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Glomus compressum, a new arbuscular mycorrhizal fungus from different agro-ecosystems in Central Europe

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A new arbuscular mycorrhizal (AM) fungus, Glomus compressum, was isolated from several agricultural systems all over Switzerland, southwestern Germany and northeastern France. It was also cultivated in trap cultures and in a monosporic pot culture using Hieracium pilosella as host plant. The new fungus differentiates golden-yellow to yellow brown, bi-layered spores, (50–)68–94(–103) μm in diameter, formed singly, in small clusters of 2–10 spores or in loose non-organized sporocarps with up to 34–50 spores. Glomus compressum can be distinguished from all other glomeromycotean fungal species by the combination of spore size and color, non-staining in Melzer's reagent, and its subtending hyphae that generally form a narrow, often irregular pore channel up to 5–40 μm long from the spore base. Phylogenetically, it forms a distinct clade within the Glomeraceae. The fungus is a good example for an AM fungus that could first be described unequivocally after a monosporic culture had successfully been established.
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Keywords: ARABLE LANDS; ARBUSCULAR MYCORRHIZAL FUNGI; BIODIVERSITY; GLOMEROMYCETES; GRASSLANDS; PHYLOGENY

Document Type: Research Article

Publication date: November 1, 2014

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  • Nova Hedwigia is an international journal publishing original, peer-reviewed papers on current issues of taxonomy, morphology, ultrastructure and ecology of all groups of cryptogamic plants, including cyanophytes/cyanobacteria and fungi. The half-tone plates in Nova Hedwigia are known for their high quality, which makes them especially suitable for the reproduction of photomicrographs and scanning and transmission electron micrographs.
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