Andreas Beck

Andreas Beck
Botanische Staatssammlung München SNSB-BSM · Lichenology and Bryology Department

Dr.

About

78
Publications
19,056
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2,335
Citations
Citations since 2017
20 Research Items
1011 Citations
2017201820192020202120222023050100150
2017201820192020202120222023050100150
2017201820192020202120222023050100150
2017201820192020202120222023050100150
Additional affiliations
September 2006 - present
Ludwig-Maximilians-University of Munich
Position
  • Member
October 2002 - March 2005
Technische Universität München
Position
  • Research Assistant

Publications

Publications (78)
Article
Full-text available
Fungi involved in lichen symbioses produce a large array of secondary metabolites that are often diagnostic in the taxonomic delimitation of lichens. The most common lichen secondary metabolites—polyketides—are synthesized by polyketide synthases, particularly by Type I PKS (TI-PKS). Here, we present a comparative genomic analysis of the TI-PKS gen...
Preprint
Full-text available
Fungi involved in lichen symbioses produce a large array of different secondary metabolites. The high diversity of those substances has been known for decades and are often considered characteristic for taxonomical delimitation in lichen-forming fungi. Polyketides, the most common secondary metabolites, are synthesized by the Type I Polyketide synt...
Chapter
The lichen flora of the former long-term protected forest Wilder See in the Black Forest National Park was studied for the first time. 182 species were identified in this area of about 149 ha. Taxonomically critical species were sequenced (rDNA, ITS marker). The annotated list of species contains notes on taxonomy, abundance and specific ecological...
Article
Full-text available
To clarify deep relationships among species lineages within Bacidia s. str., and to investigate the robustness of the deeper branches, we combined data from three traditionally used RNA-coding genes (nrITS, nrLSU and mtSSU) with two protein-coding genes ( RPB 1 and RPB 2). The multigene phylogeny contained 48 newly generated sequences from the Russ...
Article
Full-text available
High-resolution X-ray computer tomography (microCT) is a well-established technique to analyse three-dimensional microstructures in 3D non-destructive imaging. The non-destructive threedimensional analysis of lichens is interesting for many reasons. The examination of hidden structural characteristics can, e.g., provide information on internal stru...
Article
Full-text available
The permeability of intact fungal fruit body skins (pileipelles) with respect to water and oxygen was determined for the first time. Methods that have been successfully applied to plant surfaces were used to study isolated pileipelles. Mechanically isolated skins from five genera of Basidiomycota (species of Amanita, Russula, Stropharia, Tapinella,...
Article
Full-text available
In recent years, several species that have long been considered to belong in Bacidia s. lat. have been transferred to other genera such as Bellicidia , Bibbya , Scutula , and also to Toniniopsis , accommodating species previously placed in Bacidia and Toninia . One of its widespread species, Toniniopsis subincompta , can be recognized by its thinly...
Article
On the relatively small complex of the Erfenstein Castle ruins 75 lichen species were found, including endangered and rare species. In addition to the species typical for sandstone, the castle is an oasis for numerous species on limestone. Due to the balanced ratio of nitrophytic to nitrophobic lichens, there is no evidence for excessive eutrophica...
Article
Abstract Lichens provide valuable systems for studying symbiotic interactions. In lichens, these interactions are frequently described in terms of availability, selectivity and specificity of the mycobionts and photobionts towards one another. The lichen-forming, green algal genus Trebouxia Puymaly is among the most widespread photobiont, associati...
Article
Lichens provide valuable systems for studying symbiotic interactions. In lichens, these interactions are frequently described in terms of availability, selectivity and specificity of the mycobionts and photobionts towards one another. The lichen-forming, green algal genus Trebouxia Puymaly is among the most widespread photobiont, associating with a...
Article
Full-text available
Since ice-free areas in Antarctica are predicted to increase by up to 25% before the end of this century, lichens such as the genus Placopsis will be important colonizers of these newly available grounds and will still be present in later successional stages of the lichen community. The main symbionts of Placopsis species are examined for 56 specim...
