Revision of Plasmopara (Oomycota, Peronosporales) parasitic to Impatiens

Gorg, Marlena and Ploch, Sebastian and Kruse, Julia and Kummer, Volker and Runge, Fabian and Choi, Young-Joon and Thines, Marco (2017) Revision of Plasmopara (Oomycota, Peronosporales) parasitic to Impatiens. Mycological Progress, 16 (8). pp. 791-799. ISSN 1617-416X


The oomycete Plasmopara obducens was first described on wild Impatiens noli-tangere in Germany in 1877. About 125 years later the first occurrence of P. obducens on cultivated I. walleriana in the United Kingdom was reported, and a worldwide epidemic followed. Although this pathogen is a major threat for ornamental busy lizzy, the identity of the pathogen remained unconfirmed and the high host specificity observed for the genus Plasmopara cast doubts regarding its determination as P. obducens. In this study, using multigene phylogenies and morphological investigation, it is revealed that P. obducens on I. noli-tangere is not the conspecific with the pathogen affecting I. walleriana and another ornamental balsam, I. balsamina. As a consequence, the new names P. destructor and P. velutina are introduced for the pathogens of I. walleriana and I. balsamina, respectively.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: Current - USQ Other
Faculty/School / Institute/Centre: Current - USQ Other
Date Deposited: 26 Nov 2019 05:28
Last Modified: 03 Jan 2020 01:34
Uncontrolled Keywords: Busy lizzy; Downy mildew; Horticulture; Lady slipper balsam; New species; Peronosporaceae; Taxonomy; Touch-me-not
Fields of Research (2008): 06 Biological Sciences > 0605 Microbiology > 060505 Mycology
Fields of Research (2020): 31 BIOLOGICAL SCIENCES > 3107 Microbiology > 310705 Mycology
Identification Number or DOI: doi:10.1007%2Fs11557-017-1316-y

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