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Stadler, Marc, Hartmund Wollweber & Jacques Fournier. A host-specific species of Hypoxylon from France, and notes on the chemotaxonomy of the 'Hypoxylon rubiginosum complex.' Mycotaxon 90: 187-211. 2004.

ABSTRACT: Hypoxylon petriniae sp. nov. is described from a new combination of morphological characters of its teleomorph and anamorph. It was found in France and other countries of Western and Central Europe, mostly colonising Fraxinus excelsior. Its status is supported by a chemotaxonomic study by analytical HPLC profiling with diode array and mass spectrometric detection of secondary metabolites in several Hypoxylon spp. These analyses revealed the presence of binaphthalene tetrol (BNT) as major stromatal metabolite of H. petriniae. This widespread purple stromatal pigment of Xylariaceae was not found in H. rubiginosum, H. cercidicolum, and further, presumably related species. In contrast to H. rubiginosum and H. cercidicolum, H. petriniae was found devoid of mitorubrin. Orsellinic acid and rubiginosins, which are recently identified azaphilone pigments chemically related to mitorubrin were found as common stromatal metabolites of many of the aforementioned taxa, and the occurrence of particular azaphilones appears to be specific for some species. A key to European Hypoxylon spp. is provided.

KEYWORDS: chemotaxonomy, systematics, secondary metabolites

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