| Autor: |
Bradshaw M; Department of Entomology and Plant Pathology, Center for Integrated Fungal Research, North Carolina State University, 851 Main Campus Drive, Raleigh, North Carolina 27606.; Department of Organismic and Evolutionary Biology, Farlow Herbarium, Harvard University, 22 Divinity Avenue, Cambridge, Massachusetts 02138., Braun U; Institute of Biology, Department of Geobotany and Botanical Garden, Herbarium, Martin Luther University, Kirchtor 21, Halle (Saale) 06099, Germany., Mitchell JK; Department of Organismic and Evolutionary Biology, Farlow Herbarium, Harvard University, 22 Divinity Avenue, Cambridge, Massachusetts 02138., Crouch U; Department of Entomology and Plant Pathology, Center for Integrated Fungal Research, North Carolina State University, 851 Main Campus Drive, Raleigh, North Carolina 27606., LaGreca S; Department of Entomology and Plant Pathology, Center for Integrated Fungal Research, North Carolina State University, 851 Main Campus Drive, Raleigh, North Carolina 27606., Pfister DH; Department of Organismic and Evolutionary Biology, Farlow Herbarium, Harvard University, 22 Divinity Avenue, Cambridge, Massachusetts 02138. |
| Abstrakt: |
This is the sixth contribution in a series devoted to the phylogeny and taxonomy of powdery mildews. This part includes our third treatment of the species of the genus Erysiphe . It continues the previous contribution on the phylogenetic-taxonomic assessment of the species belonging to the " Microsphaera lineage." Since this is a large lineage, we have split the treatment of the " Microsphaera lineage" into two parts. Phylogenetic trees based on rDNA are supplemented by sequences of additional markers ( CAM, GAPDH, GS, RPB2 , and TUB ). The " Erysiphe trifoliorum complex" is a challenging group that belongs to the " Microsphaera lineage." Adequate clarification of this complex will be possible when additional worldwide multilocus sequence analyses are performed. The new species Erysiphe acetosae, E. acmisponis, E. lathyrina, E. salmoniana , and E. santalicola are described, and the new combinations E. biuncinata and E. pavoniae are introduced. Specimens of several species have been sequenced for the first time, particularly North American species, such as Erysiphe caryae, E. ceanothi, E. juglandis-nigrae , and E. ravenelii. Erysiphe syringae is lectotypified and 15 species names are epitypified in order to provide ex-epitype reference sequences. For other species, non-ex-type reference sequences are proposed for phylogenetic-taxonomic purposes. Ex-type sequences for Erysiphe baptisiicola, E. sesbaniae, Microsphaera sydowiana, M. umbilici , and Oidium pavoniae have been retrieved. |
