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M C Janexfavre - One of the best experts on this subject based on the ideXlab platform.

  • contribution a l etude de la flore mycologique du maroc les truffes marocaines Discomycetes
    Bulletin trimestriel de la Société mycologique de France, 2001
    Co-Authors: Lahsen Khabar, M C Janexfavre, Larbi Najim, Agnes Pargueyleduc
    Abstract:

    Ce travail represente le resultat de quatorze annees de prospections et d'observations (1984-1998) sur les truffes marocaines . Les auteurs dressent la liste des differentes truffes qu'ils ont pu observer, souvent aussi recolter, dans plusieurs regions du Maroc. Dix especes sont decrites et illustrees a l'aide de photographies prises au microscope photonique et au microscope electronique a balayage. Terfezia leptoderma Tul. et Picoa juniperi Vitt. sont citees pour la premiere fois au Maroc. Une cle preliminaire, tres simplifiee, des differentes especes de truffes marocaines est etablie.

  • l hymenium de morchella deliciosa fr ascomycetes Discomycetes
    Cryptogamie. Bryologie lichénologie, 1998
    Co-Authors: M C Janexfavre, A Pargueyleduc, G Bruxelles
    Abstract:

    Chez Morchella deliciosa deux systemes successifs de paraphyses doivent etre distingues au cours du developpement de l'ascocarpe: 1 - les paraphyses primitives, qui revetent entierement le jeune chapeau, lisse, et qui persistent ensuite seulement au niveau des cretes delimitant les alveoles du chapeau adulte; 2 - les paraphyses hymeniales qui tapissent ces alveoles et qui se forment de maniere discontinue dans les depressions situees entre les cretes, zones ou se developpent egalement l'appareil sporophytique, puis les asques. De type opercule, ceux-ci produisent des ascospores unicellulaires dont la paroi presente une fine ornementation visible en microscopie electronique a balayage.

  • l ascocarpe de terfezia leonis tul Discomycetes tuberales
    Cryptogamie Mycologie, 1994
    Co-Authors: L Khabar, M C Janexfavre, L Najim, Agnes Pargueyleduc
    Abstract:

    La structure de l'ascocarpe hypoge, des asques et des ascospores d'une truffe des sables, Terfezia leonis Tul., a ete observee en microscopie photonique et electronique. Les caracteres propres aux Terfex ont ete reconnus: peridium lisse, glebe comprenant des nodules fertiles et des veines steriles de texture dense, asques a huit ascospores pourvues d'une ornementation d'origine exosporale et d'une endospore. Cette nouvelle etude fait ressortir l'originalite deja soulignee de l'organisation des ascocarpes et des asques chez les Tuberales, ce qui justifie que cet ordre soit conserve au sein des Discomycetes

  • etude ultrastructurale de l hymenium de morchella deliciosa fr ascomycetes Discomycetes
    Cryptogamie Mycologie, 1993
    Co-Authors: M C Janexfavre, A Pargueyleduc, G Bruxelles
    Abstract:

    L'evolution des asques et des ascospores, ainsi que les paraphyses de Morchella deliciosa sont examinees en microscopie electronique a transmission. Les ascospores se forment classiquement a partir de la fragmentation d'une vesicule ascale. La paroi ascosporale comporte de l'interieur vers l'exterieur: une epispore reguliere et stratifiee, une exospore formant une ornementation peu developpee, une perispore et une ectospore

G Bruxelles - One of the best experts on this subject based on the ideXlab platform.

