@article{MTMT:34864642, title = {Taxonomic diversity of extremophilic prokaryotes adapted to special environmental parameters in Hungary: a review}, url = {https://m2.mtmt.hu/api/publication/34864642}, author = {Kériné Borsodi, Andrea}, doi = {10.1007/s42977-024-00224-4}, journal-iso = {BIOL FUTURA}, journal = {BIOLOGIA FUTURA}, volume = {75}, unique-id = {34864642}, issn = {2676-8615}, abstract = {The taxonomic and metabolic diversity of prokaryotes and their adaptability to extreme environmental parameters have allowed extremophiles to find their optimal living conditions under extreme conditions for one or more environmental parameters. Natural habitats abundant in extremophilic microorganisms are relatively rare in Hungary. Nevertheless, alkaliphiles and halophiles can flourish in shallow alkaline lakes (soda pans) and saline (solonetz) soils, where extreme weather conditions favor the development of unique bacterial communities. In addition, the hot springs and thermal wells that supply spas and thermal baths and provide water for energy use are suitable colonization sites for thermophiles and hyperthermophiles. Polyextremophiles, adapted to multiple extreme circumstances, can be found in the aphotic, nutrient-poor and radioactive hypogenic caves of the Buda Thermal Karst, among others. The present article reviews the organization, taxonomic composition, and potential role of different extremophilic bacterial communities in local biogeochemical cycles, based on the most recent studies on extremophiles in Hungary.}, year = {2024}, eissn = {2676-8607}, pages = {183-192}, orcid-numbers = {Kériné Borsodi, Andrea/0000-0002-3738-7937} } @article{MTMT:33256633, title = {Assessment of microbial communities colonizing the Azé prehistoric cave}, url = {https://m2.mtmt.hu/api/publication/33256633}, author = {Alaoui-Sosse, Badr and Ozaki, Shinji and Barriquand, Lionel and De Luca, Daniele and Cennamo, Paola and Valot, Benoit and Alaoui-Sosse, Laurence and Bourgeade, Pascale and Bousta, Faisl and Aleya, Lotfi and Pfendler, Stéphane}, doi = {10.1016/j.culher.2022.10.014}, journal-iso = {J CULT HERIT}, journal = {JOURNAL OF CULTURAL HERITAGE}, volume = {59}, unique-id = {33256633}, issn = {1296-2074}, year = {2023}, eissn = {1778-3674}, pages = {1-9}, orcid-numbers = {Barriquand, Lionel/0000-0001-9669-9933; De Luca, Daniele/0000-0002-1639-9138} } @article{MTMT:34431117, title = {Habitat-related variability in the morphological and taxonomic diversity of microbial communities in two Hungarian epigenic karst caves}, url = {https://m2.mtmt.hu/api/publication/34431117}, author = {Lange-Enyedi, Nóra and Kériné Borsodi, Andrea and Németh, Péter and Czuppon, György and Kovács, Ivett and Leél-Őssy, Szabolcs and Dobosy, Péter and Felföldi, Tamás and Demény, Attila and Makk, Judit}, doi = {10.1093/femsec/fiad161}, journal-iso = {FEMS MICROBIOL ECOL}, journal = {FEMS MICROBIOLOGY ECOLOGY}, volume = {99}, unique-id = {34431117}, issn = {0168-6496}, abstract = {The physical and chemical characteristics of the bedrock, along with the geological and hydrological conditions of karst caves may influence the taxonomic and functional diversity of prokaryotes. Most studies so far have focused on microbial communities of caves including only a few samples and have ignored the chemical heterogeneity of different habitat types such as sampling sites, dripping water, carbonate precipitates, cave walls, cave sediment and surface soils connected to the caves. The aim of the present study was to compare the morphology, the composition and physiology of the microbiota in caves with similar environmental parameters (temperature, host rock, elemental and mineral composition of speleothems) but located in different epigenic karst systems. Csodabogyós Cave and Baradla Cave (Hungary) were selected for the analysis of bacterial and archaeal communities using electron microscopy, amplicon sequencing, X-ray diffraction and mass spectroscopic techniques. The microbial communities belonged to the phyla Pseudomonadota, Acidobacteriota, Nitrospirota and Nitrososphaerota, and they showed site-specific variation in composition and diversity. The results indicate that morphological and physiological adaptations provide survival for microorganisms according to the environment. In epigenic karst caves, prokaryotes are prone to increase their adsorption surface, cooperate in biofilms, and implement chemolithoautotrophic growth with different electron-donors and acceptors available in the microhabitats.