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Nitrogen isotope values (δ 15 N) are higher in ectomycorrhizal fungi than in their plant hosts but the wide variability in δ 15 N among sporocarps of different fungal taxa is unexplained. We propose that fungal δ 15 N reflects sequestration of fungal nitrogen to build fungal biomass, and should accordingly reflect fungal exploration strategies and hyphal(More)
Acknowledgements First and foremost I would like to thank my wife Paras for her willingness to sacrifice a normal private life for the sake of research, and her never-ending patience during my field trips, when the two of us were separated for weeks and sometimes months. I am deeply grateful to my supervisor Reinhard Agerer, who didn't just allow me, but(More)
Hygrophorus olivaceoalbus has long been known as an ectomycorrhizal fungus, formerly designated with the artificial binomen Piceirhiza gelatinosa. Recently, it has been found to be abundant and very frequent under double ambient ozone free air fumigation of mature Norway spruce trees. As it has already been reported that this fungus can form intercellular(More)
Tomentella amyloapiculata and T. agbassaensis are described as new species within the genus Tomentella based on materials we collected in the West African, northern Guinean seasonal forests. We used a combination of anatomical characters, sequence analyses and phylogenetic inference of 71 ITS rDNA sequences to characterise the two new species. Anatomically,(More)
A common resupinate thelephoroid fungus was collected in northern Guinean seasonal forests in central and north of Benin (West Africa). The species is reminiscent of Tomentella umbrinospora with respect to the color and thickness of basidiomata and rhizomorphs, the shape of basidiospores in frontal view and the size of subicular hyphae. Both species fall(More)
The present study aims at providing standard values for the exploration type (ET)-specific quantification of extramatrical mycelium (EMM) of ectomycorrhizal fungi applicable to ecological field studies. These values were established from mycelial systems of ectomycorrhizae (ECM) synthesized in rhizotrons with near-to-natural peat substrate. Based on image(More)
We used a combination of molecular-phylogenetic inference of 82 ITS rDNA sequences and anatomical approach to describe three new west African thelephoroid species, namely Tomentella afrostuposa, T. guineensis and T. guinkoi. Anatomically, T. afrostuposa is reminiscent of T. stuposa with globose to broadly ellipsoid large basidiospores of 8–14 μm, long(More)
The genus Ramaria is composed of several subgenera that often correspond to specific trophic strategies. Because carbon and nitrogen isotopes can be used to assess fungal trophic status and nitrogen sources, we accordingly carried out an extensive survey of isotopic patterns in archived specimens of Ramaria from Germany and other locations. Isotopic(More)
Species of Hygrocybe (waxcaps) are mostly colorful mushrooms, which are characteristic of undisturbed grasslands. These fungi are endangered in many places worldwide, but their biology remains a mystery: while isotopic signatures indicate that waxcaps are neither mycorrhizal nor saprotrophic, they were recently observed in plant roots and molecularly(More)
Lactarius s. str. represents a monophyletic group of about 40 species in tropical Africa, although the delimitation of the genus from Lactifluus is still in progress. Recent molecular phylogenetic and taxonomic revisions have led to numerous changes in names of tropical species formerly referred to Lactarius. To better circumscribe the genus Lactarius in(More)