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Marc Stadler - One of the best experts on this subject based on the ideXlab platform.
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minutellins a d azaphilones from the stromata of annulohypoxylon minutellum Xylariaceae
Phytochemistry, 2017Co-Authors: Eric Kuhnert, Frank Surup, Sandra Halecker, Marc StadlerAbstract:During the course of our screening for new metabolites with chemotaxonomic importance from stromata of fungi from the family Xylariaceae, we characterized several interesting metabolites in the fungus Annulohypoxylon minutellum. Extraction of the fruiting bodies and purification by preparative HPLC resulted in the isolation of five metabolites. The main compound was identified as the known metabolite hinnulin A (5), while four minor compounds were found to represent previously undescribed azaphilones, named minutellins A – D (1–4). Their planar structures were elucidated using NMR and HRESIMS data; absolute stereochemistry was assigned by CD data and Mosher's method. Compounds 1, 3 and 5 showed cytotoxic effects against murine and human cells. As the production of 1–5 is restricted to a group of closely related Annulohypoxylon species, they serve well as chemotaxonomic marker.
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truncatones a d benzo j fluoranthenes from annulohypoxylon species Xylariaceae ascomycota
Tetrahedron, 2016Co-Authors: Enge Sudarman, Eric Kuhnert, Esteban Benjamin Sir, Kevin D Hyde, Frank Surup, Marc StadlerAbstract:Abstract From stromata (fruiting bodies) of three xylariaceous fungi belonging to the genus Annulohypoxylon (A. leptascum, A. cf. truncatum and an unidentified Annulohypoxylon sp.), truncatone A (1), three unprecedented derivatives named truncatones B–D (2–4) besides the known 4,5,4′,5′-tetrahydroxy-1,1′-binaphthyl (BNT, 5), hypoxylonol C (6) and hypoxylonol F (7) were isolated. Planar structures of the new benzo[j]fluoranthene derivatives 2–4 were determined on the basis of NMR and HRESIMS data. While the relative configuration of 4 was demonstrated by ROESY NMR data and 1H,1H coupling constants, absolute configurations of 1, 2, 4 were determined by CD spectroscopy. Compounds 1, 3 and 4 exhibited cytotoxicity against the mouse fibroblast cell line L929.
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new species and reports of hypoxylon from argentina recognized by a polyphasic approach
Mycological Progress, 2016Co-Authors: Eric Kuhnert, Christopher Lambert, Adriana I Hladki, Andrea I Romero, Marc StadlerAbstract:A preliminary account of Hypoxylon species (Xylariaceae) from the hitherto widely unexplored “Yungas” mountain forests of Northwest Argentina is presented. Two new species are described based on extensive morphological, molecular (ITS region of rDNA, partial β-tubulin gene) and chemotaxonomic data. Hypoxylon spegazzinianum is close to H. erythrostroma, but differs by larger ascospores and a virgariella-like asexual morph. Hypoxylon calileguense resembles H. subgilvum when growing on wood, but can be distinguished by larger ascospores and a fawn to brick stromatal surface colour. Stromata found on bark have affinities to H. pelliculosum, but differ in their stromatal surface colour and conspicuous amyloid apical apparatus. In addition, nine taxa of Hypoxylon are reported for Argentina for the first time, and some details on their asexual state and stromatal secondary metabolites are reported. An updated dichotomous key for Hypoxylon species from Argentina is provided.
