Conidiogenesis in Ceratocystis ulmi, Ceratocystis piceae, and Graphium penicillioides

Crane, J. L.; Schoknecht, Jean D.

doi:10.2307/2441201

Cited by 26 publications

(9 citation statements)

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“…In the original definition for the anamorph genus Pesotum, Crane and Schoknecht (1973) included a continuum of structures between the classical synnematous structure at the one extreme, and a typical mononematous, denticulate Sporothrix conidiophore, at the other. Several intermediate structures and sizes had been recognized, and contributed to the confusing use of generic names such as Cladosporium, Cephalosporium, Hyalodendron, and Rhinotrichum to describe Ophiostoma anamorphs in many previous publications (Przybyl and de Hoog 1989;Benade et al 1997Benade et al , 1998.…”

Section: Discussionmentioning

confidence: 99%

Delimitation of Ophiostoma quercus and its synonyms using multiple gene phylogenies

et al. 2009

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Ophiostoma quercus is a morphologically variable species that causes sapstain on mostly hardwood hosts worldwide. Several species have been suggested as synonyms of O. quercus in the past, including O. fagi, O. roboris, O. valachicum, O. kubanicum, and O. catonianum. A recent collection of isolates resembling O. quercus from Azerbaijan provided the opportunity to reconsider the accuracy of these synonymies based on morphology and DNA sequence data. Four gene regions, the ribosomal internal transcribed spacer regions including the 5.8 s gene, part of the β-tubulin gene, translation elongation factor-1α, and histone gene, were used to determine the phylogenetic relationships between the various species and isolates of different origin. In all four resulting phylogenetic trees, isolates of O. quercus, O. fagi, and O. roboris formed a single, well-supported cluster, but with some internal variation. All the other species in the analyses, including O. piceae and O. catonianum, grouped distinctly with good node support. These results thus support the synonymy of O. fagi and O. roboris with O. quercus, and confirm that O. piceae and O. catonianum are distinct taxa. Ophiostoma valachicum and O. kubanicum could not be considered due to the absence of cultures, but based on published descriptions, we argue that O. valachicum should be regarded as a valid species in need of neotypification. Ophiostoma kubanicum was never validly described and should be excluded from the list of synonyms of O. quercus.

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Section: Discussionmentioning

confidence: 99%

Delimitation of Ophiostoma quercus and its synonyms using multiple gene phylogenies

et al. 2009

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“…The • assay cultures were periodically tested for fertility by crossing with the opposite sexual mating type. Other Ceratocystis species were identified by the formation of characteristic fruiting structures (CRANE and SCHOKNECHT 1973;UPADHYAY 1981) Oct. 4, 1984-MayI0J985 Apr.…”

Section: Methodsmentioning

confidence: 99%

Nitidulids as vectors of the oak wilt fungus and other Ceratocystis spp. in Texas

Appel

Kurdyla

Lewis

1990

European Journal of Forest Pathology

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Sap-feeding nitidulid beetles were trapped for 15 months at four oak wilt centers in central Texas and assayed for the presence of Ceratocystis fagacearum. Levels of contamination with the pathogen ranged 0.3% (Kerrville) -2.0% (Austin); also detected were G. piceae at slightly higher levels and a low number of beetles carrying C. pluriannulata. The percentages of contaminated beetles were similar to those reported for other parts of the oak wilt range in the USA, but probable species differences in Texas were detected.

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“…Sexual forms of these fungi commonly produce ascomata with long, erect necks giving rise to sticky spore drops that facilitate dispersal by insects (Malloch and Blackwell 1993). Asexual structures are typically erect conidiophores with sticky spores at their apices (Pesotum, Hyalorhinocladiella and Leptographium) or dry spores (Sporothrix) that can be wind dispersed (Ingold 1971;Crane and Schoknecht 1973;Malloch and Blackwell 1993).…”

Section: Introductionmentioning

confidence: 99%

“…The anamorph genus Pesotum was established to accommodate species that produce both synnematous and mononematous conidiophores, with sympodially proliferating conidiogenous cells (Crane and Schoknecht 1973). However, its taxonomic placement in Ophiostoma has been the source of considerable debate.…”

Section: Introductionmentioning

confidence: 99%

Pesotum australisp. nov. andOphiostoma quercusassociated withAcacia mearnsiitrees in Australia and Uganda, respectively

Nkuekam

Jacobs

Beer

et al. 2008

Austral. Plant Pathol.

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Abstract. Pesotum accommodates synnematal anamorphs of Ophiostoma spp. with sympodially proliferating conidiogenous cells. These fungi are usually closely associated with wounds on trees and the insects that visit them. During tree disease surveys in Uganda, as well as studies of fungi infecting wounds on Acacia mearnsii trees in Uganda and Australia, many isolates resembling species of Pesotum were collected. The aim of this study was to identify these fungi using both morphological and DNA sequence comparisons. The Pesotum, anamorph of O. quercus was the only species collected from multiple collections in Uganda. Collections from Australia represent a new species of Pesotum described here as P. australi sp. nov.

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Conidiogenesis in Ceratocystis ulmi, Ceratocystis piceae, and Graphium penicillioides

Cited by 26 publications

References 0 publications

Delimitation of Ophiostoma quercus and its synonyms using multiple gene phylogenies

Delimitation of Ophiostoma quercus and its synonyms using multiple gene phylogenies

Nitidulids as vectors of the oak wilt fungus and other Ceratocystis spp. in Texas

Pesotum australisp. nov. andOphiostoma quercusassociated withAcacia mearnsiitrees in Australia and Uganda, respectively

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