A new species of Capnobotryella from monument surfaces

Sert, Hacer; Sümbül, Hüseyin; Sterflinger, Katja

doi:10.1016/j.mycres.2007.06.011

Cited by 32 publications

(14 citation statements)

References 11 publications

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“…The most relatively abundant phylotype in samples where it was present (Cher2, Cher6, Cher8) was related to Capnobotryella (representative sequences cher2_1E_99, cher6_1E_118, cher8_1E_76). Capnobotryella is a black fungus frequently retrieved from monument surfaces, including energy transmission towers, and windows as well as desert areas [81], [82], [83], [84]. Capnobotryella appears to colonize lichens in an opportunistic manner [82].…”

Section: Resultsmentioning

confidence: 99%

Sunlight-Exposed Biofilm Microbial Communities Are Naturally Resistant to Chernobyl Ionizing-Radiation Levels

et al. 2011

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BackgroundThe Chernobyl accident represents a long-term experiment on the effects of exposure to ionizing radiation at the ecosystem level. Though studies of these effects on plants and animals are abundant, the study of how Chernobyl radiation levels affect prokaryotic and eukaryotic microbial communities is practically non-existent, except for a few reports on human pathogens or soil microorganisms. Environments enduring extreme desiccation and UV radiation, such as sunlight exposed biofilms could in principle select for organisms highly resistant to ionizing radiation as well.Methodology/Principal FindingsTo test this hypothesis, we explored the diversity of microorganisms belonging to the three domains of life by cultivation-independent approaches in biofilms developing on concrete walls or pillars in the Chernobyl area exposed to different levels of radiation, and we compared them with a similar biofilm from a non-irradiated site in Northern Ireland. Actinobacteria, Alphaproteobacteria, Bacteroidetes, Acidobacteria and Deinococcales were the most consistently detected bacterial groups, whereas green algae (Chlorophyta) and ascomycete fungi (Ascomycota) dominated within the eukaryotes. Close relatives to the most radio-resistant organisms known, including Rubrobacter species, Deinococcales and melanized ascomycete fungi were always detected. The diversity of bacteria and eukaryotes found in the most highly irradiated samples was comparable to that of less irradiated Chernobyl sites and Northern Ireland. However, the study of mutation frequencies in non-coding ITS regions versus SSU rRNA genes in members of a same actinobacterial operational taxonomic unit (OTU) present in Chernobyl samples and Northern Ireland showed a positive correlation between increased radiation and mutation rates.Conclusions/SignificanceOur results show that biofilm microbial communities in the most irradiated samples are comparable to non-irradiated samples in terms of general diversity patterns, despite increased mutation levels at the single-OTU level. Therefore, biofilm communities growing in sunlight exposed substrates are capable of coping with increased mutation rates and appear pre-adapted to levels of ionizing radiation in Chernobyl due to their natural adaptation to periodical desiccation and ambient UV radiation.

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Section: Resultsmentioning

confidence: 99%

Sunlight-Exposed Biofilm Microbial Communities Are Naturally Resistant to Chernobyl Ionizing-Radiation Levels

et al. 2011

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“…Rock-inhabiting fungi have been repeatedly isolated from stone monuments in Greece, Turkey (e.g., Gorbushina et al 1993;Bogomolova and Minter 2003;Sert et al 2007aSert et al , 2007bSert et al , 2007cSert and Sterflinger 2010) and, to a less extent, Georgia (Caneva et al 2013) and Italy (De Leo et al 2003, Marvasi et al 2012. Some RIF colonizing monuments in urban environments are prone to additional external stresses than sun exposition, oligotrophy, and prolonged dryness, due to air pollution, while others may have a competitive advantage by their ability to assimilate toxic hydrocarbons (Prenafeta-Boldú et al 2006).…”

Section: Discussionmentioning

confidence: 99%

Extremotolerant rock inhabiting black fungi from Italian monumental sites

et al. 2015

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A wide sampling for isolating highly destructive and extremotolerant black fungi was performed from Italian monuments in selected historical sites which include the “Cortile della Pigna”, Vatican Museum and the St Peter colonnade (Vatican City State), the monumental cemetery of Bonaria (Cagliari), and other monuments in the city of Cagliari. Thirty out of seventy-four strains isolated were identified basing on ITS Blastn comparison. Based on multilocus phylogeny and morphological data, one new genus and species Lithophila guttulata, five new species Knufia marmoricola, K. vaticanii, K. karalitana, K. mediterranea and Exophiala bonariae, order Chaetothyriales and one new genus and species, Saxophila tyrrhenica, and two new species Vermiconia calcicola and Devriesia sardiniae, order Capnodiales, were proposed. Ecological considerations are put forward

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“…Recently, Sert et al (2007) identified new species of the genus Capnobotryella on monument surfaces. Their occurrence on marble monuments is associated with aesthetical degradation due to the colour changes and black spots.…”

Section: Discussionmentioning

confidence: 99%

Anatase as an alternative application for preventing biodeterioration of mortars: Evaluation and comparison with other biocides

Fonseca¹,

Piña²,

Macedo³

et al. 2010

International Biodeterioration & Biodegradation

111

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a b s t r a c tThe aim of this study is the comparison between different treatments (anatase and two conventional biocides: Biotin T and Anios) for preventing biodeterioration of mortars. The treatments were applied both in the laboratory on mortar slabs and in situ on walls of Palácio Nacional da Pena (Sintra, Portugal). Mortar slabs treated with anatase (pure and Fe 3þ doped) applied as a coating or by mixing within the mortar were prepared, and their surfaces characterized by different methodologies. The mortars were inoculated with cyanobacteria and chlorophyta species, incubated for a period of 4 months and the chlorophyll content quantified by extraction method and fluorescence emission. For comparison purposes untreated mortar slabs were inoculated, incubated and finally treated with the biocides. After two weeks the respective chlorophyll contents was quantified.In situ studies in two external walls of Palácio Nacional da Pena covered by organisms were also performed by direct application of aqueous solutions of the three products, and the efficiency of the treatment monitored by spectrophotometry using the CIELAB method. Lichens and other phototrophic microorganisms were identified by direct observation with a microscope and cyanobacteria, green microalgae, bacteria and fungi by DNA-based molecular analysis targeting the 16S and 18S ribosomal RNA genes.The results show that anatase is a better agent for preventing biodeterioration than the two tested conventional biocides, both in mortars slabs and in situ studies. In fact, photographic and colorimetric records made in two external walls of Palácio Nacional da Pena after two weeks of treatments application showed that lichens and other phototrophic microorganisms disappear from the places where anatase was applied.

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A new species of Capnobotryella from monument surfaces

Cited by 32 publications

References 11 publications

Sunlight-Exposed Biofilm Microbial Communities Are Naturally Resistant to Chernobyl Ionizing-Radiation Levels

Sunlight-Exposed Biofilm Microbial Communities Are Naturally Resistant to Chernobyl Ionizing-Radiation Levels

Extremotolerant rock inhabiting black fungi from Italian monumental sites

Anatase as an alternative application for preventing biodeterioration of mortars: Evaluation and comparison with other biocides

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