La paroi des asques chez les Pyrénomycètes : étude ultrastructurale. I. Les asques bituniqués typiques

Parguey-Leduc, A.; Janex-Favre, M. C.

doi:10.1139/b82-155

Cited by 12 publications

(7 citation statements)

References 1 publication

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“…The formation of endo- and exoascus is rather secondary, and the layers that are combined are variable. The ascus wall of unitunicate pyrenomycetes is often composed of two tunicae, a thin single- or double-layered exoascus, and a thicker endoascus ( Parguey-Leduc & Janex-Favre 1984 ). Compared to bitunicate fungi sensu stricto, the endoascus has no or only little fibrillar waves and both layers are thinner ( Parguey-Leduc & Janex-Favre 1984 ) and usually remain attached during ascospore discharge ( Webster & Weber 2007 ).…”

Section: Discussionmentioning

confidence: 99%

A fissitunicate ascus mechanism in the Calosphaeriaceae, and novel species of Jattaea and Calosphaeria on Prunus wood

Damm¹,

Crous²,

Fourie³

2008

Pers - Int Mycol J

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During a survey of Prunus wood from South Africa, isolations were made of three presumably Calosphaerialean fungi that formed hyphomycetous, phialidic anamorphs in culture. In order to reveal the phylogenetic relationship of these fungi, they were characterised on a morphological and molecular (LSU and ITS rDNA) basis. Two isolates that formed a teleomorph in culture are newly described as Calosphaeria africana sp. nov. Although asci of Calosphaeria are characterised by having non-amyloid apical rings, two functional wall layers were observed in asci of C. africana, which has hitherto not been observed in any member of the Calosphaeriaceae. However, Calosphaeriaceae (Calosphaeriales, Sordariomycetes) are not closely related to other bitunicate fungi like Dothideomycetes, Chaetothyriales and bitunicate lichens. Possession of two separating wall layers is considered to be a result of both inherited abilities and convergent evolution under a strong selection pressure of the environmental conditions that favour an extension of the ascus. The other two species represented a separate lineage within Calosphaeriaceae, and formed phialophora-like anamorphs. By obtaining the teleomorph in culture, one of them could be identified as a species of Jattaea, described here as Jattaea prunicola sp. nov., while the second, which only produced the anamorph, is named as Jattaea mookgoponga sp. nov. These findings suggest that some species of Jattaea are true members of the Calosphaeriaceae, though the phylogenetic relation of the type, J. algeriensis, remains unknown. Furthermore, it also represents the first report of Jattaea on Prunus wood, and from South Africa.

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Section: Discussionmentioning

confidence: 99%

A fissitunicate ascus mechanism in the Calosphaeriaceae, and novel species of Jattaea and Calosphaeria on Prunus wood

Damm¹,

Crous²,

Fourie³

2008

Pers - Int Mycol J

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“…1, II P U). That is perhaps the case of typical Sordariales, Xylariales and some Diatrypales, where the loose "endoascus" structure is aberrant for typical unitunicates, and recalls bitunicates (Parguey-Leduc and Janex-Favre, 1984). This should have to be proved by a precise examination of the ascus wall development.…”

Section: Ascus Lateral Wall Structurementioning

confidence: 99%

“…Baral, 1987a;Bellemere, 1977;Merkus, 1973-76;Parguey-Leduc and Janex-Favre, 1984;Reynolds, 1987Reynolds, , 1989bVerkley, 1992). Attention was drawn to possible convergence in ascospore wall structure in several genera (Bellemere et al, 1992).…”

Section: Recent Progresses Using Ascus Charactersmentioning

confidence: 99%

Ascomycete Systematics

1994

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A series presenting the results of activities sponsored by the NA TO Science Committee, which aims at the dissemination of advanced scientific and technological knowledge, with a view to strengthening links between scientific communities.The series is published by an international board of publishers in conjunction with the Library of Congress Cataloging in Publication InformationOn file ISBN 978-1-4757-9292-8 ISBN 978-1-4757-9290-4 (eBook) All rights reservedNo part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, microfilming, recording, or otherwise, without written permission from the Publisher

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“…Le corps sous-apical (cs) semi-globuleux, très dense aux électrons, situé dans l'évagination épiplasmique médiane, se prolonge vers le bas, dans l'épiplasme, par le tractus (t) fonné de fibrilles épaisses et sombres, plusieurs foib divisées et dont les rameaux terminaux peuvent s'appliquer sur l 'ascospore som mi tale. Janex-Favre, 1980). Toutefois, chez cette espèce, le corps sous-apical et le tractus sont absents, alors qu'un anneau inférieur, mince, sombre aux électrons, est différencié dans le pendentif.…”

Section: ) Appareil Apical Pourvu De Formations Annexesunclassified

Marius Chadefaud et les Asques: données inédites Études ultrastructurales complémentaires

Bellemere¹,

Janex-Favre

Farguey-Leduc

1987

Bulletin de la Société Botanique de France. Lettres Botaniques

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La paroi des asques chez les Pyrénomycètes : étude ultrastructurale. I. Les asques bituniqués typiques

Cited by 12 publications

References 1 publication

A fissitunicate ascus mechanism in the Calosphaeriaceae, and novel species of <I>Jattaea</I> and <I>Calosphaeria</I> on <I>Prunus</I> wood

A fissitunicate ascus mechanism in the Calosphaeriaceae, and novel species of <I>Jattaea</I> and <I>Calosphaeria</I> on <I>Prunus</I> wood

Ascomycete Systematics

Marius Chadefaud et les Asques: données inédites Études ultrastructurales complémentaires

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