}, year = {2023}, eissn = {1574-6941}, orcid-numbers = {Kériné Borsodi, Andrea/0000-0002-3738-7937; Németh, Péter/0000-0001-5592-5877; Czuppon, György/0000-0002-7231-6042; Kovács, Ivett/0000-0001-7015-7909; Leél-Őssy, Szabolcs/0000-0002-5548-129X; Felföldi, Tamás/0000-0003-2009-2478; Demény, Attila/0000-0003-0522-9018; Makk, Judit/0000-0001-5768-7622} } @article{MTMT:33628317, title = {Horizontal Gene Transfer of Antibiotic Resistance Genes in Biofilms}, url = {https://m2.mtmt.hu/api/publication/33628317}, author = {Michaelis, Claudia and Grohmann, Elisabeth}, doi = {10.3390/antibiotics12020328}, journal-iso = {ANTIBIOTICS-BASEL}, journal = {ANTIBIOTICS}, volume = {12}, unique-id = {33628317}, issn = {2079-6382}, abstract = {Most bacteria attach to biotic or abiotic surfaces and are embedded in a complex matrix which is known as biofilm. Biofilm formation is especially worrisome in clinical settings as it hinders the treatment of infections with antibiotics due to the facilitated acquisition of antibiotic resistance genes (ARGs). Environmental settings are now considered as pivotal for driving biofilm formation, biofilm-mediated antibiotic resistance development and dissemination. Several studies have demonstrated that environmental biofilms can be hotspots for the dissemination of ARGs. These genes can be encoded on mobile genetic elements (MGEs) such as conjugative and mobilizable plasmids or integrative and conjugative elements (ICEs). ARGs can be rapidly transferred through horizontal gene transfer (HGT) which has been shown to occur more frequently in biofilms than in planktonic cultures. Biofilm models are promising tools to mimic natural biofilms to study the dissemination of ARGs via HGT. This review summarizes the state-of-the-art of biofilm studies and the techniques that visualize the three main HGT mechanisms in biofilms: transformation, transduction, and conjugation.}, year = {2023}, eissn = {2079-6382}, pages = {328} } @article{MTMT:34421558, title = {Assessing the Influence of HGT on the Evolution of Stress Responses in Microbial Communities from Shark Bay, Western Australia}, url = {https://m2.mtmt.hu/api/publication/34421558}, author = {Skoog, Emilie J. and Fournier, Gregory P. and Bosak, Tanja}, doi = {10.3390/genes14122168}, journal-iso = {GENES-BASEL}, journal = {GENES}, volume = {14}, unique-id = {34421558}, issn = {2073-4425}, abstract = {Pustular microbial mats in Shark Bay, Western Australia, are modern analogs of microbial systems that colonized peritidal environments before the evolution of complex life. To understand how these microbial communities evolved to grow and metabolize in the presence of various environmental stresses, the horizontal gene transfer (HGT) detection tool, MetaCHIP, was used to identify the horizontal transfer of genes related to stress response in 83 metagenome-assembled genomes from a Shark Bay pustular mat. Subsequently, maximum-likelihood phylogenies were constructed using these genes and their most closely related homologs from other environments in order to determine the likelihood of these HGT events occurring within the pustular mat. Phylogenies of several stress-related genes—including those involved in response to osmotic stress, oxidative stress and arsenic toxicity—indicate a potentially long history of HGT events and are consistent with these transfers occurring outside of modern pustular mats. The phylogeny of a particular osmoprotectant transport gene reveals relatively recent adaptations and suggests interactions between Planctomycetota and Myxococcota within these pustular mats. Overall, HGT phylogenies support a potentially broad distribution in the relative timing of the HGT events of stress-related genes and demonstrate ongoing microbial adaptations and evolution in these pustular mat communities.