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anthostomella is polyphyletic comprising several genera in Xylariaceae
Fungal Diversity, 2015Co-Authors: Marc Stadler, Dinushani A Daranagama, Kevin D Hyde, Qing Tian, Erio Camporesi, Xingzhong Liu, Sunita ChamyuangAbstract:Anthostomella has long been regarded as a large, but polyphyletic genus in the family Xylariaceae, but species in this group generally lack phylogenetic data. In this study, 14 anthostomella-like taxa collected from Italy, were studied using both morphology and molecular data. Single ascospore isolates were obtained and the asexual morphs of five taxa established. The phylogenetic relationships of the xylariaceous taxa were inferred using combined ITS, RPB2, β tubulin and LSU gene regions. We introduce new sequence data for 24 with included the 14 new anthostomella-like taxa. The subfamilies Hypoxyloideae and Xylarioideae within Xylariaceae were recognized as the two major clades with high bootstrap support. Within the two clades 21 subclades were resolved and the anthostomella-like taxa clustered in five of these subclades indicating that the genus is polyphyletic. Anthostomella sensu stricto comprised A. forlicesenica, A. formosa, A. helicofissa, A. rubicola and A. obesa. The A. formosa and A. rubicola collections morphologically closely resemble the type specimens and therefore we designate reference specimens. Three new species Anthostomella helicofissa, A. forlicesenica and A. obesa are also introduced. Four distinct lineages of anthostomella-like taxa correspondent to four new genera, Anthocanalis, Brunneiperidium, Lunatiannulus and Pyriformiascoma, which are also introduced, while one clustered in Astrocystis and is introduced as a new species. Keys to the new anthostomella-like genera and species examined in this study are provided.
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sporothriolide derivatives as chemotaxonomic markers for hypoxylon monticulosum
Mycology, 2014Co-Authors: Frank Surup, Eric Kuhnert, Jacques Fournier, Kevin D Hyde, Simone Heitkamper, Erik Lehmann, Marc StadlerAbstract:During the course of a screening for novel anti-infective agents from cultures of tropical Xylariaceae originating from French Guiana and Thailand, pronounced antifungal activity was noted in extracts of cultures of Hypoxylon monticulosum. A bioassay-guided fractionation led to the known metabolite sporothriolide as active principle. In addition, three new derivatives of sporothriolide were isolated, for which we propose the trivial names sporothric acid, isosporothric acid and dihydroisosporothric acid. Their chemical structures were elucidated by high-resolution electrospray mass spectrometry in conjunction with two-dimensional nuclear magnetic resonance (2D-NMR) spectroscopy. From earlier studies on the biogenesis of the chemically similar canadensolides, we postulate that the new compounds were shunt products, rather than biogenetic precursors of sporothriolide. Interestingly, this compound class, as well as strong antifungal activities, was only observed in multiple cultures of H. monticulosum, but n...
Jacques Fournier - One of the best experts on this subject based on the ideXlab platform.
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sporothriolide derivatives as chemotaxonomic markers for hypoxylon monticulosum
Mycology, 2014Co-Authors: Frank Surup, Eric Kuhnert, Jacques Fournier, Kevin D Hyde, Simone Heitkamper, Erik Lehmann, Marc StadlerAbstract:During the course of a screening for novel anti-infective agents from cultures of tropical Xylariaceae originating from French Guiana and Thailand, pronounced antifungal activity was noted in extracts of cultures of Hypoxylon monticulosum. A bioassay-guided fractionation led to the known metabolite sporothriolide as active principle. In addition, three new derivatives of sporothriolide were isolated, for which we propose the trivial names sporothric acid, isosporothric acid and dihydroisosporothric acid. Their chemical structures were elucidated by high-resolution electrospray mass spectrometry in conjunction with two-dimensional nuclear magnetic resonance (2D-NMR) spectroscopy. From earlier studies on the biogenesis of the chemically similar canadensolides, we postulate that the new compounds were shunt products, rather than biogenetic precursors of sporothriolide. Interestingly, this compound class, as well as strong antifungal activities, was only observed in multiple cultures of H. monticulosum, but n...
