The hyphomyceteTeberdinia hygrophilagen. nov., sp. nov. and related anamorphs ofPseudeurotiumspecies

Sogonov, M.V.; Schroers, Hans-Josef; Gams, W.; Dijksterhuis, Jan; Summerbell, Richard C.

doi:10.1080/15572536.2006.11832799

Cited by 18 publications

(6 citation statements)

References 17 publications

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“…Among these, the psychrophilic yeast 40 Mrakia stokesii was the most represented species (14 OTUs) in the analyzed environmental ice samples and in both 4 and 15 °C enrichment cultures, considering that Mrakia gelida is a synonymous species of M. stokesii 41 . Another cryophilic yeast, Teberdinia hygrophila , identified in alpine fen soil from Caucasus Mountains 42 , was present in the clear ice sample 1-L, and recovered from enrichment cultures of both presently-forming and 900 years old ice performed at 4 °C (1-S) and 15 °C (1-S, 900-O and 900-I) (Fig. 2 ).…”

Section: Resultsmentioning

confidence: 99%

Fungi in perennial ice from Scărișoara Ice Cave (Romania)

Brad

Iţcuş

Pascu³

et al. 2018

Sci Rep

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Screening of 1,000-years old ice layers from the perennial ice block of Scărișoara Ice Cave (NW Romania) revealed the presence of fungal communities. Using culture-dependent methods and molecular techniques based on DGGE fingerprinting of 18S rRNA gene fragments and sequencing, we identified 50 cultured and 14 uncultured fungi in presently-forming, 400 and 900 years old ice layers, corresponding to 28 distinct operational taxonomic units (OTUs). The dominant ice-contained fungal OTUs were related to Ascomycota, Basidiomycota and Cryptomycota phyla. Representatives of Mucoromycota and Chytridiomycota were also isolated from recent and 400 years old ice samples. The cryophilic Mrakia stokesii was the most abundant fungal species found in the cave ice samples of all prospected ages, alongside other cryophilic fungi also identified in various glacial environments. Ice deposits formed during the Little Ice Age (dated between AD 1,250 and 1,850) appeared to have a higher fungal diversity than the ice layer formed during the Medieval Warm Period (prior to AD 1,250). A more complex fungal community adapted to low temperatures was obtained from all analyzed ice layers when cultivated at 4 °C as compared to 15 °C, suggesting the dominance of cold-adapted fungi in this glacial habitat. The fungal distribution in the analyzed cave ice layers revealed the presence of unique OTUs in different aged-formed ice deposits, as a first hint for putative further identification of fungal biomarkers for climate variations in this icy habitat. This is the first report on fungi from a rock-hosted cave ice block.

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Section: Resultsmentioning

confidence: 99%

Fungi in perennial ice from Scărișoara Ice Cave (Romania)

Brad

Iţcuş

Pascu³

et al. 2018

Sci Rep

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“…1). However, Collophora species have phialidic conidiogenesis, while Teberdinia , the anamorph of Pseudeurotium , has sympodial conidiogenesis (Sogonov et al 2005). …”

Section: Resultsmentioning

confidence: 99%

Coniochaeta (Lecythophora), Collophora gen. nov. and Phaeomoniella species associated with wood necroses of Prunus trees

