| 1. |
- Hallenberg, Nils, 1947, et al.
(author)
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Pseudolagarobasidium (Basidiomycota): on the reinstatement of a genus of parasitic, saprophytic, and endophytic resupinate fungi
- 2008
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In: Botany. - 1916-2804. ; 86:11, s. 1319-1325
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Journal article (peer-reviewed)abstract
- The small resupinate genus Pseudolagarobasidium (Polyporales, Basidiomycota) presently comprises less than five species, all of which were described from tropical to subtropical regions, and two of which are root parasites on leguminous trees. The genus has recently been synonymized with Radulodon on morphological grounds, and the present study evaluates this proposal in a molecular context. Pseudolagarobasidium was found to constitute a well supported, monophyletic group excluding Radulodon and this synonymy is rejected. The ecological range of the genus spans saprotrophy to parasitism, and this study presents evidence that at least one lineage in Pseudolagarobasidium is endophytic in the cacao tree (Theobroma cacao L.). Key words: Polyporales, Radulodon, phylogeny, plant interactions. Résumé: Le Pseudolagarobasidium (Polyporales, Basidiomycota) constitue un genre de petits champignons résupinés qui comporte actuellement cinq espèces, toutes décrites à partir de régions tropicales ou subtropicales, incluant deux espèces parasites des racines d'arbres de la famille des légumineuses. On en a récemment établi la synonymie avec le genre Radulodon sur la base morphologique, mais les auteurs utilisent ici l'approche moléculaire. On constate que le genre Pseudolagarobasidium constitue un groupe monophylétique robuste excluant les Radulodon ce qui conduit au rejet de cette synonymie. L'amplitude écologique du genre va du saprophytisme au parasitisme, et on présente des preuves qu'au moins une lignée est un endophyte du cacaoyer (Theobroma cacao L.). Mots-clés : Polyporales, Radulon, phylogénie, interactions végétales.
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| 2. |
- Hallenberg, Nils, 1947, et al.
(author)
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The Peniophorella praetermissa species complex (Basidiomycota)
- 2007
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In: Mycological Research. - : Elsevier BV. - 0953-7562. ; 111:12, s. 1366-1376
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Journal article (peer-reviewed)abstract
- The corticioid basidiomycete Peniophorella praetermissa has long been regarded as a morphologically variable species complex. An ITS-based phylogenetic study based on a worldwide sampling was carried out using parsimony and Bayesian inference. The resulting trees feature three major clades, further divided into well-supported subclades. These could be considered as distinct species, a contention that is further supported by crossing test data. Only two out of the eight phylogenetic lineages identified can be distinctly morphologically characterized: P. odontiaeformis and P. subpraetermissa. P. odontiaeformis is an odontioid species with a paleotropical distribution whereas the taxa in the remaining subclades have smooth basidiomata and are distributed in temperate areas. P. subpraetermissa is known only from the type collection and is distinguished microscopically by its reddish brown apically encrustated cystidia. Taxa in the remaining subclades are impossible to distinguish from each other morphologically, and therefore, are viewed as a species complex, P. praetermissa s. lat. One of the subclades, which is widely distributed but restricted to the Northern hemisphere, is proposed to represent P. praetermissa s. str. An epitype is selected from the same area as the holotype, among the specimens studied here. However, the geographically most widespread clade with many representatives from both hemispheres is here referred to as P. pertenuis, a taxon that was previously considered a synonym to P. praetermissa.
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