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Villiers en Bois, France

Lechat C.,Ascofrance | Hairaud M.,Impasse des Marroniers
Mycotaxon | Year: 2012

Ijuhya oenanthicola sp. nov. (Bionectriaceae) is described and illustrated based on a collection from Oenanthe crocata (Apiaceae) in France. The Acremonium-like asexual state was obtained in culture. © 2012. Mycotaxon, Ltd.

Lasionectria marigotensis sp. nov. on decaying leaves of Cocos nucifera (Arecaceae) in Guadeloupe and L. martinicensis sp. nov. on dead stems of Passiflora sp. (Passifloraceae) in Martinique are described and illustrated. The acremonium-like asexual state was obtained in culture for both species. An updated key to the species of Lasionectria is provided. © 2012. Mycotaxon, Ltd.

Stadler M.,University of Bayreuth | Stadler M.,InterMed Discovery GmbH | Fournier J.,Las Muros | Laessoe T.,Copenhagen University | And 6 more authors.
Mycoscience | Year: 2010

The tropical genus Thamnomyces is characterized by having wiry, black, brittle stromata and early deliquescent asci, lacking an amyloid apical apparatus. Thamnomyces is regarded as a member of the Xylariaceae because the morphology of its ascospores and the anamorphic structures are typical for this family. However, its relationship to other xylariaceous genera remained to be clarified. Cultures of three Thamnomyces species were obtained and studied for morphological characters, and their secondary metabolite profiles as inferred from high performance liquid chromatography coupled with mass spectrometric and diode array detection (HPLC-MS/DAD) were also compared. Cultures of Thamnomyces closely resembled those of the genera Daldinia and Phylacia and even produced several secondary metabolite families that are known to be chemotaxonomic markers for the aforementioned genera. These findings were corroborated by a comparison of their 5.8S/ITS nrDNA sequences. We conclude that Thamnomyces, Daldinia, and Phylacia are derived from the same evolutionary lineage, despite these genera differing drastically in their stromatal morphology and anatomy. Along with Entonaema and Rhopalostoma, these fungi comprise an evolutionarily derived lineage of the hypoxyloid Xylariaceae. A new species of Thamnomyces is erected, and preliminary descriptions of three further, potentially new taxa are also provided. © 2010 The Mycological Society of Japan and Springer.

Hsieh H.-M.,Academia Sinica, Taiwan | Lin C.-R.,Academia Sinica, Taiwan | Fang M.-J.,Academia Sinica, Taiwan | Rogers J.D.,Washington State University | And 3 more authors.
Molecular Phylogenetics and Evolution | Year: 2010

To infer the phylogenetic relationships of Xylaria species associated with termite nests within the genus Xylaria and among genera of the subfamily Xylarioideae, β-tubulin, RPB2, and α-actin sequences of 131 cultures of 114 species from Xylaria and 11 other genera of the subfamily were analyzed. These 11 genera included Astrocystis, Amphirosellinia, Discoxylaria, Entoleuca, Euepixylon, Kretzschmaria, Nemania, Podosordaria, Poronia, Rosellinia, and Stilbohypoxylon. We showed that Xylaria species were distributed among three major clades, TE, HY, and PO, with clade TE-an equivalent of the subgenus Pseudoxylaria-encompassing exclusively those species associated with termite nests and the other two clades containing those associated with substrates other than termite nests. Xylaria appears to be a paraphyletic genus, with most of the 11 genera submerged within it. Podosordaria and Poronia, which formed a distinct clade, apparently diverged from Xylaria and the other genera early. Species of Entoleuca, Euepixylon, Nemania, and Rosellinia constituted clade NR, a major clade sister to clade PO, while those of Kretzschmaria were inserted within clade HY and those of Astrocystis, Amphirosellinia, Discoxylaria, and Stilbohypoxylon were within clade PO. © 2009 Elsevier Inc.

Berrin J.-G.,French National Institute for Agricultural Research | Berrin J.-G.,Aix - Marseille University | Navarro D.,French National Institute for Agricultural Research | Navarro D.,Aix - Marseille University | And 18 more authors.
Applied and Environmental Microbiology | Year: 2012

In this study, natural fungal diversity in wood-decaying species was explored for biomass deconstruction. In 2007 and 2008, fungal isolates were collected in temperate forests mainly from metropolitan France and in tropical forests mainly from French Guiana. We recovered and identified 74 monomorph cultures using morphological and molecular identification tools. Following production of fungal secretomes under inductive conditions, we evaluated the capacity of these fungal strains to potentiate a commercial Trichoderma reesei cellulase cocktail for the release of soluble sugars from biomass. The secretome of 19 isolates led to an improvement in biomass conversion of at least 23%. Of the isolates, the Trametes gibbosa BRFM 952 (Banque de Ressources Fongiques de Marseille) secretome performed best, with 60% improved conversion, a feature that was not universal to the Trametes and related genera. Enzymatic characterization of the T. gibbosa BRFM 952 secretome revealed an unexpected high activity on crystalline cellulose, higher than that of the T. reesei cellulase cocktail. This report highlights the interest in a systematic high-throughput assessment of collected fungal biodiversity to improve the enzymatic conversion of lignocellulosic biomass. It enabled the unbiased identification of new fungal strains issued from biodiversity with high biotechnological potential. © 2012, American Society for Microbiology. All Rights Reserved.

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