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a polyphasic taxonomy of daldinia Xylariaceae
Studies in Mycology, 2014Co-Authors: Marc Stadler, Jacques Fournier, Thomas Læssøe, Cony Decock, Beata Schmieschek, Hansvolker Tichy, Derek PeršohAbstract:For a monograph based on a polythetic concept, several thousands of herbarium specimens, and several hundreds of freshly collected and cultured specimens of Daldinia and allied Xylariaceae, originating from around the world, were studied for morphological traits, including by SEM, and chemically by HPLC profiles using UVvisible and mass spectrometric detection. Emphasis was given to tropical material, and importantly, ancient specimens, including as many types as possible, were tracked and studied to review earlier taxonomic concepts. An epitype of D. eschscholtzii was selected as representative of the morphochemotype that is most widely distributed in the tropics. Six new species of Daldinia from the tropics and the southern Hemisphere are described. Daldinia asphalatum is resurrected, and D. cudonia is regarded as its synonym. In addition, the following binomials are epi-, iso-, neo- and/or lectotypified: Daldinia asphalatum, D. caldariorum, D. clavata, D. cuprea, D. durissima, D. eschscholtzii,D. grandis, D. loculata, and D. vernicosa. Annellosporium and Versiomyce are regarded as synonyms of Daldinia. Many new synonymies in Daldinia are proposed, and some previously published names are rejected. In total, 47 taxa in Daldinia are recognised and a key is provided. Their biogeography, chorology, and ecology, as well as the importance of their secondary metabolites, are also discussed. The previous definition of the genus is emended. The species concept is based mainly on morphological and other phenotype-derived characters because, despite diligent search, no molecular data or cultures of several of the accepted species could be obtained. Daldinia is segregated into five major groups, based on phenotypic characteristics. Some unnamed but aberrant specimens were not found in good condition and are therefore not formally described as new species. However, they are illustrated in detail in a hope that this will facilitate the discovery of fresh material in future. A preliminary molecular phylogeny based on 5.8S/ITS nrDNA including numerous representatives of all hitherto described taxa for which cultures are extant, was found basically in agreement with the above mentioned segregation of the genus, based on morphological and chemotaxonomic evidence. In the rDNA based phylogenetic tree, Daldinia appears clearly distinct from members of the genera Annulohypoxylon and Hypoxylon; nevertheless, representatives of small genera of predominantly tropical origin (Entonaema, Phylacia, Ruwenzoria, Rhopalostroma, Thamnomyces) appear to have evolved from daldinioid ancestors and are nested inside the Daldinia clade. Interestingly, these findings correlate with chemotaxonomic characters to a great extent, especially regarding the distribution of marker metabolites in their mycelial cultures. Hence, the current study revealed for the first time that fungal secondary metabolite profiles can have taxonomic value beyond the species rank and even coincide with phylogenetic data.
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hypoxyvermelhotins a c new pigments from hypoxylon lechatii sp nov
Fungal Biology, 2014Co-Authors: Eric Kuhnert, Jacques Fournier, Simone Heitkamper, Frank Surup, Marc StadlerAbstract:A new species of Hypoxylon was discovered, based on material collected in French Guiana and recognised on the basis of new combination of morpholological characters in comparison with type and authentic material of macroscopically similar taxa. These findings were corroborated by the rather isolated positions of its ITS-nrDNA and beta-tubulin DNA sequences in molecular phylogenies. However, the most salient feature of this fungus only became evident by a comparison of its stromatal HPLC profile, revealing several secondary metabolites that were hitherto not observed in stromata of any other member of the Xylariaceae. Part of the stromata were subsequently extracted to isolate these apparently specific components, using preparative chromatography. Five metabolites were obtained in pure state, and their chemical structures were elucidated by means of high resolution mass spectrometry and nuclear magnetic resonance spectroscopy. They turned out to be tetramic acid derivatives of the so-called vermelhotin type. Aside from vermelhotin, previously isolated from cultures of endophytic fungi, we identified three novel congeners, for which the trivial names hypoxyvermelhotins A–C were proposed. Like vermelhotin, they constitute orange-red pigments and a preliminary biological characterisation revealed them to have rather strong cytotoxic and moderate to weak antimicrobial effects. These results further illustrate the high diversity of unique secondary metabolites in stromata of the hypoxyloid Xylariaceae, a family in which biological diversity seems to parallel the chemical diversity of their bioactive principles to a great extent.
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the Xylariaceae as model example for a unified nomenclature following the one fungus one name 1f1n concept
Mycology, 2013Co-Authors: Marc Stadler, Eric Kuhnert, Derek Peršoh, Jacques FournierAbstract:The introduction of a One Fungus-One Name (1F1N) concept has led to intensive discussions among taxonomists. Based on the Xylariaceae, a hyperdiverse family of Ascomycota with over 1300 species, the advantages and pitfalls of these nomenclatural changes and their consequences for taxonomy and applied mycology are discussed. Historically, in the Xylariaceae, an 1F1N concept had already been realised: the types of all important genera are conserved. Most teleomorphs were discovered long before the anamorphic states and the latter did not receive separate names, hence no drastic taxonomic changes are expected. The new nomenclature calls for abandonment of some ill-defined anamorph genera, such as Muscodor. Other anamorph genera will be retained because their names refer to morphological symplesiomorphies that occur in several teleomorph genera. Various important taxa are only known from ancient specimens, and no DNA-based data are available. Much work still remains to be done to recollect these fungi, select...
