Rostraureum tropicale

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Rostraureum tropicale
Scientific classification
Kingdom:
Fungi
Division:
Ascomycota
Class:
Sordariomycetes
Order:
Diaporthales
Family:
Cryphonectriaceae
Genus:
Rostraureum
Species:
R. tropicale
Binomial name
Rostraureum tropicale
Gryzenh. & M.J.Wingf. (2005)

Rostraureum tropicale is a species of fungus from genus Rostraureum that is found in Ecuador.

Distribution and habitat[]

Rostraureum tropicale is a pathogen of Terminalia ivorensis and causes basal stem cankers on dying trees. The fungus is distributed in the lowland tropics of Ecuador.[1] Hosts include Terminalia ivorensis and Terminalia superba (both in family Combretaceae of the Myrtales).

Morphology[]

Morphologically, Rostraureum tropicale has characteristics similar to those for Cryphonectria, Endothia and Chrysoporthe, but appears to be superficially closest to .[1] The fungus displays characteristics typical of diaporthalean fungi, with periphysate ostiolar canals with no paraphyses, and asci are unitunicate with refractive . Fruiting structures are orange to yellow, and ascospores are one-septate and fusoid to ellipsoid.

Rostraureum tropicale can be distinguished from Endothia, Cryphonectria and Chrysoporthe by the observation that perithecial necks are not embedded in well-developed . Additionally, it can be distinguished from Chrysoporthe by the presence of orange perithecial necks instead of fuscous-black necks.[1]

Phylogeny[]

Rostraureum tropicale is phylogenetically most closely related to species of Endothia, based on ribosomal (ITS) and β-tubulin DNA sequences. However, species of Chrysoporthe and Cryphonectria belong to the same superclade and are thus closely related to Rostraureum tropicale.[1]

Pathogenicity[]

Rostraureum tropicale is pathogenic towards Terminalia ivorensis and a closely related host, Terminalia superba, causing well-developed stem cankers within six weeks of inoculation. It is also more pathogenic than , which causes smaller lesions on Terminalia superba.[1] However, C. cubensis is not usually a pathogen of trees in the Combretaceae.[2]

References[]

  1. ^ a b c d e Gryzenhout, M.; Myburg, H.; Wingfield, B. D.; Montenegro, F.; Wingfield, M. J. (2005). "Rostraureum tropicale gen. sp. nov. (Diaporthales) associated with dying Terminalia ivorensis in Ecuador". Mycological Research. 109 (9): 1029–1044. doi:10.1017/S0953756205003291.
  2. ^ Gryzenhout, M.; Wingfield, B. D.; Wingfield, M. J. (2009). Taxonomy, phylogeny, and ecology of bark-infecting and tree-killing fungi in the Cryphonectriaceae. APS Press.

External links[]

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