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Abstract Detail



Mycological Section

Walker, Allison [1], Hirooka, Yuuri [2], Landry, Brandon L. [3], Walker, Donald M. [4].

New species of Plagiostoma from the United States.

Members of the genus Plagiostoma (Gnomoniaceae, Diaporthales) are plant pathogenic and endophytic microfungi that inhabit woody and herbaceous plants in temperate regions of the northern hemisphere. They produce perithecial and pycnidial fruiting bodies on overwintered leaves and twigs of herbaceous plants, shrubs, and trees. Several species of Plagiostoma including P. apiculatum (willow canker), P. fraxini (ash/fringetree anthracnose), and P. populinum (poplar canker) can cause significant disease in shade trees. In this study, pure cultures were isolated from specimens of Plagiostoma collected from Michigan, New York, Oregon and Washington. Regions of the β-tubulin and tef-1α genes and the complete ITS regions 1 and 2, including the 5.8S rDNA, were sequenced and analyzed phylogenetically. Genealogical concordance phylogenetic species recognition and genealogical non-discordance methods were used in addition to morphological characters to define species. Phylogenetic analyses revealed two previously unknown species of Plagiostoma, which are described and illustrated. These species are associated with host plants in the genera Acer (Sapindaceae) and Ribes (Grossulariaceae), respectively, collected from temperate deciduous forests of the northern United States. This study increases our understanding of the diversity of fungi in the Gnomoniaceae.


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1 - Acadia University, Biology, 33 Westwood Ave, Wolfville, NS, B4P 2R6 , Canada
2 - Hosei University, Bioscience, Tokyo, Japan
3 - Acadia University, Biology, Wolfville, NS, B4P 2R6 , Canada
4 - University of Findlay, Biology, Findlay, OH, 45840, USA

Keywords:
Gnomoniaceae
Diaporthales
taxonomy
fungal diversity
Acer
Ribes.

Presentation Type: Poster:Posters for Sections
Session: P
Location: Hall D/The Shaw Conference Centre
Date: Monday, July 27th, 2015
Time: 5:30 PM
Number: PMY058
Abstract ID:781
Candidate for Awards:None


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