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lepraric acid derivatives as chemotaxonomic markers in hypoxylon aeruginosum chlorostroma subcubisporum and c cyaninum sp nov
Fungal Biology, 2010Co-Authors: Thomas Læssøe, Barbel Kopcke, Prasert Srikitikulchai, Jacques Fournier, Marc StadlerAbstract:Abstract Hypoxylon aeruginosum ( Xylariaceae ), an infrequently encountered predominantly tropical pyrenomycete, of which two varieties are known to science, is characterised by having a cyan blue stromatal surface or subsurface. In the course of our ongoing chemotaxonomic evaluation of the Xylariaceae , specific profiles of H. aeruginosum were observed by high performance liquid chromatography, coupled with diode array detection and mass spectrometry ( hplc -DAD/MS). By comparison with an authentic standard, lepraric acid and several yet unidentified metabolites with similar hplc -DAD/MS characteristics were detected in the stromata of the type material and other specimens of this species. Interestingly, lepraric acid was hitherto only known from lichenised ascomycetes. Hypoxylon aeruginosum , which is here reported first from Africa and Asia, contained none of the metabolites that were previously detected in other Xylariaceae , except for stromata growing hyperparasitically on other Hypoxylon species. A different lepraric acid derivative was also detected in the type specimen of Chlorostroma subcubisporum , which differs from H. aeruginosum by having a green stromatal surface, cuboid ascospores, and in lacking an amyloid ascal apical apparatus. A second species of Chlorostroma , which showed essentially the same metabolite profile as H. aeruginosum , is described from Thailand. We conclude that Chlorostroma and H. aeruginosum are closely related. However, no taxonomic conclusions are drawn from these findings because no cultures have so far become available to study their anamorphic morphology, their secondary metabolites in culture, and their molecular phylogeny. Taxonomic novelty: Chlorostroma cyaninum Laessoe, Srikitikulchai & J. Fournier, sp. nov.
Kevin D Hyde - One of the best experts on this subject based on the ideXlab platform.
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elucidation of the life cycle of the endophytic genus muscodor and its transfer to induratia in induratiaceae fam nov based on a polyphasic taxonomic approach
Fungal Diversity, 2020Co-Authors: Milan C Samarakoon, Christopher Lambert, Kevin D Hyde, Benjarong Thongbai, Mark Bronstrup, Ulrike Beutling, Andrew N Miller, Jiankui Liu, Itthayakorn PromputthaAbstract:Molecular phylogenetic studies of cultures derived from some specimens of plant-inhabiting Sordariomycetes using ITS, LSU, rpb2 and tub2 DNA sequence data revealed close affinities to strains of Muscodor. The taxonomy of this biotechnologically important genus, which exclusively consists of endophytes with sterile mycelia that produce antibiotic volatile secondary metabolites, was based on a rather tentative taxonomic concept. Even though it was accommodated in Xylariaceae, its phylogenetic position had so far remained obscure. Our phylogeny shows that Muscodor species have affinities to the xylarialean genera Emarcea and Induratia, which is corroborated by the fact that their sexual states produce characteristic apiospores. These data allow for the integration of Muscodor in Induratia, i.e. the genus that was historically described first. The multi-locus phylogenetic tree clearly revealed that a clade comprising Emarcea and Induratia forms a monophylum separate from representatives of Xylariaceae, for which we propose the new family Induratiaceae. Divergence time estimations revealed that Induratiaceae has been diverged from the Xylariaceae + Clypeosphaeriaceae clade at 93 (69–119) million years ago (Mya) with the crown age of 61 (39–85) Mya during the Cretaceous period. The ascospore-derived cultures were studied for the production of volatile metabolites, using both, dual cultures for assessment of antimicrobial effects and extensive analyses using gas chromatography coupled with mass spectrometry (GC–MS). The antimicrobial effects observed were significant, but not as strong as in the case of the previous reports on Muscodor species. The GC–MS results give rise to some doubt on the validity of the previous identification of certain volatiles. Many peaks in the GC–MS chromatograms could not be safely identified by database searches and may represent new natural products. The isolation of these compounds by preparative chromatography and their subsequent characterisation by nuclear magnetic resonance (NMR) spectroscopy or total synthesis will allow for a more concise identification of these volatiles, and they should also be checked for their individual contribution to the observed antibiotic effects. This will be an important prerequisite for the development of biocontrol strains.
