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The presumably North American species Plasmopara wilsonii is present in Germany on the ornamental plant Geranium phaeum

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Abstract

Geranium phaeum is a popular ornamental plant in Europe. Downy mildew disease caused by Plasmopara was found on this plant once 50 years ago in Poland, but at that time attributed to the native species, Plasmopara pusilla. Here we report the recurrence of downy mildew disease on G. phaeum in Germany. Molecular phylogenetic analysis and morphological investigations revealed that the causal agent of the new outbreak is P. wilsonii, but not P. pusilla. Plasmopara wilsonii had previously been found only in the USA and Korea on various hosts of Geranium. The presence of P. wilsonii on G. phaeum in Europe should be closely monitored, as downy mildew caused by this species probably has the potential to become an important emerging disease on its ornamental host, especially, as also the native G. molle is able to sustain the pathogen.

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Acknowledgments

This study was supported by the LOEWE excellence program of the German state of Hessen, in the framework of the Integrative Fungal Research Cluster (IPF). YJC was supported by a fellowship from the Alexander von Humboldt foundation.

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Authors and Affiliations

  1. Faculty of Biosciences, Institute of Ecology, Evolution and Diversity, Goethe University Frankfurt am Main, Max-von-Laue-Str. 9, D-60438, Frankfurt am Main, Germany

    Julia Kruse, Marco Thines & Young-Joon Choi

  2. Biodiversity and Climate Research Centre (BiK-F), Senckenberg Gesellschaft für Naturforschung, Senckenberganlage 25, D-60325, Frankfurt am Main, Germany

    Julia Kruse, Marco Thines & Young-Joon Choi

  3. Integrative Fungal Research Cluster (IPF), Georg-Voigt-Str. 14-16, D-60325, Frankfurt am Main, Germany

    Marco Thines

  4. Department of Biology, College of Natural Sciences, Kunsan National University, Gunsan, 54150, South Korea

    Young-Joon Choi

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  1. Julia Kruse
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  2. Marco Thines
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  3. Young-Joon Choi
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Correspondence to Young-Joon Choi.

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Kruse, J., Thines, M. & Choi, YJ. The presumably North American species Plasmopara wilsonii is present in Germany on the ornamental plant Geranium phaeum . Eur J Plant Pathol 145, 999–1005 (2016). https://doi.org/10.1007/s10658-016-0885-y

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  • DOI: https://doi.org/10.1007/s10658-016-0885-y

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