Damm

Fourie²,

Crous³

2010

Pers - Int Mycol J

117

150

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Species of the genus Coniochaeta (anamorph: Lecythophora) are known as pathogens of woody hosts, but can also cause opportunistic human infections. Several fungi with conidial stages resembling Lecythophora were isolated from necrotic wood samples of Prunus trees in South Africa. In order to reveal their phylogenetic relationships, these fungi were studied on a morphological and molecular (5.8S nrDNA, ITS-1, ITS-2, GAPDH, EF-1α, 28S nrDNA, 18S nrDNA) basis. Some of the isolates were identified as Coniochaeta (Sordariomycetes), including C. velutina and two new species, C. africana and C. prunicola. The majority of the isolates, however, formed pycnidial or pseudopycnidial synanamorphs and were not closely related to Coniochaeta. According to their 28S nrDNA phylogeny, they formed two distinct groups, one of which was closely related to Helotiales (Leotiomycetes). The new genus Collophora is proposed, comprising five species that frequently occur in necrotic peach and nectarine wood, namely Co. africana, Co. capensis, Co. paarla, Co. pallida and Co. rubra. The second group was closely related to Phaeomoniella chlamydospora (Eurotiomycetes), occurring mainly in plum wood. Besides P. zymoides occurring on Prunus salicina, four new species are described, namely P. dura, P. effusa, P. prunicola and P. tardicola. In a preliminary inoculation study, pathogenicity was confirmed for some of the new species on apricot, peach or plum wood.

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“…Control species, also obtained from the ATCC, were the ascomycetes Penicillium pinophilum ATCC MYA-9644 and Oidiodendron maius ATCC MYA-4765, an ericoid mycorrhizoid fungus in the Myxotrichaceae [33]. Pseudogymnoascus , though long thought to be a member of the Myxotrichaceae with Oidiodendron [34]–[36], has recently shown to be in a different Leotiomycete family [37]–[39], while Penicillium is a distantly related filamentous ascomycete in the class Eurotiomycetes [40]. Fungi were cultured at room temperature (20°C), except for P. destructans , which was cultured at 10°C on potato dextrose agar (PDA; 20 g/L dextrose, 4 g/L potato extract, 15 g/L agar, pH 6.8) from frozen spore suspensions prior to use in enzyme assays.…”

Section: Methodsmentioning

confidence: 99%

Comparison of the White-Nose Syndrome Agent Pseudogymnoascus destructans to Cave-Dwelling Relatives Suggests Reduced Saprotrophic Enzyme Activity

Reynolds

Barton

2014

PLoS ONE

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White-nose Syndrome (WNS) is an emerging infectious mycosis that has impacted multiple species of North American bats since its initial discovery in 2006, yet the physiology of the causal agent, the psychrophilic fungus Pseudogymnoascus destructans ( = Geomyces destructans), is not well understood. We investigated the ability of P. destructans to secrete enzymes that could permit environmental growth or affect pathogenesis and compared enzyme activity across several Pseudogymnoascus species isolated from both hibernating bats and cave sediments. We found that P. destructans produced enzymes that could be beneficial in either a pathogenic or saprotrophic context, such as lipases, hemolysins, and urease, as well as chitinase and cellulases, which could aid in saprotrophic growth. The WNS pathogen showed significantly lower activity for urease and endoglucanase compared to con-generic species (Pseudogymnoascus), which may indicate a shift in selective pressure to the detriment of P. destructans’ saprotrophic ability. Based on the positive function of multiple saprotrophic enzymes, the causal agent of White-nose Syndrome shows potential for environmental growth on a variety of substrates found in caves, albeit at a reduced level compared to environmental strains. Our data suggest that if P. destructans emerged as an opportunistic infection from an environmental source, co-evolution with its host may have led to a reduced capacity for saprotrophic growth.

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The hyphomyceteTeberdinia hygrophilagen. nov., sp. nov. and related anamorphs ofPseudeurotiumspecies

Cited by 18 publications

References 17 publications

Fungi in perennial ice from Scărișoara Ice Cave (Romania)

Fungi in perennial ice from Scărișoara Ice Cave (Romania)

<I>Coniochaeta</I> (<I>Lecythophora</I>), <I>Collophora</I> gen. nov. and <I>Phaeomoniella</I> species associated with wood necroses of <I>Prunus</I> trees

Comparison of the White-Nose Syndrome Agent Pseudogymnoascus destructans to Cave-Dwelling Relatives Suggests Reduced Saprotrophic Enzyme Activity

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