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vamsapriya yunnana a new species of vamsapriya Xylariaceae xylariales associated with bamboo from yunnan china
Phytotaxa, 2018Co-Authors: Hongbo Jiang, Ali H. Bahkali, Rungtiwa Phookamsak, Darbhe J Bhat, Sehroon Khan, Abdallah M Elgorban, Kevin D HydeAbstract:Vamsapriya yunnana sp. nov., collected from dead bamboo in Yunnan Province of China, is described and illustrated in this paper. The new taxon is characterized by synnematous conidiophores, with enteroblastic, monotretic conidiogenous cells and brown to dark brown, 4–9-septate, fusiform conidia with a long, apical, appendage-like region. The species differs from the type and other species in the genus in having a wider fertile region and rostrate apex of the conidia. Maximum likelihood and Bayesian inference analyses of a combined ITS, LSU and RPB2 DNA sequence dataset show that V. yunnana is a new species, belonging to the genus Vamsapriya in Xylariaceae.
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towards a natural classification and backbone tree for graphostromataceae hypoxylaceae lopadostomataceae and Xylariaceae
Fungal Diversity, 2018Co-Authors: Esteban Benjamin Sir, Dinushani A Daranagama, Kevin D Hyde, Kasun M Thambugala, Qing Tian, Milan C Samarakoon, Eric H C Mckenzie, Subashini C Jayasiri, Saowaluck TibprommaAbstract:Species and generic recognition in the order Xylariales has been uncertain due to lack of molecular data from authentic cultures, as well as overlapping morphological characteristics. In this study, we revise the families Graphostromataceae, Hypoxylaceae, Lopadostomataceae and Xylariaceae in Xylariales. Our study is based on DNA sequence data derived from living cultures of fresh isolates, data from GenBank and morphological observation of type and worldwide herbarium specimens. We also collected new specimens from Germany, Italy and Thailand. Combined analyses of ITS, LSU, RPB2 and β-tubulin sequence data were used to reconstruct the molecular phylogeny of the above families. Generic and familiar boundaries between these families are revised and presented in an updated combined phylogenetic tree. We accept six genera in Graphostromataceae, 19 genera in Hypoxylaceae, four in Lopadostomataceae and 37 genera in Xylariaceae. Five genera previously treated in Xylariaceae are placed in Amphisphaeriales genera incertae sedis and seven genera are placed in Xylariales genera incertae sedis. Two genera are placed in Sordariomycetes genera incertae sedis, while four genera are placed as Xylariomycetidae genera incertae sedis. Three genera are considered as doubtful. Barrmaelia and Cannonia, presently included in Xylariaceae are transferred to Diatrypaceae and Coniochaetales respectively, based on their morphology and phylogeny. Areolospora and Myconeesia are excluded from Xylariaceae and synonymized with Phaeosporis and Anthostomella respectively. Updated descriptions and illustrations are provided for all taxa with notes provided on each genus. Excluded and doubtful genera are listed with notes on their taxonomy and phylogeny. Taxonomic keys are provided for all revised families with morphological details for genera within the families.
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anthostomelloides krabiensis gen et sp nov Xylariaceae from pandanus odorifer pandanaceae
Turkish Journal of Botany, 2017Co-Authors: Saowaluck Tibpromma, Dinushani A Daranagama, Saranyaphat Boonmee, Itthayakorn Promputtha, Sureeporn Nontachaiyapoom, Kevin D HydeAbstract:An Anthostomella-like taxon was obtained from Pandanus odorifer (Forssk.) Kuntze (Pandanaceae) collected in Krabi Province in Thailand. Morphological data plus phylogenetic analyses of combined ITS, LSU, RPB2, and beta-tubulin sequence data clearly separate this Anthostomella-like taxon from other known genera in Xylariaceae. In this paper, we introduce this taxon as a new genus, Anthostomelloides, in the family Xylariaceae, with A. krabiensis as the type. A detailed morphological description, phylogenetic tree, photomicrographs of A. krabiensis, keys to Anthostomella-like genera, and a comparison of A. krabiensis with the morphologically similar taxa in Xylariaceae are provided.