  • l hymenium de morchella deliciosa fr ascomycetes Discomycetes
    Cryptogamie. Bryologie lichénologie, 1998
    Co-Authors: M C Janexfavre, A Pargueyleduc, G Bruxelles
    Abstract:

    Chez Morchella deliciosa deux systemes successifs de paraphyses doivent etre distingues au cours du developpement de l'ascocarpe: 1 - les paraphyses primitives, qui revetent entierement le jeune chapeau, lisse, et qui persistent ensuite seulement au niveau des cretes delimitant les alveoles du chapeau adulte; 2 - les paraphyses hymeniales qui tapissent ces alveoles et qui se forment de maniere discontinue dans les depressions situees entre les cretes, zones ou se developpent egalement l'appareil sporophytique, puis les asques. De type opercule, ceux-ci produisent des ascospores unicellulaires dont la paroi presente une fine ornementation visible en microscopie electronique a balayage.

  • etude ultrastructurale de l hymenium de morchella deliciosa fr ascomycetes Discomycetes
    Cryptogamie Mycologie, 1993
    Co-Authors: M C Janexfavre, A Pargueyleduc, G Bruxelles
    Abstract:

    L'evolution des asques et des ascospores, ainsi que les paraphyses de Morchella deliciosa sont examinees en microscopie electronique a transmission. Les ascospores se forment classiquement a partir de la fragmentation d'une vesicule ascale. La paroi ascosporale comporte de l'interieur vers l'exterieur: une epispore reguliere et stratifiee, une exospore formant une ornementation peu developpee, une perispore et une ectospore

Irma J Gamundi - One of the best experts on this subject based on the ideXlab platform.

  • catalogo de los Discomycetes fungi de patagonia tierra del fuego y areas antarticas adjacentes
    Darwiniana nueva serie, 2004
    Co-Authors: Irma J Gamundi, D W Minter, Andrea Irene Romero, Viviana Andrea Barrera, Andreina L Giaiotti, Maria Ines Messuti, Marina Stecconi
    Abstract:

    Information about fungi of the orders Cyttariales, Helotiales, Ostropales, Pezizales, Rhytismatales and Thelebolales (Discomycetes) collected in Patagonia, Tierra del Fuego and adjacent antarctic areas (Patagonia), and information about their associated organisms was located, abstracted, keyboarded, edited and validated. The largest single information sources were dried reference collections in Argentina and elsewhere, and published information as listed in this work’s bibliography. Other records were derived from fresh collections, other reference collections and field observations. Information is stored in a computerized system of relational databases for taxonomic, nomenclatural, bibliographic and biological observations data. This system allows storage of parallel data in different languages, and distinguishes original information from current opinion about what that information may mean. In the  Biological Records Database , 5029 separate records were created for observations on the spatial and temporal occurrence of living organisms in the region. Of these 2613 were Discomycetes, with records derived as follows: Patagonia and Tierra del Fuego (Argentina, 1854; Chile, 687); adjacent antarctic areas (72). Excluding synonyms, these Discomycetes  represented 361 species and subspecific taxa (160 genera, 22 families and 7 orders) the remaining records were organisms associated with these Discomycetes as follows: 163 of animals (8 species, 8 genera, 6 families and 5 orders); 2 of chromistans; 223 of fungi (52 species, 54 genera, 26 families and 13 orders); 2028 of plants (159 species, 122 genera, 59 families and 39 orders). Each of these different taxa (and each known synonym) is represented by a separate record in the Taxonomic & Nomenclatural Database . Information about relevant bibliographic sources is stored in more than 120 records in the Bibliographic Database . The databases were used to produce the present checklist of names given to Discomycetes observed in Patagonia. A typical entry comprises the fungus name, author(s), and information on the original place of publication of the name, together with any known synonyms (classification at generic level and above largely follows the 9th edition of Ainsworth & Bisby’s Dictionary of the Fungi , Kirk et al., 2001). This is followed by basic information derived from the databases: the number of times the fungus has been recorded from the region, the date of the earliest record from the region, months in which the fungus has been observed in the region, geographical distribution by country (and within countries by an appropriate subnational division), associated organism and substrata, a list of reference collection numbers identifying preserved specimens and sometimes living isolates of each fungus, and bibliographic citations identifying any published sources of the information. The status of each name is indicated and, where appropriate, synonyms are provided and cross-indexed. The list is accompanied by an explanatory introduction, a taxonomic index, indexes by countries and subnational divisions of the region, by taxonomy of associated organisms and by substrata, and a bibliography. No new taxa are described. Apart from four new nomenclatural combinations, no new scientific names of any sort are knowingly introduced.

