Reinhard Agerer's research while affiliated with Uppsala University and other places

Publications (128)

Article
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Nomenclatural type definitions are one of the most important concepts in biological nomenclature. Being physical objects that can be re-studied by other researchers, types permanently link taxonomy (an artificial agreement to classify biological diversity) with nomenclature (an artificial agreement to name biological diversity). Two proposals to am...
Article
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The genus Lactifluus is one of the common ectomycorrhizal fungal taxa in tropical African forest ecosystems. Recent morphological and anatomical mycological studies based on specimens we sampled from 2007 to 2013 in West African forest ecosystems, including dry, dense, riparian forests and woodlands, enable to assess the diversity and the occurrenc...
Article
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Despite the crucial ecological role of lactarioid taxa (Lactifluus, Lactarius) as common ectomycorrhiza formers in tropical African seasonal forests, their current diversity is not yet adequately assessed. During the last few years, numerous lactarioid specimens have been sampled in various ecosystems from Togo (West Africa). We generated 48 ITS se...
Poster
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Waxcaps represent a non-monophyletic group of fruiting-body forming Basidiomycota in the family Hygrophoraceae. In Europe these mostly colourful mushrooms are typically found in undisturbed or extensively managed grasslands. Due to the decline of their habitats, many species of Hygrophoraceae are endangered worldwide. Their biology remains a myster...
Article
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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 Lactar...
Article
Three anatomotypes of Tuber ectomycorrhizae on Chinese Pine (Pinus tabulaeformis) collected from North China are presented in this study. They all have pseudoparenchymatous outer mantle layers, but differ from each other in the shape of mantle cells and the presence of cystidia. "Pinirhiza pubulata" has angular cells in the outer mantle and abundan...
Article
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Species within the genera Tomentella are among the most important ECM in forests. However, our knowledge about their functional characteristics is still rather limited. The ectomycorrhizae of Tomentella badia on Picea abies are described here in detail and compared to the non-identified ECM Piceirhiza obscura . A pseudoparenchymatous mantle formed...
Article
Species within the genera Tomentella are among the most important ECM in forests. However, our knowledge about their functional characteristics is still rather limited. The ectomycorrhizae of Tomentella badia on Picea abies are described here in detail and compared to the non-identified ECM Piceirhiza obscura. A pseudoparenchymatous mantle formed b...
Article
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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 molecular...
Article
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Macro- and micromorphologic study of two milkcaps from Fazao Malfakassa National Park of Togo is supported by molecular phylogenetic analysis of ITS sequences obtained by the extraction of ribosomal DNA of each sample. This has led to the description of two new Lactifluus species: L. fazaoensis in L. subg. Edules and L. sudanicus in L. subg. Lactif...
Article
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Tomentella minispora and T baroensis are described as new species from West Africa based on anatomical evidence, ITS rDNA sequence analyses and molecular-phylogenetic inference. T minispora is characterized by subglobose to globose small basidiospores with size ranging from 5.5 mu m to 7.5 mu m, short aculei of up to 0.8 mu m and strongly inflated...
Article
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Tomentella badioincrustata and T papuae are described as new species from Papua New Guinea. Tomentella badioincrustata is characterized by the presence of dimitic, slightly differentiated rhizomorphs with smooth chlamydospores (18-25 mu m x 18-20 mu m) on their surface, large incrusted subicular (up to 10 mu m broad) and subhymenial hyphae (up to 7...
Article
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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 8–14μm, lo...
Article
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 interc...
Article
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 o...
Article
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An anatomical approach coupled with molecular phylogeny of 84 sequences of thelephoroid taxa have been used to describe two new West African resupinate Thelephorales, namely, Tomentella agereri and Tomentella maroana. T. agereri presents a maximal sequence similarity of 94% with its genetically closest species, Tomentalla pilosa, according to a Bla...
Presentation
Waxcaps are the most distinctive and visible components of grassland funga in Europe, however many aspects of their ecology are poorly understood. There is still an ongoing debate regarding what exact role waxcaps play in the soil. They have been considered as ectomycorrhizal, however no direct evidence of ectomycorrhizal structures has been report...
Thesis
Waxcaps are the most distinctive and visible components of grassland funga, however many aspects of their ecology are poorly understood. Indirect evidence of the trophic status of waxcaps has being obtained with the use of stable isotopes pointing out waxcaps to be in a biotrophic relation with an unknown partner. In the present study it was aimed...
