Mycobiology

The Korean Society of Mycology (한국균학회)
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Plasmopara elegantissima sp. nov. (Oomycota, Peronosporales), a Downy Mildew Species Specialized to Impatiens textori (Balsaminaceae)

  • Choi, Young-Joon (College of Natural Sciences, Department of Biology, Kunsan National University) ;
  • Gorg, Marlena (Department for Biological Sciences, Institute of Ecology, Evolution and Diversity, Goethe University Frankfurt am Main) ;
  • Shin, Hyeon-Dong (Division of Environmental Science and Ecological Engineering, Korea University) ;
  • Thines, Marco (Department for Biological Sciences, Institute of Ecology, Evolution and Diversity, Goethe University Frankfurt am Main)
  • Received : 2020.02.20
  • Accepted : 2020.05.03
  • Published : 2020.08.31
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Abstract

Over the past 15 years, downy mildew became the most destructive foliar disease in cultivated Impatiens species (Balsaminaceae) worldwide. A previous study had revealed that the causal agent was not Plasmopara obducens (Oomycota, Peronosporales) but Plasmopara destructor on Impatiens walleriana, and Plasmopara velutina on Impatiens balsamina. This hints to a relatively high degree of specialization of Plasmopara on Balsaminaceae. Therefore, it was the aim of the present study to perform multigene phylogenetic analysis and detailed morphological investigation for several Korean downy mildew samples parasitic to cultivated I. walleriana, and I. balsamina, but also to a northeast Asian wild plant, Impatiens textori. It was revealed that I. textori harbors a new species, which is introduced and described here as Plasmopara elegantissima.

Keywords

References

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