  • checklist of the Discomycetes fungi of patagonia tierra del fuego and adjacent antarctic areas
    Darwiniana, 2004
    Co-Authors: Irma J Gamundi, D W Minter, Andrea Irene Romero, Viviana Andrea Barrera, Andreina L Giaiotti, Maria Ines Messuti, Marina Stecconi
    Abstract:

    Fil: Gamundi, Irma Josefa. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; Argentina

  • Discomycetes fungi ascomycota de chile austral i
    Darwiniana, 2003
    Co-Authors: Irma J Gamundi
    Abstract:

    Gamundi, I. J. 2003. Discomycetes (Fungi, Ascomycota) of southern Chile. I. Darwiniana 41(1-4): 29-36. Eleven species of Helotiaceae (Helotiales) collected in the Regions X and XI Chile are mentioned here. Amidst them, Hymenoscyphus leucopus var. microspora var. nov. is described, and Cyathicula fuegiana, Cyathicula chlorosplenioides, Hymenoscyphus nubilipes , Pezoloma iodocyanescens and Phaeohelotium recurvum are new records for Chile.

  • nota sobre Discomycetes andino patagonicos ii novedades taxonomicas
    Darwiniana, 1998
    Co-Authors: Irma J Gamundi, Andreina L Giaiotti
    Abstract:

    Descriptions and illustrations of some Pezizales and Helotiales from the Nothofagus forest of Argentinaare given. A new species is proposed: Hyalopeziza striata sp. nov. Lamprospora annulata Seav. is the first record for the southern hemisphere. First records for Argentina are: Galactinia praetervisa Bres., Helvella leucopus Pers., Plectania rhytidia (Berk. in Hook. f.) Nannf. & Korf in Korf, Velutarina rufo-olivacea (Alb. & Schwein. Fr.) Korf, Bisporella discedens (P. A. Karst.) Carpenter. Comments on the distribution and ecology of some species are given.

Qi Zhao - One of the best experts on this subject based on the ideXlab platform.

  • taxonomy and phylogeny of operculate Discomycetes pezizomycetes
    Fungal Diversity, 2018
    Co-Authors: Kevin D Hyde, Anusha H Ekanayaka, E Gareth B Jones, Qi Zhao
    Abstract:

    The class Pezizomycetes is monophyletic within the subdivision Pezizomycotina. The main distinguishing character of this class is operculate asci, although in some taxa this character has been lost. The circumscription of the families and generic level delimitation in Pezizomycetes is still controversial, although several molecular phylogenetic studies have been published on this group. This paper reviews 21 families of Pezizomycetes including five new families, which are introduced here, viz. Kallistoskyphaceae, Pseudombrophilaceae, Pulvinulaceae, Strobiloscyphaceae and Tarzettaceae. Moreover, this study provides a modified backbone tree based on phylogenetic analysis of five combined loci. Descriptions and illustrations of representative taxa for the families are provided from collections made in China, Thailand and the UK, herbarium material from international herbaria (FH, FLAS, H, HKAS and MA) and the literature. Pezizales separates into six major clades. Clade 1 of Pezizales includes the families Ascobolaceae and Pezizaceae. Clade 2 is the new family Kallistoskyphaceae. Clade 3 comprises the families Caloscyphaceae, Karstenellaceae and Rhizinaceae. Clade 4 represents the families Discinaceae, Helvellaceae, Morchellaceae, Tuberaceae and Underwoodia columnaris lineage. Clade 5 includes Chorioactidaceae, Sarcoscyphaceae and Sarcosomataceae and Clade 6 comprises Ascodesmidaceae, Glaziellaceae, Otideaceae, Pseudombrophilaceae, Pulvinulaceae, Pyronemataceae, Strobiloscyphaceae and Tarzettaceae. New sequence data belonging to ITS, LSU, SSU, TEF, RPB2 gene regions from 40 pezizalian species are provided here. The paper provides a working document for apothecial Pezizomycetes which can be modified as new data comes to light. It is hoped that by illustrating taxa we provide stimulation and interest in the operculate Discomycetes, so that further research is carried out on this remarkable, but poorly studied group of fungi.