}, year = {2023}, eissn = {2073-4425}, pages = {2168}, orcid-numbers = {Fournier, Gregory P./0000-0003-1605-5455; Bosak, Tanja/0000-0001-5179-5323} } @article{MTMT:32606386, title = {Impacts of Different Habitats on the Composition of Bacterial Communities at the Discharging Endpoints of a Hypogene Thermal Karst System}, url = {https://m2.mtmt.hu/api/publication/32606386}, author = {Kériné Borsodi, Andrea and Anda, Dóra and Szabó, Attila and Megyes, Melinda and Krett, Gergely}, doi = {10.1080/01490451.2021.2023709}, journal-iso = {GEOMICROBIOL J}, journal = {GEOMICROBIOLOGY JOURNAL}, volume = {39}, unique-id = {32606386}, issn = {0149-0451}, year = {2022}, eissn = {1521-0529}, pages = {155-165}, orcid-numbers = {Kériné Borsodi, Andrea/0000-0002-3738-7937; Szabó, Attila/0000-0002-7777-8166; Megyes, Melinda/0000-0002-7178-5883; Krett, Gergely/0000-0003-1145-4852} } @{MTMT:33041060, title = {The Caves of the Northeastern Part of the Transdanubian Mountains}, url = {https://m2.mtmt.hu/api/publication/33041060}, author = {Leél-Őssy, Szabolcs and Virág, Magdolna}, booktitle = {Cave and karst systems of Hungary}, doi = {10.1007/978-3-030-92960-2_12}, unique-id = {33041060}, year = {2022}, pages = {361-413}, orcid-numbers = {Leél-Őssy, Szabolcs/0000-0002-5548-129X; Virág, Magdolna/0000-0001-6104-1963} } @article{MTMT:33255813, title = {Trans-kingdom interactions in mixed biofilm communities}, url = {https://m2.mtmt.hu/api/publication/33255813}, author = {Sadiq, Faizan Ahmed and Hansen, Mads Frederik and Burmolle, Mette and Heyndrickx, Marc and Flint, Steve and Lu, Wenwei and Chen, Wei and Zhang, Hao}, doi = {10.1093/femsre/fuac024}, journal-iso = {FEMS MICROBIOL REV}, journal = {FEMS MICROBIOLOGY REVIEWS}, volume = {46}, unique-id = {33255813}, issn = {0168-6445}, abstract = {The microbial world represents a phenomenal diversity of microorganisms from different kingdoms of life, which occupy an impressive set of ecological niches. Most, if not all, microorganisms once colonize a surface develop architecturally complex surface-adhered communities, which we refer to as biofilms. They are embedded in polymeric structural scaffolds and serve as a dynamic milieu for intercellular communication through physical and chemical signalling. Deciphering microbial ecology of biofilms in various natural or engineered settings has revealed coexistence of microorganisms from all domains of life, including Bacteria, Archaea, and Eukarya. The coexistence of these dynamic microbes is not arbitrary, as a highly coordinated architectural setup and physiological complexity show ecological interdependence and myriads of underlying interactions. In this review, we describe how species from different kingdoms interact in biofilms and discuss the functional consequences of such interactions. We highlight metabolic advances of collaboration among species from different kingdoms, and advocate that these interactions are of great importance and need to be addressed in future research. Since trans-kingdom biofilms impact diverse contexts, ranging from complicated infections to efficient growth of plants, future knowledge within this field will be beneficial for medical microbiology, biotechnology, and our general understanding of microbial life in nature.}, keywords = {EPITHELIAL-CELLS; CANDIDA-ALBICANS; PSEUDOMONAS-AERUGINOSA; Crosstalk; STAPHYLOCOCCUS-AUREUS; quorum sensing; LACTIC-ACID BACTERIA; HORIZONTAL GENE-TRANSFER; mixed biofilms; SURFACE-PROTEINS; quorum sensing molecules; trans-kingdom interactions; SPECIES BIOFILMS}, year = {2022}, eissn = {1574-6976}, orcid-numbers = {Hansen, Mads Frederik/0000-0001-9283-304X} } @article{MTMT:32350158, title = {Influence of Environmental Factors on the Variability of Archaeal Communities in a Karst Wetland}, url = {https://m2.mtmt.hu/api/publication/32350158}, author = {Chen, Ying and Qiu, Kairui and Zhong, Ziyuan and Zhou, Tao}, doi = {10.3389/fmicb.2021.675665}, journal-iso = {FRONT MICROBIOL}, journal = {FRONTIERS IN MICROBIOLOGY}, volume = {12}, unique-id = {32350158}, issn = {1664-302X}, abstract = {Archaea are ubiquitous and play an important role in elemental cycles in Earth's biosphere; but little is known about their diversity, distribution, abundance, and impact in karst environments. The present study investigated the effect of environmental factors on the variability of archaeal communities in the sediment of the Huixian karst wetland, the largest karst wetland in South China. Sediment cores were obtained from four sampling sites with different