@ARTICLE{TreeBASE2Ref30402, author = {Mascha Hoffmeister}, title = {Peronospora choii sp. nov. and P. salviae-pratensis sp. nov., two new downy mildews of the Peronospora belbahrii species complex revealed by morphological and multi-gene phylogenetic analyses}, year = {2020}, keywords = {Lamiaceae, Peronospora belbahrii species complex, Peronospora choii sp. nov., Peronospora glechomae, Peronospora salviae-officinalis, Peronospora salviae-pratensis sp. nov., Salvia pratensis, Salvia sclarea}, doi = {}, url = {http://}, pmid = {}, journal = {FUSE}, volume = {}, number = {}, pages = {}, abstract = {The downy mildew species parasitic to Mentheae are of particular interest, as this tribe of Lamiaceae contains a variety of important medicinal plants and culinary herbs. Over the past two decades, two pathogens, Peronospora belbahrii and Pe. salviae-officinalis have spread globally, impacting basil and common sage production, respectively. In the original description of Pe. belbahrii, also the downy mildew of coleus (Plectranthus scutellarioides) was preliminarily ascribed to this species/taxon in the broader sense, as morphological similarities between basil and coleus downy mildew were high and only two genes were used in the phylogenies. Considering the often very high host specificity of Peronospora, it seemed, possible that with the availability of more data the downy mildew pathogen on coleus would need to be assigned to a species of its own. In this study, Peronospora species causing downy mildew on members of the Mentheae, including clary sage (Salvia sclarea), meadow sage (S. pratensis), basil (Ocimum basilicum), ground ivy (Glechoma hederacea) and coleus (Plectranthus scutellarioides) were studied using light microscopy and molecular phylogenetic analyses based on six loci (ITS rDNA, cox1, cox2, ef1a, hsp90 and β-tubulin) to clarify the species boundaries in the Pe. belbahrii species complex. The downy mildew on Salvia pratensis is shown to be distinct from Pe. salviae-officinalis and closely related to Pe. glechomae, and is herein described as a new taxon, Pe. salviae-pratensis. The downy mildew on S. sclarea was found to be caused by Pe. salviae-officinalis. This is of phytopathological importance, because meadow sage thus does not play a role as inoculum source for common sage in the natural habitat of the former in Europe and Asia, while clary sage probably does. The multi-gene phylogeny revealed that the causal agent of downy mildew on coleus is distinct from Pe. belbahrii on basil, and is herein described as a new taxon, Pe. choii.} }

• Go to search
• Citation
• Taxa
• Matrices
• Trees
• Analyses
• 

CiteULike

Delicious

Connotea