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truncatones a d benzo j fluoranthenes from annulohypoxylon species Xylariaceae ascomycota
Tetrahedron, 2016Co-Authors: Enge Sudarman, Eric Kuhnert, Esteban Benjamin Sir, Kevin D Hyde, Frank Surup, Marc StadlerAbstract:Abstract From stromata (fruiting bodies) of three xylariaceous fungi belonging to the genus Annulohypoxylon (A. leptascum, A. cf. truncatum and an unidentified Annulohypoxylon sp.), truncatone A (1), three unprecedented derivatives named truncatones B–D (2–4) besides the known 4,5,4′,5′-tetrahydroxy-1,1′-binaphthyl (BNT, 5), hypoxylonol C (6) and hypoxylonol F (7) were isolated. Planar structures of the new benzo[j]fluoranthene derivatives 2–4 were determined on the basis of NMR and HRESIMS data. While the relative configuration of 4 was demonstrated by ROESY NMR data and 1H,1H coupling constants, absolute configurations of 1, 2, 4 were determined by CD spectroscopy. Compounds 1, 3 and 4 exhibited cytotoxicity against the mouse fibroblast cell line L929.
Adriana I Hladki - One of the best experts on this subject based on the ideXlab platform.
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new species and reports of hypoxylon from argentina recognized by a polyphasic approach
Mycological Progress, 2016Co-Authors: Eric Kuhnert, Christopher Lambert, Adriana I Hladki, Andrea I Romero, Marc StadlerAbstract:A preliminary account of Hypoxylon species (Xylariaceae) from the hitherto widely unexplored “Yungas” mountain forests of Northwest Argentina is presented. Two new species are described based on extensive morphological, molecular (ITS region of rDNA, partial β-tubulin gene) and chemotaxonomic data. Hypoxylon spegazzinianum is close to H. erythrostroma, but differs by larger ascospores and a virgariella-like asexual morph. Hypoxylon calileguense resembles H. subgilvum when growing on wood, but can be distinguished by larger ascospores and a fawn to brick stromatal surface colour. Stromata found on bark have affinities to H. pelliculosum, but differ in their stromatal surface colour and conspicuous amyloid apical apparatus. In addition, nine taxa of Hypoxylon are reported for Argentina for the first time, and some details on their asexual state and stromatal secondary metabolites are reported. An updated dichotomous key for Hypoxylon species from Argentina is provided.
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stilbohypoxylon quisquiliarum ascomycota Xylariaceae nueva cita para la argentina
Darwiniana (Argentina) Num.2 Vol.1, 2015Co-Authors: Esteban Benjamin Sir, Teresa C Perera, Andrea Irene Romero, Adriana I HladkiAbstract:tilbohypoxylon quisquiliarum var. quisquiliarum se cita por primera vez para la micobiota argentina. Se describe e ilustra el teleomorfo y anamorfo. Se registran por primera vez los sinemas creciendo en su habitat natural. Se presenta una clave dicotomica de las especies de Stilbohypoxylon halladas hasta ahora en la Argentina y un mapa con su distribucion en el pais.
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stilbohypoxylon quisquiliarum ascomycota Xylariaceae nueva cita para la argentina
Darwiniana, 2013Co-Authors: Esteban Benjamin Sir, Teresa C Perera, Andrea Irene Romero, Adriana I HladkiAbstract:Stilbohypoxylon quisquiliarum var. quisquiliarum is a new record for the Argentinean mycobiota. We describe and illustrate the teleomorph and anamorph. The synnemata are recorded for the first time in its natural habitat. A dichotomous key to Stilbohypoxylon taxa so far known from Argentina and a distribution map are presented.