Article
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Amaurodon angulisporus is described as a new species based on material we collected in northern Guinean seasonal forest zones of Togo and Burkina Faso (West Africa). We used a combination of anatomical and LSU rDNA-based molecular phylogeny to characterise the new species. Amaurodon angulisporus is characterised by bluish basidiocarps when fresh th...
Article
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This study reports on seven resupinate thelephoroid species collected in Emilia Romagna region (Parma Province, North of Italy), namely Tomentella terrestris, T bryophila, T. stuposa. T. lapida, T. ellisii, T. lateritia and T. atramentaria. For each species, detailed anatomical descriptions, original iconographies and Scanning Electron Microscopy (...
Article
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Protandry has been described in orchids since Darwin (1862) as a strategy to promote cross-pollination. Three different forms of protandry have been reported in tribe Cranichideae: downward movement of the labellum in Spiranthes species, upward movement of the column in Sauroglossum elatum Lindl. and Manniella spp., and downward movement of the col...
Article
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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. Anat...
Article
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Detailed anatomical descriptions, original iconographies and SEM micrographs are provided for the following five resupinate Thelephorales: Tomentella cinerascens, T. ferruginea, T. botryoides, T. neobourdotii, and Pseudotomentella nigra. Their distribution and ecology within and beyond the study area are discussed. Tomentella botryoides, T. cineras...
Article
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Elevated tropospheric CO(2) concentrations may increase plant carbon fixation. In ectomycorrhizal trees, a considerable portion of the synthesized carbohydrates can be used to support the mutualistic fungal root partner which in turn can benefit the tree by increased nutrient supply. In this study, Norway spruce seedlings were inoculated with eithe...
Article
Morphological and anatomical characters of three thelephoroid ectomycorrhizae of the family Thelephoraceae on Chinese Pine (Pinus tabulaeformis) are described in detail. They are all brown and without rhizomorphs, and show high diversity regarding the structure of outer mantle layers and shape of cystidia. "Pinirhiza acuminata" is plectenchymatous...
Article
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The objective of this study was to describe the morphological and anatomical features of five unidentified ectomycorrhizal types of Alnus acuminata and to complement their identification based on ITS-rDNA sequence analysis. The combined approach of morphotyping and sequence analysis based on ITS sequence comparison with sequences contained in GenBa...
Article
Morphological and anatomical characters of four ectomycorrhizae with affinities to the genera Humaria, Geopora, and Trichophaea of Pyronemataceae (Pezizomycetes, Ascomycota) on Chinese Pine (Pinus tabulaeformis) are described. The ectomycorrhizae are yellowish brown to brown, and have pseudoparenchymatous outer mantle layers and partially warty ema...
Article
Sebacinoid fungi show a broad mycorrhizal capacity; therefore, they play a very important role in natural systems. Worldwide, fungi of Sebacinales are present under different environmental conditions and associate with diverse plant hosts, however, are hitherto poorly studied in China. Two sebacinoid ectomycorrhizae (ECM), Pinirhiza multifurcata an...
Article
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Nitrogen isotope values (δ15N) are higher in ectomycorrhizal fungi than in their plant hosts but the wide variability in δ15N among sporocarps of different fungal taxa is unexplained. We propose that fungal δ15N reflects sequestration of fungal nitrogen to build fungal biomass, and should accordingly reflect fungal exploration strategies and hyphal...
Article
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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. Isotopi...
Conference Paper
Background/Question/Methods Nitrogen isotope measurements on ectomycorrhizal fungi hold considerable promise for insights into plant nitrogen sources and patterns of nitrogen and carbon cycling in different fungal taxa. Although nitrogen isotope values (δ15N) are generally higher in ectomycorrhizal fungi than in their plant hosts, the wide variabil...
Article
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Oak woodlands in the Mediterranean basin have been traditionally converted into agro-silvo-pastoral systems and exemplified sustainable land use in Europe. In Portugal, in line with the trend of other European countries, profound changes in management options during the twentieth century have led to landscape simplification. Landscapes are dynamic...
Article
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The composition and the structure of the ectomycorrhizal (EM) community were investigated in seven European beech coppices, and differing for the year of the last cut (2-48 years), in Northern Italy. The research was conducted on the spatial and temporal distribution of the ectomycorrhizal species, to study if possible changes in the community coul...
Article
Aerobic sewage granules are dense, spherical biofilms, regarded as a useful and promising tool in wastewater treatment processes. Recent studies revealed that fungi can be implemented in biofilm formation. This study attempts to uncover the fungal diversity in aerobic granules by sequence analysis of the 18S and 5.8S rRNA genes and the internal tra...