Article
Lichen secondary metabolites show important biological activities as well as pharmaceutical and chemotaxonomic potential. In order to utilize such substances of interest, detailed knowledge of their biosynthetic pathways is essential. 13CO2‐pulse/chase experiments using intact thalli of the lichen Usnea dasopoga resulted in multiple 13C‐labeled iso...
Article
Ungethüm K. 2018: Beiträge zur Flechtenflora Sachsen-Anhalts und angrenzender Regionen (Teil 1).-Herzogia 31: 700-715. Es werden 31 Taxa aus Mitteldeutschland behandelt. Insgesamt 13 Taxa konnten neu für Sachsen-Anhalt nachgewie-sen werden, darunter drei lichenicole Pilze. Es handelt sich um Bacidia fraxinea, Caloplaca atroflava, Candelaria pacific...
Article
The molecular phylogeny of Bacidia s.s. in the Russian Far East was investigated using 62 nucleotide sequences from the ITS nrDNA region, 22 of which were newly obtained. Phylogenetic reconstructions employed Bayesian inference and maximum likelihood searches using MrBayes and RAxML. In addition, ITS2 secondary structures added further support usin...
Article
Full-text available
Zusammenfassung: Stordeur R., Beck A., Christl S., Czarnota P., Eckstein J., Kison H.-U., Otte V., Seelemann A., Sipman H.J.M., Schiefelbein U. & Ungethüm K. 2018: Beiträge zur Flechtenflora Sachsen- Anhalts und angrenzender Regionen (Teil 1). – Herzogia 31: 700 –715. Es werden 31 Taxa aus Mitteldeutschland behandelt. Insgesamt 13 Taxa konnten neu...
Article
Full-text available
Link to full text: https://www.pollichia.de/images/Band_99_45-54_John_et_al.pdf Kurzfassung John, V., Aptroot, A., Beck, A., Berger, A., Seaward, M. R. D., Stapper, N. J., Vervoort, M. & Wagner, A. (2018): Die Flechten der Burgruine Drachen- fels, Biosphärenreservat Pfälzerwald-Nordvogesen.–– Mitt. POLLICHIA 99: 43–54, 11 Abb., 1 Tab., Bad Dürkheim...
Article
The processes that shaped the West Indian fern flora remain poorly understood. We attempt to investigate earlier biogeographical patterns described for the region using the genus Adiantum as model. These patterns propose that the West Indian fern flora has (1) an essentially continental rather than insular character, having a rich representation of...
Chapter
Meteorites have captured our fascination since our early history – they have evoked awe, fear, an irresistible curiosity, and numerous lively debates. Former historians have indicated that many of the ancient cultures and civilizations in Europe, Africa, Asia, the Inuit, and the native Indians in America regarded both the meteorite and the location...
Conference Paper
Full-text available
ITS2 secondary structures are a prominent and useful tool in taxon delimitation analyses in many groups of organisms. Here, it is demonstrated that these kinds of investigations are also helpful in delimitating species in Trebouxia and mainly add further support for the four morpho-genetic groups of species in the genus Trebouxia.
Conference Paper
Full-text available
Today the genus Trebouxia officially includes 26 species, however it still requires further taxonomical analysis of existing data. The high morphological variability in culture and lack of good identification keys lead to significant errors and inaccuracies in the identification of these algae. Nowadays molecular phylogeny and comparison of molecul...
Article
Coccoid green algae traditionally classified in Dictyochloropsis have a complex, reticulate chloroplast, when mature, without a pyrenoid. They occupy remarkably diverse ecological niches as free-living organisms or in association with lichen-forming fungi and were recently shown to form two distinct lineages within Trebouxiophyceae. We used a polyp...
Article
Full-text available
Despite the fact that lichen algae have been explored for over100 years, their diversity, taxonomy and ecology still remains understudied. In present study we analyzed 114 specimens representing 72 lichen taxa collected on the Crimean Peninsula, culturing and sequencing their algal partners. In total we identified 26 taxa of photobionts representin...
