilvers, Martin I., Autor
Huntley, Regan B., Autor
Vargas, Joseph M., Autor
Sundin, George W., Autor
Jacobs, Janette L., Autor
Yang, Ching-Hong, Autor
Affiliations:
1Department Evolutionary Theory, Max Planck Institute for Evolutionary Biology, Max Planck Society, ou_1445641              

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 Zusammenfassung: Bacterial etiolation and decline (BED), caused by Acidovorax avenae, is an emerging disease of creeping bentgrass on golf courses in the United States. We performed the first comprehensive analysis of A. avenae on a nationwide collection of turfgrass- and maize-pathogenic A. avenae. Surprisingly, our results reveal that the turfgrass-pathogenic A. avenae in North America are not only highly divergent but also belong to two distinct phylogroups. Both phylogroups specifically infect turfgrass but are more closely related to maize pathogens than to each other. This suggests that, although the disease is only recently reported, it has likely been infecting turfgrass for a long time. To identify a genetic basis for the host specificity, we searched for genes closely related among turfgrass strains but distantly related to their homologs from maize strains. We found a cluster of 11 such genes generated by three ancient recombination events within the type III secretion system (T3SS) pathogenicity island. Ever since the recombination, the cluster has been conserved by strong purifying selection, hinting at its selective importance. Together our analyses suggest that BED is an ancient disease that may owe its host specificity to a highly conserved cluster of 11 T3SS genes. © 2017 The American Phytopathological Society.

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Sprache(n): eng - English
 Datum: 2017
 Publikationsstatus: Erschienen
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 Ort, Verlag, Ausgabe: -
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 Art der Begutachtung: -
 Identifikatoren: DOI: 10.1094/MPMI-06-17-0151-R
BibTex Citekey: Zeng2017813
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Titel: Molecular Plant-Microbe Interactions
Genre der Quelle: Zeitschrift
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Affiliations:
Ort, Verlag, Ausgabe: St. Paul, MN : APS Press
Seiten: - Band / Heft: 30 (10) Artikelnummer: - Start- / Endseite: 813 - 828 Identifikator: ISSN: 0894-0282
CoNE: https://pure.mpg.de/cone/journals/resource/954925558505