Confirmation of <Emphasis Type="Italic">Peronospora agrimoniae</Emphasis> as a distinct species |
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| Authors: | Irena Petr?elová Young-Joon Choi Michaela Jemelková Ivana Dole?alová Julia Kruse Marco Thines Miloslav Kitner |
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| Institution: | 1.Centre of the Region Haná for Biotechnological and Agricultural Research, Section of Applied Research of Vegetables and Special Crops of the Crop Research Institute, Department of Genetic Resources for Vegetables, Medicinal and Special Plants,Olomouc-Holice,Czech Republic;2.Biodiversity and Climate Research Centre (BiK-F) at the Senckenberg Gesellschaft für Naturforschung,Frankfurt am Main,Germany;3.Department of Biological Sciences, Institute of Ecology, Evolution and Diversity,Goethe University Frankfurt am Main,Frankfurt am Main,Germany;4.Department of Biology,Kunsan National University,Gunsan,Korea;5.Integrative Fungal Research Cluster (IPF),Frankfurt am Main,Germany;6.Faculty of Science, Department of Botany,Palacky University in Olomouc,Olomouc,Czech Republic |
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| Abstract: | Leaves with typical symptoms of downy mildew were found on common agrimony in the Czech Republic in 2014 and 2015 and at several locations in Germany from 2010 to 2014. The causal agent of downy mildew of agrimony was often reported as Peronospora agrimoniae, but sometimes also as P. sparsa. Morphological characteristics of the pathogens found in both countries are in the range of previous works for P. agrimoniae, but also other downy mildews parasitic on Rosaceae, rendering their discrimination based on published observations difficult. For molecular identification sequencing of several loci (nrITS rDNA, cox1 and cox2) was performed. Phylogenetic analyses based on nrITS rDNA clearly separated P. agrimoniae from other Peronospora species infecting Rosaceae. Thus, considering P. agrimoniae as separate species seems justified. Two German specimens were identical to two Czech samples in both nrITS rDNA and cox1 mtDNA sequences, but differed in a single nucleotide substitution in cox2 region. To our knowledge, this is the first verified record of P. agrimoniae on common agrimony in the Czech Republic. |
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