water depths and macrophyte inhabitants in both the winter of 2016 and the summer of 2018. The community analysis was based on PacBio sequencing and quantitative PCR of the archaeal 16S rRNA gene. The results showed that Euryarchaeota (57.4%) and Bathyarchaeota (38.7%) were dominant in all the samples. Methanogenic Methanosarcinales (25.1%) and Methanomicrobiales (13.7%), and methanotrophic archaea ANME-2d (9.0%) were the dominant Euryarchaeota; MCG-11 (16.5%), MCG-6 (9.1%), and MCG-5b (5.5%) were the dominant Bathyarchaeota. The community composition remained stable between summer and winter, and the vertical distributions of the archaeal phyla conformed to two patterns among the four sampling sites. In the winter samples, the archaeal 16S rRNA gene abundance was approximately 1.0E+10 copies/g of wet sediment and the Shannon index was 7.3 +/- 5, which were significantly higher than in the summer samples and in other karst environments. A correlation analysis showed that the moisture content and pH were the factors that mostly affected the archaeal communities. The prevalence of nitrate in the summer may be a key factor causing a significant decrease in archaeal abundance and diversity. Two features specific to karst environments, calcium-richness and weak alkalescence of the water supplies, may benefit the prevalence of bathyarchaeotal subgroups MCG-11, MCG-5b, and MCG-6. These results suggest that in karst wetlands, most of the archaea belong to clades that have significant roles in carbon turnover; their composition remains stable, but their abundance and diversity vary significantly from season to season.}, keywords = {Bathyarchaeota; ANME-2d; Euryarchaeota; Karst wetland; MCG-11}, year = {2021}, eissn = {1664-302X} } @article{MTMT:32113773, title = {Different Responses of Bacterial and Archaeal Communities in River Sediments to Water Diversion and Seasonal Changes}, url = {https://m2.mtmt.hu/api/publication/32113773}, author = {Lv, Jiali and Niu, Yangdan and Yuan, Ruiqiang and Wang, Shiqin}, doi = {10.3390/microorganisms9040782}, journal-iso = {MICROORGANISMS}, journal = {MICROORGANISMS}, volume = {9}, unique-id = {32113773}, issn = {2076-2607}, abstract = {In recent years, different responses of archaea and bacteria to environmental changes have attracted increasing scientific interest. In the mid-latitude region, Fen River receives water transferred from the Yellow River, electrical conductivity (EC), concentrations of Cl- and Na+ in water, total phosphorus (TP), and Olsen phosphorus (OP) in sediments were significantly affected by water transfer. Meanwhile, temperature and oxidation-reduction potential (ORP) of water showed significant seasonal variations. Based on 16S rRNA high-throughput sequencing technology, the composition of bacteria and archaea in sediments was determined in winter and summer, respectively. Results showed that the dominance of bacterial core flora decreased and that of archaeal core flora increased after water diversion. The abundance and diversity of bacterial communities in river sediments were more sensitive to anthropogenic and naturally induced environmental changes than that of archaeal communities. Bacterial communities showed greater resistance than archaeal communities under long-term external disturbances, such as seasonal changes, because of rich species composition and complex community structure. Archaea were more stable than bacteria, especially under short-term drastic environmental disturbances, such as water transfer, due to their insensitivity to environmental changes. These results have important implications for understanding the responses of bacterial and archaeal communities to environmental changes in river ecosystems affected by water diversion.