Article
Full-text available
We studied the evolutionary history of the Parmeliaceae (Lecanoromycetes, Ascomycota), one of the largest families of lichen-forming fungi with complex and variable morphologies, also including several lichenicolous fungi. We assembled a six-locus data set including nuclear, mitochondrial and low-copy protein-coding genes from 293 operational taxon...
Article
Full-text available
Non-targeted ¹H-NMR methods were used to determine metabolite profiles from crude extracts of Alpine and Ecuadorian lichens collected from their natural habitats. In control experiments, the robustness of metabolite detection and quantification was estimated using replicate measurements of Stereocaulon alpinum extracts. The deviations in the overal...
Article
Graphis scripta, or script lichen, is a well-known species of crustose lichenized fungi, widely distributed in the temperate region of the Northern Hemisphere. It is now considered to be a species complex, but because of the lack of secondary chemistry and paucity of measurable morphological characters, species delimitation within the complex has b...
Article
Dictyochloropsis is an ecologically important genus of free-living and symbiotic green algae. Representatives of this genus are horizontally transmitted among several fungi of the family Lobariaceae, thus forming photobiont-mediated guilds. This protocol is suitable for extracting DNA from algal cultures and lichen samples and for genotyping seven...
Conference Paper
Full-text available
While the Karadag Nature Reserve is one of the richest and most unique places in the world for lichen diversity, the algal component of these lichens is scarcely known. In total we identified 26 taxa of photobionts from 10 genera (Asterochloris, Chloroidium, Dilabifilum, Diplosphaera, Gloeocapsa, Myrmecia, Nostoc, Printzina, Stichococcus, Trebouxia...
Article
Full-text available
Intimate and long-lasting relationships of fungi and algae have been known for centuries by scientists, and these ancient symbioses might have provided excellent opportunities for horizontal gene transfer (HGT) of protein encoding genes between the two organismal partners. In this study, we sequenced and assembled 451 Mbp of novel genomic DNA from...
Article
Dictyochloropsis s.l. is an ecologically important, common but little-studied genus of green algae. Here, we examined the diversity and host selectivity of algae attributed to this genus at both species-to-species and species-to-community levels. We conducted a molecular investigation of 15 cultured strains and several lichen photobionts, using 18S...
Article
Endophytic fungal communities in leaves of deciduous trees usually undergo pronounced seasonal changes. We hypothesised that such compositional shifts are predominantly caused by annuality of the leaves and therefore less pronounced in fungi colonising the perennial substrates bark and corticolous lichens. To test this hypothesis, thalli of the fol...
Article
Full-text available
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
Full-text available
Premise of the study: Polymorphic microsatellite markers were developed for the symbiotic green alga Trebouxia decolorans to study fine-scale population structure and clonal diversity. Methods and Results: Using Illumina pyrosequencing, 20 microsatellite primer sets were developed for T. decolorans. The primer sets were tested on 43 individuals sa...
Article
Ancient mariners knew that dust whipped up from deserts by strong winds travelled long distances, including over oceans. Satellite remote sensing revealed major dust sources across the Sahara. Indeed, the Bodélé Depression in the Republic of Chad has been called the dustiest place on earth. We analysed desert sand from various locations in Chad and...
Article
Full-text available
Stable isotope patterns in lichens are known to vary largely, but effects of substrate on carbon and nitrogen stable isotope signatures of lichens were previously not investigated systematically. N and C contents and stable isotope (δ(15)N, δ(13)C) patterns have been measured in 92 lichen specimens of Xanthoria parietina from southern Bavaria growi...
Article
Full-text available
Members of the genus Dermatocarpon are widespread throughout the Northern Hemisphere along the edge of lakes, rivers and streams, and are subject to abiotic conditions reflecting both aquatic and terrestrial environments. Little is known about the evolutionary relationships within the genus and between continents. Investigation of the photobiont(s)...
