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| Lombard, L.; Rodas, C.A.; Crous, P.W.; Wingfield, B.D.; Wingfield, M.J.. |
| Calonectria (Ca.) species and their Cylindrocladium (Cy.) anamorphs are well-known pathogens of forest nursery plants in subtropical and tropical areas of the world. An investigation of the mortality of rooted Pinus cuttings in a commercial forest nursery in Colombia led to the isolation of two Cylindrocladium anamorphs of Calonectria species. The aim of this study was to identify these species using DNA sequence data and morphological comparisons. Two species were identified, namely one undescribed species, and Cy. gracile, which is allocated to Calonectria as Ca. brassicae. The new species, Ca. brachiatica, resides in the Ca. brassicae species complex. Pathogenicity tests with Ca. brachiatica and Ca. brassicae showed that both are able to cause disease... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Β-tubulin; Calonectria; Cylindrocladium; Histone; Pinus; Root disease. |
| Ano: 2009 |
URL: http://www.repository.naturalis.nl/record/532052 |
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| Essakhi, S.; Mugnai, L.; Crous, P.W.; Groenewald, J.Z.; Surico, G.. |
| Petri disease and esca are very destructive grapevine decline diseases that occur in most countries where grapevine (Vitis vinifera) is cultivated. Phaeoacremonium species are among the principal hyphomycetes associated with symptoms of the two diseases, producing a range of enzymes and phytotoxic metabolites. The present study compared the phylogeny of a global collection of 118 Phaeoacremonium isolates from grapevines, in order to gain a better understanding of their involvement in Petri disease and esca. Phylogenetic analyses of combined DNA sequence datasets of actin and β-tubulin genes revealed the presence of 13 species of Phaeoacremonium solated from esca diseased grapevines. Phaeoacremonium aleophilum was the most frequently isolated species with... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Actin; Β-tubulin; Esca; Morphology; Phaeoacremonium; Phylogeny. |
| Ano: 2008 |
URL: http://www.repository.naturalis.nl/record/532098 |
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| Verkley, G.J.M.; Dukik, K.; Renfurm, R.; Göker, M.; Stielow, J.B.. |
| Based on analyses of concatenated internal transcribed spacer regions of the nrDNA operon (ITS), large subunit rDNA (LSU), γ-actin and β-tubulin gene sequences the taxonomy of coniothyrium-like fungi belonging in the family Montagnulaceae, order Pleosporales, was re-assessed. Two new genera are proposed, Alloconiothyrium, to accommodate A. aptrootii sp. nov., and Dendrothyrium for D. longisporum sp. nov. and D. variisporum sp. nov. One new species is described in Paraconiothyrium, viz. Parac. archidendri sp. nov., while two species so far classified in Paraconiothyrium are transferred to Paraphaeosphaeria, viz. Paraph. minitans comb. nov. and Paraph. sporulosa comb. nov. In Paraphaeosphaeria five new species are described based on asexual morphs, viz.... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Γ-actin; Β-tubulin; ITS; LSU; Microsphaeropsis; Paraconiothyrium; Taxonomy. |
| Ano: 2014 |
URL: http://www.repository.naturalis.nl/record/532399 |
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| Roets, F.; Wingfield, B.D.; Beer, Z.W. de; Wingfield, M.J.; Dreyer, L.L.. |
| The genus Ophiostoma (Ophiostomatales) has a global distribution and species are best known for their association with bark beetles (Curculionidae: Scolytinae) on conifers. An unusual assemblage of these fungi is closely associated with the African endemic plant genus Protea (Proteaceae). Protea-associated Ophiostoma species are ecologically atypical as they colonise the fruiting structures of various serotinous Protea species. Seven species have been described from this niche in South Africa. It has been speculated that novel species may be present in other African countries where these host plants also occur. This view was corroborated by recent collections of two unknown species from Protea caffra trees in Zambia. In the present study we evaluate the... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Β-tubulin; ITS; Ophiostoma; Phylogeny; Protea; Taxonomy. |
| Ano: 2010 |
URL: http://www.repository.naturalis.nl/record/532360 |
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