  • Discomycetes: the apothecial representatives of the phylum Ascomycota
    Fungal Diversity, 2017
    Co-Authors: Hiran A. Ariyawansa, Sinang Hongsanan, A J L Phillips, Dinushani A. Daranagama, E.b.g. Jones, Subashini C. Jayasiri, Kevin D Hyde, Qi Zhao
    Abstract:

    Discomycetes are an artificial grouping of apothecia-producing fungi in the phylum Ascomycota. Molecular-based studies have revealed that the Discomycetes can be found among ten classes of Ascomycota. The classification of Discomycetes has been a major challenge due to the lack of a clear understanding of the important morphological characters, as well as a lack of reference strains. In this review, we provide a historical perspective of Discomycetes, notes on their morphology (including both asexual and sexual morphs), ecology and importance, an outline of discomycete families and a synoptical cladogram of currently accepted families in Ascomycota showing their systematic position. We also calculated evolutionary divergence times for major discomycetous taxa based on phylogenetic relationships using a combined LSU, SSU and RPB2 data set from 175 strains and fossil data. Our results confirm that Discomycetes are found in two major subphyla of the Ascomycota: Taphrinomycotina and Pezizomycotina. The taxonomic placement of major discomycete taxa is briefly discussed. The most basal group of Discomycetes is the class Neolectomycetes, which diverged from other Taphrinomycotina around 417 MYA (216–572), and the most derived group of Discomycetes, the class Lecanoromycetes, diverged from Eurotiomycetes around 340 MYA (282–414). Further clarifications based on type specimens, designation of epitypes or reference specimens from fresh collections, and multi-gene analyses are needed to determine the taxonomic arrangement of many Discomycetes.

Stephen B. Goodwin - One of the best experts on this subject based on the ideXlab platform.

  • the barley scald pathogen rhynchosporium secalis is closely related to the Discomycetes tapesia and pyrenopeziza
    Fungal Biology, 2002
    Co-Authors: Stephen B. Goodwin
    Abstract:

    Rhynchosporium secalis causes an economically important foliar disease of barley, rye, and other grasses known as leaf blotch or scald. This species has been difficult to classify due to a paucity of morphological features; the genus Rhynchosporium produces conidia from vegetative hyphae directly, without conidiophores or other structures. Furthermore, no teleomorph has been associated with R. secalis, so essentially nothing is known about its phylogenetic relationships. To identify other fungi that might be related to R. secalis, the 18S ribosomal RNA gene and the internal transcribed spacer (ITS) region (ITS1, 5.8S rRNA gene, and ITS2) were sequenced and compared to those in databases. Among 31 18S sequences downloaded from GenBank, the closest relatives to R. secalis were two species of Graphium (hyphomycetes) and two other accessions that were not identified to genus or species. Therefore, 18S sequences were not useful for elucidating the phylogenetic relationships of R. secalis. However, analyses of 76 ITS sequences revealed very close relationships among R. secalis and species of the discomycete genera Tapesia and Pyrenopeziza, as well as several anamorphic fungi including soybean and Adzuki-bean isolates of Phialophora gregata. These species all clustered together with 100% bootstrap support. On the basis of these results, the teleomorph of R. secalis, if it exists, most likely will be a small apothecium produced directly on dead, infected host tissue. The ITS analysis also indicated that higher-level classifications within the Discomycetes need to be revised, and that Tapesia and Pyrenopeziza probably do not belong in the Dermateaceae.