Article
Little is known about the nature of the association between mycobionts and photobionts in isolated lichen communities. Here we studied the photobiont diversity of different Caloplaca species in a fog-induced community in the Atacama Desert. We compared nrDNA ITS sequences of both symbionts, photobionts and mycobionts, along with morphological chara...
Conference Paper
The photobionts of 83 lichen taxa presented by 128 specimens were isolated in culture and analyzed with methods of light microscopy and molecular phylogeny. A total 25 taxa of lichen photobionts related to 9 genera (Asterochloris Tscherm.-Woess, Chloroidium Nadson, Dilabifilum Tscherm.-Woess, Diplosphaera Bial., Myrmecia Printz, Nostoc Vaucher et F...
Article
Full-text available
Microbiological studies on the intercontinental transport of dust are confounded by the difficulty of obtaining sufficient material for analysis. Axenic samples of dust collected at high altitudes or historic specimens in museums are often so small and precious that the material can only be sacrificed when positive results are assured. With this in...
Article
Lichens are compound entities of a fungal partner (“mycobiont”) and one or more photosynthetically active algae or cyanobacteria (“photobionts”). The organisms live in an intimate, symbiotic association which has been classified as a mutualistic or controlled parasitic relationship. Several metabolites from lichens display unique structures with un...
Article
Full-text available
Cladonia rei and Cladonia subulata are morphologically similar, but chemically different cup lichens of dry grasslands and nutrient-poor ruderal habitats. Recently, C. rei has been synonymized with C. subulata on the basis of combined morphological and chemical investigations. However, doubts remained due to a molecular divergent North American sam...
Article
Full-text available
We isolated and characterized eight microsatellite markers for Dictyochloropsis reticulata, the primary photosynthetic partner of the epiphytic lichen Lobaria pulmonaria. These are the first microsatellite loci reported for a lichen symbiotic alga. These polymorphic markers will be useful for investigating spatial genetic structure, biogeography an...
Book
Am 13. Oktober 2008 lud die Kommission für Ökologie der Bayerischen Akademie der Wissenschaften zu ihrem 36. Rundgespräch mit dem Titel 'Ökologische Rolle der Flechten' ein. Flechten sind symbiontische Lebensgemeinschaften aus Pilzen und photosynthetisch aktiven Algen oder Cyanobakterien. Sie besiedeln in verschiedenen Wuchsformen – von krustig-sc...
Chapter
Zusammenfassung Flechten sind stabile symbiontische Assoziationen zwischen einem Pilz- und Algenpartner, die ein Flechtenlager bilden das oft charakteristische Sekundärmetabolite enthält. In dieser Le-bensgemeinschaft können Standorte besiedelt werden, die keiner der Partner allein besiedeln kann. Die Mehrzahl der Flechtenalgen gehören zu der Klas...
Article
Axenic cultures of lichen photobionts isolated from bark-inhabiting lichen thalli of the Physcietum adscendentis Ochsner were identified by light microscopy and sequence comparisons of internal transcribed spacer rDNAs to investigate principles of lichenization within a defined lichen sociological unit. The photobiont identity of eight lichen speci...
Article
Chaenotheca phaeocephala and C. subroscida have been characterized by differences in their morphology and ecology. They are, however, morphologically plastic and sometimes seem to intergrade. It has been suspected that the differences in morphology between these two taxa could possibly be phenotypic and caused by their occurrence in different habit...
Article
Full-text available
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
According to the literature the microfilamentous thalli of lichen-forming ascomycetes of the genus Psoroglaena are assumed to harbour vivid green "prochlorophyte" cyanobacterial photobionts. As this would be the first report of terrestrial "prochlorophytes" we investigated the fine structure and two molecular markers (SSU rDNA and rbcL) of the phot...
Article
Phytochelatins (PCs) are cysteine-rich peptides that chelate heavy metal ions, thereby mediating heavy metal tolerance in plants, fission yeast, and Caenorhabditis elegans. They are synthesized from glutathione by PC synthase, a specific dipeptidyltransferase. While Saccharomyces cerevisiae synthesizes PCs upon exposure to heavy metal ions, the S....
