Keratinophilic fungi isolated from antarctic soil

Mercantini, R.; Marsella, R.; Cervellati, M C

doi:10.1007/bf00436926

Cited by 69 publications

(26 citation statements)

References 3 publications

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“…However, ecophysiological characterizations of these taxa in terms of ther− mal characteristics have rarely been attempted. Taxa that have previously been de− scribed as psychrophilic or psychrotolerant include Mortierella alpina and Mucor hiemalis (Bergero et al 1999;Tosi et al 2002;Gawas−Sakhalkar andSingh 2011), P. lagerbergii (Bergero et al 1999), Geomyces pannorum (Mercantini 1989;Krishnan et al 2011), and Neonectria ramulariae (Fiedurek et al 2003;Chaverri et al 2011). However, the classification of some taxa based on the current study differed from previous reports, including that of Mortierella elongata (cf.…”

Section: Discussionmentioning

confidence: 51%

“…These findings are consistent with the frequent occurrence of both species in vertebrate−influenced sites in the present study. Geomyces pan− norum has been described as strongly keratinophilic (Mercantini et al 1989). Thus, the presence of this species in Arctic soils may be linked with that of kera− tin−containing debris such as feathers.…”

Section: Discussionmentioning

confidence: 99%

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Studies on diversity of soil microfungi in the Hornsund area, Spitsbergen

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Siang

et al. 2013

Polish Polar Research

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Abstract:We assessed culturable soil microfungal diversity in various habitats around Hornsund, Spitsbergen in the High Arctic, using potato dextrose agar (PDA) medium. Thermal growth classification of the fungi obtained was determined by incubating them in 4°C and 25°C, permitting separation of those with psychrophilic, psychrotolerant and mesophilic char− acteristics. In total, 68 fungal isolates were obtained from 12 soil samples, and grouped into 38 mycelial morphotypes. Intergenic spacer regions of these morphotypes were sequenced, and they represented 25 distinct taxonomic units, of which 21 showed sufficient similarity with available sequence data in NCBI to be identified to species level. Soil under ornithogenic influ− ence showed the highest species diversity, including sequences assigned to Mortierella macrocystis, M. elongata, Mortierella sp., Cudoniella sp., Varicosporium elodeae, Beauveria bassiana, Geomyces pannorum, Penicillium sp. and Atradidymella muscivora. Fourteen taxa were classified as psychrophilic, seven mesophilic, and four psychrotolerant.

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Section: Discussionmentioning

confidence: 51%

Section: Discussionmentioning

confidence: 99%

Studies on diversity of soil microfungi in the Hornsund area, Spitsbergen

Ali

Alias

Siang

et al. 2013

Polish Polar Research

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“…Geomyces sp. have been frequently recorded in Antarctica, are a celluloytic, keratinophilic, psychrophilic and halotolerant fungi with a ubiquitous distribution in the soils of cold regions that is able to colonise and to utilise different carbon sources (Mercantini et al, 1989). In addition, Geomyces taxa were found on the thalli of the macroalgae A. utricularis and D. anceps (Loque et al, 2010), leaves of Colobanthus quitensis , mosses (Tosi et al, 2002) and in freshwater lakes .…”

Section: Discussionmentioning

confidence: 99%

Diversity and bioprospecting of fungal communities associated with endemic and cold-adapted macroalgae in Antarctica

et al. 2013

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We surveyed the distribution and diversity of fungi associated with eight macroalgae from Antarctica and their capability to produce bioactive compounds. The collections yielded 148 fungal isolates, which were identified using molecular methods as belonging to 21 genera and 50 taxa. The most frequent taxa were Geomyces species (sp.), Penicillium sp. and Metschnikowia australis. Seven fungal isolates associated with the endemic Antarctic macroalgae Monostroma hariotii (Chlorophyte) displayed high internal transcribed spacer sequences similarities with the psychrophilic pathogenic fungus Geomyces destructans. Thirty-three fungal singletons (66%) were identified, representing rare components of the fungal communities. The fungal communities displayed high diversity, richness and dominance indices; however, rarefaction curves indicated that not all of the fungal diversity present was recovered. Penicillium sp. UFMGCB 6034 and Penicillium sp. UFMGCB 6120, recovered from the endemic species Palmaria decipiens (Rhodophyte) and M. hariotii, respectively, yielded extracts with high and selective antifungal and/or trypanocidal activities, in which a preliminary spectral analysis using proton nuclear magnetic resonance spectroscopy indicated the presence of highly functionalised aromatic compounds. These results suggest that the endemic and cold-adapted macroalgae of Antarctica shelter a rich, diversity and complex fungal communities consisting of a few dominant indigenous or mesophilic cold-adapted species, and a large number of rare and/or endemic taxa, which may provide an interesting model of algal-fungal interactions under extreme conditions as well as a potential source of bioactive compounds.

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“…The fact of unintentional transport of fungal propagules along with people arriv− ing at the polar stations, regardless of whether these fungal species are considered to be alien or not, is a dangerous phenomenon since many of the species recorded in the studied samples are potentially pathogenic to plants ) and warm−blooded animals (Wicklow 1968;Mercantini et al 1989). For many indige− nous populations of the Antarctic flora and fauna, geographical isolation is the rea− son why fungi associated with human activities in the Antarctic can be novel patho− gens.…”

Section: Discussionmentioning

confidence: 99%

An analysis of fungal propagules transported to the Henryk Arctowski Antarctic Station

Augustyniuk-Kram¹,

Chwedorzewska²,

Korczak−Abshire³

et al. 2013

Polish Polar Research

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During three austral summer seasons, dust and soil from clothes, boots and equip− ment of members of scientific expeditions and tourists visiting the Polish Antarctic Station Henryk Arctowski were collected and analysed for the presence of fungal propagules. Of a to− tal of 60 samples, 554 colonies of fungi belonging to 19 genera were identified. Colonies of the genus Cladosporium, Penicillium and non−sporulating fungus (Mycelia sterilia) domi− nated in the examined samples. The microbiological assessment of air for the presence of fungi was also conducted at two points in the station building and two others outside the sta− tion. A total of 175 fungal colonies belonging to six genera were isolated. Colonies of the ge− nus Penicillium were the commonest in the air samples. The potential epidemiological conse− quences for indigenous species as a result of unintentional transport of fungal propagules to the Antarctic biome are discussed in the light of rapid climate change in some parts of the Ant− arctic and adaptation of fungi to extreme conditions.

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Keratinophilic fungi isolated from antarctic soil

Cited by 69 publications

References 3 publications

Studies on diversity of soil microfungi in the Hornsund area, Spitsbergen

Studies on diversity of soil microfungi in the Hornsund area, Spitsbergen

Diversity and bioprospecting of fungal communities associated with endemic and cold-adapted macroalgae in Antarctica

An analysis of fungal propagules transported to the Henryk Arctowski Antarctic Station

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