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Xenochalara, a new genus of dematiaceous hyphomycetes for chalara-like fungi with apical wall building conidial development

dc.contributor.authorCoetsee C.
dc.contributor.authorWingfield M.J.
dc.contributor.authorCrous P.W.
dc.contributor.authorWingfield B.D.
dc.date.accessioned2011-05-15T15:54:54Z
dc.date.available2011-05-15T15:54:54Z
dc.date.issued2000
dc.identifier.citationSouth African Journal of Botany
dc.identifier.citation66
dc.identifier.citation2
dc.identifier.issn2546299
dc.identifier.urihttp://hdl.handle.net/10019.1/9464
dc.description.abstractCeratocystis autographa Bakshi is unusual amongst the ophiostomatoid fungi in that it produces two distinct anamorphs, typifying different teleomorph genera. A chalara-like anamorph characteristic of the genus Ceratocystis sensu stricto Ellis and Halst. and a Sporothrix Hektoen and C.F. Perkins anamorph typical of the genus Ophiostoma Syd. and P. Syd., have been described for the fungus. In a recent study, an isolate resembling C. autographa, that was collected from Juniperus L., was shown to have a different type of conidiogenesis to that of typical species of Chalara (Corda) Rabenh. Furthermore, cycloheximide tolerance and the presence of rhamnose in the cell walls of this isolate also suggested that it was more closely related to Ophiostoma than to Ceratocystis s. str. Parsimony analysis of ribosomal DNA sequence data in this study showed that this isolate formed a monophyletic group, distinct from Ceratocystis isolates and from Ophiostoma ulmi (Buisman) Nannf. The chalara-like anamorph from Juniperus is also distinct from typical Chalara anamorphs of Ceratocystis s. str. in that it produces conidia from phialides via apical wall building, in contrast to the ring wall building typical of Chalara species. We, therefore, propose the establishment of a new genus, Xenochalara gen. nov., for this and other chalara-like species producing conidia by apical wall building.
dc.subjectcell wall
dc.subjectCeratocystis sensu
dc.subjectconidium
dc.subjectcycloheximide
dc.subjectfungicide tolerance
dc.subjectfungus cell
dc.subjectfungus
dc.subjectmonophyly
dc.subjectrhamnose
dc.subjectribosomal DNA
dc.subjectspecies difference
dc.subjectCeratocystis autographa
dc.subjectChalara
dc.subjectJuniperus
dc.subjectOphiostoma ulmi
dc.subjectSporothrix
dc.subjectXenochalara
dc.titleXenochalara, a new genus of dematiaceous hyphomycetes for chalara-like fungi with apical wall building conidial development
dc.typeArticle
dc.description.versionArticle


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