Theissenia reconsidered, including molecular phylogeny of the type species T. pyrenocrata and a new genus Durotheca (Xylariaceae, Ascomycota)

Læssøe, Thomas; Srikitikulchai, Prasert; Jj, D Luangsa-Ard; Stadler, Marc

doi:10.5598/imafungus.2013.04.01.07

Cited by 22 publications

(13 citation statements)

References 27 publications

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“…The phylogeny based on BTUB showed longer distances between species and higher support values. This locus was the most informative of the three gene regions studied, which is in agreement with previous studies in other xylariaceous genera ( Hsieh et al 2005 , Læssøe et al 2013 ). After this revision Microdochium s.str.…”

Section: Discussionsupporting

confidence: 91%

Taxonomic and phylogenetic re-evaluation of Microdochium, Monographella and Idriella

2016

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Based on morphology and DNA sequence data the taxonomic relationships of Microdochium, Monographella and Idriella were reassessed. Microdochium is morphologically and phylogenetically circumscribed, and the sexual genus Monographella treated as synonym on the basis that Microdochium has more species, is more commonly encountered, and more frequently used in literature. An epitype is designated for Microdochium phragmites, and several well-known species are redefined based on their morphology and DNA sequence data (LSU, ITS, BTUB and RPB2). Furthermore, the revision of Microdochium led to six new combinations (M. albescens, M. consociatum, M. fusariisporum, M. maydis, M. opuntiae and M. stevensonii) and six new species (M. citrinidiscum, M. colombiense, M. fisheri, M. neoqueenslandicum, M. seminicola and M. trichocladiopsis) being proposed. Microdochium s.str. belongs to a monophyletic clade, together with Idriella lunata and Selenodriella, representing a new family, Microdochiaceae, in Xylariales. Other species previously accommodated in Microdochium belong to different orders in the Ascomycota. Microdochium gracile belongs to Sordariomycetes (incertae sedis) and Paramicrodochium is proposed to accommodate this species. Microdochium tripsaci belongs to Ephelis in Clavicipitaceae, while M. fusarioides belongs to a new genus, Microdochiella in Orbiliales. Idriella s.str. is a monotypic genus phylogenetically closely related to Microdochium. Idriella s.l. separates into different genera in Xylariales (incertae sedis) including Castanediella, Selenodriella, Idriellopsis, Neoidriella and Paraidriella, the last three proposed here as new genera.

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Section: Discussionsupporting

confidence: 91%

Taxonomic and phylogenetic re-evaluation of Microdochium, Monographella and Idriella

2016

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“…However, the molecular phylogenetic data generated from the original sporothriolide producer strain clearly revealed it to belong to the Hypocreales. Aside from the above cited papers on hypoxyloid genera, even the strains obtained by Bills et al ( 2012 ), Fournier, Köpcke, et al ( 2010 ), Fournier, Stadler et al ( 2010 ), Fournier et al ( 2011 ), Læssøe et al ( 2013 ), Persoh et al ( 2009 ) were all checked for antifungal effects and by chemotaxonomic methodology, but no sporothriolide was detected by HPLC–MS and prominent antifungal effects of the Xylaria sp. studied were always due to the overproduction of cytochalasins and other compounds.…”

Section: Discussionmentioning

confidence: 99%

Sporothriolide derivatives as chemotaxonomic markers forHypoxylon monticulosum

et al. 2014

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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 not in several hundreds of Hypoxylon cultures studied previously or concurrently. Therefore, sporothriolide production may constitute a species-specific feature with respect to Hypoxylon and the Xylariaceae, although the compound was previously reported from non-related fungal taxa.

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“…The anamorph of D. comedens was described by Ju et al (2003) to be nodulisporium-like, but they observed rather long slender conidia that are somewhat reminiscent of scolecospores. Interestingly, the stromata of Durotheca comedens were found to contain lepraric acids, which is indicative of chemotaxonomic affinities t o Chlorostroma and Hypoxylon aeruginosum (Laessøe et al (2013 Note: The phylogenetic position of the type species of this monotypic genus is close to that of Pyriformiascoma. It has typical xylarioid ascospores and its asci are lacking an amyloid apical apparatus, but no anamorphic structures were observed (Dai et al 2016).…”

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confidence: 95%

“…Notes: This genus appears heterogeneous even after the segregation of Durotheca by Laessøe et al (2013) with respect to both teleomorph and anamorph morphology. The phylogeny of Ju et al (2007) based on protein coding genes suggests affinities to both Biscogniauxia (Graphostromataceae) and Whalleya (Lopadostomataceae).…”

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confidence: 99%

Resurrection and emendation of the Hypoxylaceae, recognised from a multigene phylogeny of the Xylariales

et al. 2017

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A multigene phylogeny was constructed, including a significant number of representative species of the main lineages in the Xylariaceae and four DNA loci the internal transcribed spacer region (ITS), the large subunit (LSU) of the nuclear rDNA, the second largest subunit of the RNA polymerase II (RPB2), and beta-tubulin (TUB2). Specimens were selected based on more than a decade of intensive morphological and chemotaxonomic work, and cautious taxon sampling was performed to cover the major lineages of the Xylariaceae; however, with emphasis on hypoxyloid species. The comprehensive phylogenetic analysis revealed a clear-cut segregation of the Xylariaceae into several major clades, which was well in accordance with previously established morphological and chemotaxonomic concepts. One of these clades contained Annulohypoxylon, Hypoxylon, Daldinia, and other related genera that have stromatal pigments and a nodulisporium-like anamorph. They are accommodated in the family Hypoxylaceae, which is resurrected and emended. Representatives of genera with a nodulisporium-like anamorph and bipartite stromata, lacking stromatal pigments (i.e. Biscogniauxia, Camillea, and Obolarina) appeared in a clade basal to the xylarioid taxa. As they clustered with Graphostroma platystomum, they are accommodated in the Graphostromataceae. The new genus Jackrogersella with J. multiformis as type species is segregated from Annulohypoxylon. The genus Pyrenopolyporus is resurrected for Hypoxylon polyporus and allied species. The genus Daldinia and its allies Entonaema, Rhopalostroma, Ruwenzoria, and Thamnomyces appeared in two separate subclades, which may warrant further splitting of Daldinia in the future, and even Hypoxylon was divided in several clades. However, more species of these genera need to be studied before a conclusive taxonomic rearrangement can be envisaged. Epitypes were designated for several important species in which living cultures and molecular data are available, in order to stabilise the taxonomy of the Xylariales.

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Theissenia reconsidered, including molecular phylogeny of the type species T. pyrenocrata and a new genus Durotheca (Xylariaceae, Ascomycota)

Cited by 22 publications

References 27 publications

Taxonomic and phylogenetic re-evaluation of <I>Microdochium, Monographella</I> and <I>Idriella</I>

Taxonomic and phylogenetic re-evaluation of <I>Microdochium, Monographella</I> and <I>Idriella</I>

Sporothriolide derivatives as chemotaxonomic markers forHypoxylon monticulosum

Resurrection and emendation of the Hypoxylaceae, recognised from a multigene phylogeny of the Xylariales

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