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novedades para el genero rosellinia ascomycota Xylariaceae en el noroeste de la republica argentina
Boletin de la Sociedad Argentina de Botanica, 2012Co-Authors: Esteban Benjamin Sir, Teresa C Perera, Andrea Irene Romero, Adriana I HladkiAbstract:Summary: Novelties for the genus Rosellinia (Ascomycota-Xylariaceae) from Northwest of Argentina. Rosellinia canzacotoana is reported for the first time in the southern Cone of America and Rosellinia arcuata is a new record from Argentina. Rosellinia necatrix is reported growing on a native host of the Argentine flora. Three Spegazzini’s holotypes: Rosellinia australis, Rosellinia bonaerensis and Rosellinia smilacina were studied and their taxonomic and nomenclatural positions are discussed. A dichotomous key to rosellinoid taxa so far known from Northwest Argentina and distributions maps is presented.
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novedades para los generos annulohypoxylon e hypoxylon ascomycota Xylariaceae en la republica argentina
Darwiniana, 2009Co-Authors: Adriana I Hladki, Andrea I RomeroAbstract:Hladki, A. I. & A. I. Romero. 2009. Novelties for the genera Annulohypoxylon and Hypoxylon (Ascomy- cota, Xylariaceae) from Argentina. Darwiniana 47(2): 278-288. Two new varieties, Annulohypoxylon moriforme var. macrosporum and Hypoxylon investiens var. magnisporum are proposed; Annulohypoxylon nitens, Hypoxylon crocopeplum, H. subrutilum and H. rubiginosum var. microsporum are described as new records from Argentina. A dichotomous key to hypoxyloid taxa so far known from Argentina is presented.
Hiroshi Takeda - One of the best experts on this subject based on the ideXlab platform.
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comparison of litter decomposing ability among diverse fungi in a cool temperate deciduous forest in japan
Mycologia, 2002Co-Authors: Takashi Osono, Hiroshi TakedaAbstract:The litter decomposing ability of 79 fungal isolates (41 genera, 60 species) was assessed with the pure culture decomposition test. The isolates were collected qualitatively in a cool temperate deciduous forest in Japan during a 21-mo period. Loss of original weight of sterilized litter ranged from 0.1% to 57.6%. Six isolates in the Basidiomycota caused high weight losses ranging from 15.1% to 57.6%. Fourteen isolates in Xylaria and Geniculosporium (the Xylariaceae and its anamorph) also caused high weight losses ranging from 4.0% to 14.4%. Other isolates in the Ascomycota and associated anamorphs and in the Zygomycota caused low weight losses on mean. Six fungi in the Basidiomycota, and all in the Xylariaceae showed a bleaching activity of the litter and caused lignin and carbohydrate decomposition. Mean lignin/weight loss ratios (L/W) and lignin/carbohydrate loss ratios (L/C), were 0.9 and 0.7 for the Basidiomycota and 0.7 and 0.4 for the Xylariaceae, respectively. Significant differences were found in ...
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comparison of litter decomposing ability among diverse fungi in a cool temperate deciduous forest in japan
Mycologia, 2002Co-Authors: Takashi Osono, Hiroshi TakedaAbstract:The litter decomposing ability of 79 fungal isolates (41 genera, 60 species) was assessed with the pure culture decomposition test. The isolates were collected qualitatively in a cool temperate deciduous forest in Japan during a 21-mo period. Loss of original weight of sterilized litter ranged from 0.1% to 57.6%. Six isolates in the Basidiomycota caused high weight losses ranging from 15.1% to 57.6%. Fourteen isolates in Xylaria and Geniculosporium (the Xylariaceae and its anamorph) also caused high weight losses ranging from 4.0% to 14.4%. Other isolates in the Ascomycota and associated anamorphs and in the Zygomycota caused low weight losses on mean. Six fungi in the Basidiomycota, and all in the Xylariaceae showed a bleaching activity of the litter and caused lignin and carbohydrate decomposition. Mean lignin/weight loss ratios (L/W) and lignin/carbohydrate loss ratios (L/C), were 0.9 and 0.7 for the Basidiomycota and 0.7 and 0.4 for the Xylariaceae, respectively. Significant differences were found in L/W and L/C between the two groups when the result of Xylaria sp. that showed marked delignification was excluded. These differences in lignin and carbohydrate utilization patterns are discussed in relation to the structural and the chemical properties of the decomposed litter and to the implications for organic chemical changes during litter decomposition processes.
