Abstract
For diagnostics and control of emerging plant diseases, accurate species determination of the causal pathogens is a prerequisite. Downy mildew disease, caused by an unknown species of Peronospora, has speedily spread throughout numerous gardens and nurseries of the ornamental plant Aquilegia in the UK, but so far does not seem to have reached continental Europe. Apart from cultivated Aquilegia, downy mildew from wild columbines has only been reported from East Asia, where natural populations of Semiaquilegia are affected by downy mildew. To resolve the phylogenetic relationships of the causal pathogens on Aquilegia and Semiaquilegia, a phylogeny based on nine loci was performed. In addition, detailed morphological comparisons were carried out to determine if the downy mildew agents on Aquilegia and Semiaquilegia are conspecific and can be discriminated from related downy mildew species. Strong evidence was found that the downy mildew pathogens on Aquilegia and Semiaquilegia are conspecific, but distinct from other species of Peronospora affecting Ranunculaceae, Papaveraceae, and Saxifragaceae. Thus, a new species, Peronospora aquilegiicola, is introduced. The quick spread of the pathogen throughout the UK and the current absence from continental Europe highlights the importance to consider quarantine measures to restrict the further spread of this pathogen.
| Original language | English |
|---|---|
| Journal | European Journal of Plant Pathology |
| DOIs | |
| Publication status | Published - 2019 Jan 1 |
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Keywords
- Aquilegia
- Downy mildew
- Multi-locus phylogeny
- Quarantine
- Semiaquilegia
ASJC Scopus subject areas
- Agronomy and Crop Science
- Plant Science
- Horticulture
Cite this
Peronospora aquilegiicola sp. nov., the downy mildew affecting columbines in the UK is an invasive species from East Asia. / Thines, Marco; Denton, Geoffrey J.; Beal, Elizabeth J.; Kilty, Anne; Denton, Jennifer O.; Shin, Hyeon-Dong; Choi, Young Joon.
In: European Journal of Plant Pathology, 01.01.2019.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Peronospora aquilegiicola sp. nov., the downy mildew affecting columbines in the UK is an invasive species from East Asia
AU - Thines, Marco
AU - Denton, Geoffrey J.
AU - Beal, Elizabeth J.
AU - Kilty, Anne
AU - Denton, Jennifer O.
AU - Shin, Hyeon-Dong
AU - Choi, Young Joon
PY - 2019/1/1
Y1 - 2019/1/1
N2 - For diagnostics and control of emerging plant diseases, accurate species determination of the causal pathogens is a prerequisite. Downy mildew disease, caused by an unknown species of Peronospora, has speedily spread throughout numerous gardens and nurseries of the ornamental plant Aquilegia in the UK, but so far does not seem to have reached continental Europe. Apart from cultivated Aquilegia, downy mildew from wild columbines has only been reported from East Asia, where natural populations of Semiaquilegia are affected by downy mildew. To resolve the phylogenetic relationships of the causal pathogens on Aquilegia and Semiaquilegia, a phylogeny based on nine loci was performed. In addition, detailed morphological comparisons were carried out to determine if the downy mildew agents on Aquilegia and Semiaquilegia are conspecific and can be discriminated from related downy mildew species. Strong evidence was found that the downy mildew pathogens on Aquilegia and Semiaquilegia are conspecific, but distinct from other species of Peronospora affecting Ranunculaceae, Papaveraceae, and Saxifragaceae. Thus, a new species, Peronospora aquilegiicola, is introduced. The quick spread of the pathogen throughout the UK and the current absence from continental Europe highlights the importance to consider quarantine measures to restrict the further spread of this pathogen.
AB - For diagnostics and control of emerging plant diseases, accurate species determination of the causal pathogens is a prerequisite. Downy mildew disease, caused by an unknown species of Peronospora, has speedily spread throughout numerous gardens and nurseries of the ornamental plant Aquilegia in the UK, but so far does not seem to have reached continental Europe. Apart from cultivated Aquilegia, downy mildew from wild columbines has only been reported from East Asia, where natural populations of Semiaquilegia are affected by downy mildew. To resolve the phylogenetic relationships of the causal pathogens on Aquilegia and Semiaquilegia, a phylogeny based on nine loci was performed. In addition, detailed morphological comparisons were carried out to determine if the downy mildew agents on Aquilegia and Semiaquilegia are conspecific and can be discriminated from related downy mildew species. Strong evidence was found that the downy mildew pathogens on Aquilegia and Semiaquilegia are conspecific, but distinct from other species of Peronospora affecting Ranunculaceae, Papaveraceae, and Saxifragaceae. Thus, a new species, Peronospora aquilegiicola, is introduced. The quick spread of the pathogen throughout the UK and the current absence from continental Europe highlights the importance to consider quarantine measures to restrict the further spread of this pathogen.
KW - Aquilegia
KW - Downy mildew
KW - Multi-locus phylogeny
KW - Quarantine
KW - Semiaquilegia
UR - http://www.scopus.com/inward/record.url?scp=85068323380&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85068323380&partnerID=8YFLogxK
U2 - 10.1007/s10658-019-01787-y
DO - 10.1007/s10658-019-01787-y
M3 - Article
JO - European Journal of Plant Pathology
JF - European Journal of Plant Pathology
SN - 0929-1873
ER -