Basidiophora delawarensis, a new downy mildew species infecting cultivated goldenrod (Solidago sphacelata) in the USA
| Autor: | Nancy F. Gregory, Catalina Salgado-Salazar, Jo Anne Crouch, Emma C. Wallace |
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| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Symphyotrichum biology Erigeron Peronosporales Sporangium food and beverages 030108 mycology & parasitology Asteraceae biology.organism_classification Agricultural and Biological Sciences (miscellaneous) 03 medical and health sciences 030104 developmental biology Genus Botany Ornamental plant Downy mildew Ecology Evolution Behavior and Systematics |
| Zdroj: | Mycological Progress. 17:1283-1291 |
| ISSN: | 1861-8952 1617-416X |
| Popis: | Species in the genus Basidiophora (Oomycota, Peronosporales) are pathogens causing downy mildew disease on several closely related plant hosts in the family Asteraceae, including the genera Conyza, Erigeron, Solidago, and Symphyotrichum. Despite their widespread occurrence, little is known about the diversity, biology, and economic impact of downy mildew pathogens of ornamental or wild plants in the Asteraceae. In June 2017, Solidago sphacelata plants of the cultivar ‘Golden Fleece’ were found in the state of Delaware, USA, showing typical symptoms of downy mildew disease. Initial morphological observations indicated the specimen belonged to the genus Basidiophora. Phylogenetic analysis of a sequence matrix of the partial cox2 mitochondrial gene using Bayesian and maximum likelihood methods showed that the Basidiophora isolate from S. sphacelata represents an undescribed species that is here described as B. delawarensis. This new species constitutes the third accepted species in the genus Basidiophora and can be distinguished from other Basidiophora species by differences in size of sporangia and sporangiophores and nucleotide sequence divergence. This new species poses a potential threat to its host, warranting close monitoring and the implementation of disease management programs. |
| Databáze: | OpenAIRE |
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