Full TGIF Record # 230965
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DOI:10.1094/PHYTO-103-10-S4.1
Web URL(s):http://apsjournals.apsnet.org/doi/pdf/10.1094/PHYTO-103-10-S4.1
    Last checked: 10/8/2013
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Author(s):Beirn, L. A.; Tredway, L. P.; Boehm, M. J.; Orshinsky, A. M.; Putman, A. I.; Carbone, I.; Clarke, B. B.; Crouch, J.
Author Affiliation:Beirn and Clarke: Rutgers University, New Brunswick, NJ; Tredway: Syngenta Crop Protection, Greensboro, NC; Boehm: The Ohio State University, Columbus, OH; Orshinsky: Agri-Food Canada, Saskatchewan, Canada; Putman and Carbone: North Carolina State University, Raleigh, NC; Crouch: USDA-ARS Systematic Mycology & Microbiology Laboratory, Beltsville, MD
Title:Putting to rest a 75 year old controversy: The true taxonomic placement of the dollar spot pathogens of turfgrass
Section:2013 Potomac Division meeting abstracts
Other records with the "2013 Potomac Division meeting abstracts" Section
Meeting Info.:Shepherdstown, West Virginia: April 3-5, 2013
Source:Phytopathology. Vol. 103, No. 10S, October Supplement 2013, p. S4.1.
Publishing Information:St. Paul, Minnesota: American Phytopathological Society
# of Pages:1
Keywords:TIC Keywords: Classification; Disease profile; Dollar spot; Morphological evaluation; Taxonomy
Abstract/Contents:"Dollar spot is one of the most widespread and economically important diseases of amenity turfgrasses. Since the pathogen was first described as Sclerotinia homoeocarpa in 1937, the exact taxonomic placement of this fungus has been the subject of much debate. True Sclerotinia species produce apothecia from tuberoid sclerotia, a characteristic lacking in S. homoeocarpa. Morphological and rDNA sequence data has suggested that this fungus might be more appropriately placed in the Rutstroemiaceae family; however, additional data is needed to test this hypothesis. In the current study, we used morphological and molecular data to evaluate 85 isolates of the dollar spot fungus, including the original specimens used by Bennett to describe the species, and closely-related fungi in the Rutstroemiaceae (Ciboria, Lambertella, Lanzia, Poculum, Rutstroemia). ~4300 bp of sequence data were generated from eight markers: actin, β-tubulin, calmodulin, translation elongation factor 1 alpha, the internal transcribed spacer region (ITS), DNA replication factor Mcm7, the large subunit, and the small ribosomal RNA subunit. An additional ~200 bp fragment of the ITS-1 was amplified from 54 fungarium specimens, including the type specimens of Ciboria, Lambertella, and Rutstroemia, to provide anchors for phylogenetic trees. Multi-locus phylogenetic analysis, in combination with morphological assessments, confirmed that the dollar spot pathogen is not a true Sclerotinia species. Isolates of the dollar spot fungus formed their own well-supported clade, separate from all other fungal specimens tested. Within this clade, two distinct lineages of the pathogen were present, indicating that at least two species are responsible for dollar spot disease of turfgrass. Although their placement within the Rutstroemiaceae was confirmed, these fungi are not members of any known genus in this family. In this presentation, we will discuss the proposed names for the two causal agents of dollar spot in cool- and warmseason turfgrasses.
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Beirn, L. A., L. P. Tredway, M. J. Boehm, A. M. Orshinsky, A. I. Putman, I. Carbone, et al. 2013. Putting to rest a 75 year old controversy: The true taxonomic placement of the dollar spot pathogens of turfgrass. Phytopathology. 103(10S):p. S4.1.
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DOI: 10.1094/PHYTO-103-10-S4.1
Web URL(s):
http://apsjournals.apsnet.org/doi/pdf/10.1094/PHYTO-103-10-S4.1
    Last checked: 10/8/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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MSU catalog number: b2219736a
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