Article
Structurally preserved periderm of the lycophyte Lepidodendron rhodumnense from the Visean (Mississippian) of central France contains a peronosporomycete (Combresomyces cornifer gen. sp. nov.) that occurs in the form of pyriform to subglobose terminal oogonia. On the surface is a conspicuous ornamentation, which may have formed through condensation...
Article
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The vertical distribution of the ectomycorrhizal (ECM) community was studied in four old high-mountain Norway spruce (Picea abies [L.] Karst.) stands in northern Italy. The aim was to verify if the variability in the community structure could be explained by characteristics of the organic and mineral soil horizons. The community structure was evalu...
Article
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The ectomycorrhizal status of Sistotrema sp. is shown by morphological–anatomical and molecular identification, confirming earlier reports about Sistotrema DNA in ectomycorrhizae (ECM). For molecular identification of the ECM nuclear rDNA ITS sequences obtained from mycorrhizal root tips and fruitbodies of Sistotrema sp. were compared. Blast search...
Article
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GenBank, the public repository for nucleotide and protein sequences, is a critical resource for molecular biology, evolutionary biology, and ecology. While some attention has been drawn to sequence errors ([1][1]), common annotation errors also reduce the value of this database. In fact, for
Article
1 Institut für Systematische Botanik, Section Mykologie, Universität München. Menzinger Str 67, 0–80638 München, Germany.
Article
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Scutellosporites devonicus from the Early Devonian Rhynie chert is the only fossil glomeromycotan spore taxon known to produce a germination shield. This paper describes a second type of glomeromycotan spore with a germination shield from the Rhynie chert. In contrast to S. devonicus, however, these spores are acaulosporoid and develop laterally in...
Article
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The species composition of ectomycorrhizal (ECM) fungal communities can be strongly influenced by abiotic and biotic factors, which determine interactions among the species such as resource partitioning, disturbance, competition, or relationships with other organisms. To verify whether ectomycorrhization of the root tips and composition of the ECM...
Article
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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 specie...
Article
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 specie...
Article
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This paper presents additional anatomical descriptions of T. radiosa, T. cenereoumbrina and T. punicea based on their holotype. For each species, original iconographies and anatomical features are presented and discussed in details. Similarities and differences between closest species are highlighted. ITS rDNA sequenceś similarities and phylogeneti...
Article
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In this study, a new tropical African resupinate thelephoroid species, namely Tomentella furcata, is described. Microscopically, it is characterised by mostly simple septate and thick-walled (1–2μm) subicular and subhymenial hyphae, suburniform basidia with transverse septa and/or infrequently with an internal hypha, large sterigmata of 2–4μm at ba...
Article
A new fossil polypore, Ganodermites libycus (Polyporales, Ganodermataceae), occurs in the form of a structurally preserved (permineralized) basidiocarp from the Lower Miocene (Neogene) of Jebel Zelten in the northern part of the Libyan Sahara, North Africa. The basidiocarp is characterized by distinct growth increments, a stratified hymenium, and e...
Article
Thelephoraceae are important contributors to the ectomycorrhizal diversity of temperate and boreal forests. Apart from Peudotomentella tristis and P. larsenii, P. humicola is now the third species of this genus, proven to form ectomycorrhizae. It forms brownish symbiotic organs when young that become dark brown to black at maturity; a slightly gree...
Article
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This paper presents Tomentella capitata and Tomentella brunneocystidia as new species based on molecular data and anatomical features. Both T. capitata and T. brunneocystidia form sister species with Tomentella pilosa. All three taxa are well supported by bootstrap values. Anatomically, T. capitata and T. brunneocystidia are very close and are simi...
Article
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Glomeromycotan spores from the Lower Devonian Rhynie chert provide the first evidence for germination shields in fossil fungi and demonstrate that this complex mode of germination was in place in some fungi at least 400 millionyears ago. Moreover, they represent the first direct marker relative to the precise systematic position of an Early Devonia...
Article
Aproximately 5,000–6,000 fungal species form ectomyorrhizae (ECM), the symbiotic organs with roots of predominantly trees. The contributing fungi are not evenly distributed over the system of fungi. Within Basidiomycota exclusively Hymenomycetes and within Ascomycota exclusively Ascomycetes contribute to the symbiosis. Hymenomycetes play a big part...