Article
Detoxification of xenobiotic compounds and heavy metals is a pivotal capacity of organisms, in which glutathione (GSH) plays an important role. In plants, electrophilic herbicides are conjugated to the thiol group of GSH, and heavy metal ions form complexes as thiolates with GSH-derived phytochelatins (PCs). In both detoxification processes of plan...
Article
On nutrient-poor rock surfaces, yeast-like black fungi (also called microcolonial fungi, MCF) may derive organic carbon either from the atmosphere or from interactions with other rock-inhabiting microorganisms. Interactions between free-living rock inhabiting heterotrophic fungi and phototrophic algae were investigated using axenic cultures. Five t...
Article
Full-text available
The genus Fusicladium s. lat. (incl. Pollaccia and Spilocaea) was phylogenetically analysed using ITS nrDNA sequences. Pollaccia and Spilocaea did not form monophyletic groups of their own, but were intermingled between Fusicladium species, together with which they formed a monophyletic clade. Thus, Pollaccia and Spilocaea should be included in a w...
Article
Within the last decade, molecular methods have revealed the relationships in many groups of lichenized Ascomycetes. However, the published phylogenies were often contradictory with respect to higher taxonomic levels. To achieve a more convincing overall picture of phylogenetic relationships of and within the Lecanoromycetes, we set up an alignment...
Article
Conjugation of xenobiotic compounds and endogenous metabolites to glutathione is an ubiquitous process in eukaryotes. In animals, the first and rate-limiting step of glutathione-S-conjugate metabolism is characterized by the removal of the aminoterminal glutamic acid residue of glutathione. In plants, however, glutathione-S-conjugates are generally...
Book
Full-text available
The selectivity of lichen symbionts growing on heavy-metal-rich substrate was investigated and the phylogenetic relationship of the photobionts was analysed in detail by light microscopical observation of axenically cultured algal clones as well as by molecular characterisation (nrDNA sequence analysis) of selected clones. Photobionts of the same l...
Article
Full-text available
Photobionts are the indispensable partners in lichen associations: usually hidden under a cortex of mycobiont plectenchyma, they are the solar power stations of lichens. As such they harvest light under an extreme range of ecological conditions, which might often be unsuitable for any of the symbiotic partners alone. Furthermore, the photobiont is...
Article
Summary • To examine the mode of dispersal and photobiont selectivity of Fulgensia fulgida we investigated the photobionts associated with the lichens of a community related to the Toninio–Psoretum decipientis association. • Photobionts and mycobionts were analysed using morphological (light microscopy) and molecular (internal transcribed spacer (I...
Article
Lichen thalli are composed of at least two genetically different organisms; a fungus (the mycobiont) and an alga (the photobiont). However, little evidence exists for genetic homogeneity within the populations of the two bionts. The aim of our study was to assess the photobiont population of a lichen thallus in this context. To this end it is neces...
Article
5' and 3' untranslated regions (UTRs) of plastid RNAs act as regulatory elements for post-transcriptional control of gene expression. Polyethylene glycol-mediated plastid transformation with UTR-GUS reporter gene fusions was used to study the function of the psbA, rbcL and rpl32 UTRs in vivo. All gene fusions were expressed from the same promoter,...
Article
The photobiont inventory of a stand of the Acarosporetum sinopicae, lichen community comprising saxicolous, chalcophilous lichens, has been analysed. Investigated lichen species were Acarospora rugulosa, A. sinopica, Bellemerea diamartha, Lecanora polytropa, L. subaurea, Lecidea silacea, L. lapicida, Rhizocarpon geographicum, and Umbilicaria cylind...
Article
A compilation of records of photobionts that are associated in lichens of the order Lecanorales shows that mycobionts, when seen at the levels of suborders, families, and genera, are strongly selective towards their photobionts. The recently proposed split of the genus Trebouxia into two genera, Asterochloris and Trebouxia, is reflected by the choi...

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Projects (8)
Project
Explore the ecological importance of fungi and fungal features.