Plasmopara elegantissima sp. nov. (Oomycota, Peronosporales), a Downy Mildew Species Specialized to Impatiens textori (Balsaminaceae)

Young Joon Choi, Marlena Görg, Hyeon Dong Shin, Marco Thines

    Research output: Contribution to journalArticlepeer-review

    6 Citations (Scopus)

    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.

    Original languageEnglish
    Pages (from-to)304-312
    Number of pages9
    JournalMycobiology
    DOIs
    Publication statusPublished - 2020

    Bibliographical note

    Funding Information:
    YJC was supported by National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning [2019R1C1C1002791] and National Institute of Biological Resources (NIBR) funded by of the Ministry of Environment (MOE), Republic of Korea. MT was supported by LOEWE in the framework of the excellence cluster for Integrative Fungal Research (IPF). YJC and HDS collected all downy mildew samples included in the present study.

    Publisher Copyright:
    © 2020, © 2020 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group on behalf of the Korean Society of Mycology.

    Keywords

    • Peronosporaceae
    • allopatric speciation
    • cox2 mtDNA
    • multi-locus phylogeny
    • taxonomy

    ASJC Scopus subject areas

    • Microbiology
    • Infectious Diseases

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