Ascospore sculpturing and generic concepts in the Testudinaceae (syn. Zopfiaceae)

Hawksworth, D. L.

doi:10.1139/b79-017

Cited by 28 publications

(23 citation statements)

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“…Their ITS sequences showed no homology with Leptosphaeria. Five strains from Sudanese thorns and showing superficial resemblance to one of the known agents of mycetoma, Neotestudina rosatii, were morphologically identified as Ulospora bilgramii (13). Five reference strains of N. rosatii were clearly different but could be aligned with confidence.…”

Section: Resultsmentioning

confidence: 99%

Environmental Occurrence ofMadurella mycetomatis, the Major Agent of Human Eumycetoma in Sudan

et al. 2002

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Madurella mycetomatis is the main causative agent of human eumycetoma, a severe debilitating disease endemic in Sudan. It has been suggested that eumycetoma has a soil-borne or thorn prick-mediated origin. For this reason, efforts were undertaken to culture M. mycetomatis from soil samples (n ‫؍‬ 43) and thorn collections (n ‫؍‬ 35) derived from areas in which it is endemic. However, ribosomal sequencing data revealed that the black fungi obtained all belonged to other fungal species. In addition, we performed PCR-mediated detection followed by restriction fragment length polymorphism (RFLP) analysis for the identification of M. mycetomatis DNA from the environmental samples as well as biopsies from patients with mycetoma. In the case of the Sudanese soil samples, 17 out of 74 (23%) samples were positive for M. mycetomatis DNA. Among the thorn collections, 1 out of 22 (5%) was positive in the PCR. All PCR RFLP patterns clearly indicated the presence of M. mycetomatis. In contrast, 15 Dutch and English control soil samples were all negative. Clinically and environmentally obtained fungal PCR products share the same PCR RFLP patterns, suggesting identity, at least at the species level. These observations support the hypothesis that eumycetoma is primarily environmentally acquired and suggest that M. mycetomatis needs special conditions for growth, as direct isolation from the environment seems to be impossible.

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Section: Resultsmentioning

confidence: 99%

Environmental Occurrence ofMadurella mycetomatis, the Major Agent of Human Eumycetoma in Sudan

et al. 2002

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“…Hyde has somewhat similar ascospores in 4-spored asci, but this taxon has unitunicate asci (Ranghoo and Hyde 1999). The morphological characters of Bimuria , such as ascospore release and large, thick-walled ascospores may be an adaptation to its soil-borne habitat (Hawksworth et al 1979). …”

Section: Notesmentioning

confidence: 99%

Pleosporales

et al. 2011

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One hundred and five generic types of Pleosporales are described and illustrated. A brief introduction and detailed history with short notes on morphology, molecular phylogeny as well as a general conclusion of each genus are provided. For those genera where the type or a representative specimen is unavailable, a brief note is given. Altogether 174 genera of Pleosporales are treated. Phaeotrichaceae as well as Krie-geriella, Zeuctomorpha and Muroia are excluded from Pleosporales. Based on the multigene phylogenetic analysis, the suborder Massarineae is emended to accommodate five families, viz. Lentitheciaceae, Massarinaceae, Montagnulaceae, Morosphaeriaceae and Trematosphaeriaceae.

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“…Phylogenetically, the Lophiotrema clade is close to the families Testudinaceae Zhang et al 2009a,b) and Tetraplosphaeriaceae ) in the Pleosporales. Morphologically, however, species in the Lophiotrema clade are quite different from members of the Testudinaceae; the latter is characterized by cleistothecial ascomata and sculptured ascospores (von Arx 1971;Hawksworth 1979). Similarly, Lophiotrema species do not have the Tetraploa-like hyphomycetous anamorphs of taxa in the Tetraplosphaeriaceae ).…”

Section: Familial Placement Of Lophiotremamentioning

confidence: 99%

Taxonomic revision of Lophiostoma and Lophiotrema based on reevaluation of morphological characters and molecular analyses

Hirayama

Tanaka

2011

Mycoscience

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Lophiostoma and Lophiotrema share several morphological and ecological features. They have been regarded as closely related genera within the family Lophiostomataceae, but their morphological circumscriptions have been uncertain. To clarify the generic definitions of Lophiostoma and Lophiotrema, we conducted phylogenetic analyses of 29 isolates of these genera based on the SSU and LSU nrDNA sequences, and also reevaluated several key characters previously used for their generic characterization. Our results clearly confirmed that Lophiostoma and Lophiotrema are distinct genera belonging to different families; the ascus shape, including length of the ascus stipe, is a reliable taxonomic indicator to allow discrimination between the genera. In Lophiostoma species, asci are clavate with relatively long stipes [mostly (10-) 15-30 lm in length], whereas in Lophiotrema the asci are cylindrical with short stipes (up to 15 lm long). A new family, Lophiotremataceae, is proposed to accommodate species in the Lophiotrema clade that was distantly placed from the Lophiostomataceae within the Pleosporales. Lophiostoma quadrisporum, collected from twigs of Liriodendron tulipifera, is described as a new species with distinctive 4-spored asci. Lophiotrema vitigenum, which has clavate asci with long stipes, is transferred to Lophiostoma.

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Ascospore sculpturing and generic concepts in the Testudinaceae (syn. Zopfiaceae)

Cited by 28 publications

References 0 publications

Environmental Occurrence ofMadurella mycetomatis, the Major Agent of Human Eumycetoma in Sudan

Environmental Occurrence ofMadurella mycetomatis, the Major Agent of Human Eumycetoma in Sudan

Pleosporales

Taxonomic revision of Lophiostoma and Lophiotrema based on reevaluation of morphological characters and molecular analyses

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