Mycologia (2013) 105, 312-319

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Takayuki Aoki, Jason A. Smith, Lacey L. Mount, David M. Geiser and Kerry O’Donnell (2013)
Fusarium torreyae sp. nov., a pathogen causing canker disease of Florida torreya (Torreya taxifolia), a critically endangered conifer restricted to northern Florida and southwestern Georgia
Mycologia 105 (2), 312-319
Abstract: During a survey for pathogens of Florida torreya (Torreya taxifolia) in 2009, a novel Fusarium species was isolated from cankers affecting this critically endangered conifer whose current range is restricted to northern Florida and southwestern Georgia. Published multilocus molecular phylogenetic analyses indicated that this pathogen represented a genealogically exclusive, phylogenetically distinct species representing one of the earliest divergences within the Gibberella clade of Fusarium. Furthermore, completion of Koch's postulates established that this novel species was the causal agent of Florida torreya canker disease. Here we formally describe this pathogen as a new species, Fusarium torreyae. Pure cultures of this species produced long and slender multiseptate sporodochial conidia that showed morphological convergence with two distantly related fusaria, reflecting the homoplasious nature of Fusarium conidial morphology.
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Database assignments for author(s): Takayuki Aoki

Research topic(s) for pests/diseases/weeds:
identification/taxonomy


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Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Fusarium torreyae Torreya (genus) U.S.A. (SE)