}, keywords = {BACTERIA; ARCHAEA; Seasonal changes; River sediments; Water Transfer; 16SrRNA high-throughput sequencing}, year = {2021}, eissn = {2076-2607}, orcid-numbers = {Yuan, Ruiqiang/0000-0002-6263-4565} } @article{MTMT:32193288, title = {Procaryotic Diversity and Hydrogenotrophic Methanogenesis in an Alkaline Spring (La Crouen, New Caledonia)}, url = {https://m2.mtmt.hu/api/publication/32193288}, author = {Quemeneur, Marianne and Mei, Nan and Monnin, Christophe and Postec, Anne and Wils, Laura and Bartoli, Manon and Guasco, Sophie and Pelletier, Bernard and Erauso, Gael}, doi = {10.3390/microorganisms9071360}, journal-iso = {MICROORGANISMS}, journal = {MICROORGANISMS}, volume = {9}, unique-id = {32193288}, issn = {2076-2607}, abstract = {(1) Background: The geothermal spring of La Crouen (New Caledonia) discharges warm (42 degrees C) alkaline water (pH similar to 9) enriched in dissolved nitrogen with traces of methane, but its microbial diversity has not yet been studied. (2) Methods: Cultivation-dependent and -independent methods (e.g., Illumina sequencing and quantitative PCR based on 16S rRNA gene) were used to describe the prokaryotic diversity of this spring. (3) Results: Prokaryotes were mainly represented by Proteobacteria (57% on average), followed by Cyanobacteria, Chlorofexi, and Candidatus Gracilibacteria (GN02/BD1-5) (each > 5%). Both potential aerobes and anaerobes, as well as mesophilic and thermophilic microorganisms, were identified. Some of them had previously been detected in continental hyperalkaline springs found in serpentinizing environments (The Cedars, Samail, Voltri, and Zambales ophiolites). Gammaproteobacteria, Ca. Gracilibacteria and Thermotogae were significantly more abundant in spring water than in sediments. Potential chemolithotrophs mainly included beta- and gammaproteobacterial genera of sulfate-reducers (Ca. Desulfobacillus), methylotrophs (Methyloversatilis), sulfur-oxidizers (Thiofaba, Thiovirga), or hydrogen-oxidizers (Hydrogenophaga). Methanogens (Methanobacteriales and Methanosarcinales) were the dominant Archaea, as found in serpentinization-driven and deep subsurface ecosystems. A novel alkaliphilic hydrogenotrophic methanogen (strain CAN) belonging to the genus Methanobacterium was isolated, suggesting that hydrogenotrophic methanogenesis occurs at La Crouen.}, keywords = {BACTERIA; ARCHAEA; MICROBIAL DIVERSITY; methanogenesis; Methanobacterium; Alkaliphiles; hydrogenotrophy; alkaline spring}, year = {2021}, eissn = {2076-2607}, orcid-numbers = {Quemeneur, Marianne/0000-0003-4071-9848; Monnin, Christophe/0000-0002-9343-6414} } @article{MTMT:31746781, title = {In situ modelling of biofilm formation in a hydrothermal spring cave}, url = {https://m2.mtmt.hu/api/publication/31746781}, author = {Anda, Dóra and Szabó, Attila and Kovácsné Bodor, Petra and Makk, Judit and Felföldi, Tamás and Ács, Éva and Mádlné Szőnyi, Judit and Kériné Borsodi, Andrea}, doi = {10.1038/s41598-020-78759-4}, journal-iso = {SCI REP}, journal = {SCIENTIFIC REPORTS}, volume = {10}, unique-id = {31746781}, issn = {2045-2322}, abstract = {Attachment of microorganisms to natural or artificial surfaces and the development of biofilms are complex processes which can be influenced by several factors. Nevertheless, our knowledge on biofilm formation in karstic environment is quite incomplete. The present study aimed to examine biofilm development for a year under controlled conditions in quasi-stagnant water of a hydrothermal spring cave located in the Buda Thermal Karst System (Hungary). Using a model system, we investigated how the structure of the biofilm is formed from the water and also how the growth rate of biofilm development takes place in this environment. Besides scanning electron microscopy, next-generation DNA sequencing was used to reveal the characteristic taxa and major shifts in the composition of the bacterial communities. Dynamic temporal changes were observed in the structure of bacterial communities. Bacterial richness and diversity increased during the biofilm formation, and 9-12 weeks were needed for the maturation. Increasing EPS production was also observed from the 9-12 weeks. The biofilm was different from the water that filled the cave pool, in terms of the taxonomic composition and metabolic potential of microorganisms. In these karstic environments, the formation of mature biofilm appears to take place relatively quickly, in a few months.}, keywords = {COMMUNITIES; DATABASE; bacterial; DRIVEN; Budapest; diversity; thermal karst system}, year = {2020}, eissn = {2045-2322}, orcid-numbers = {Makk, Judit/0000-0001-5768-7622; Felföldi, Tamás/0000-0003-2009-2478; Ács, Éva/0000-0003-1774-157X; Mádlné Szőnyi, Judit/0000-0002-5628-4386; Kériné Borsodi, Andrea/0000-0002-3738-7937} } @article{MTMT:31649323, title = {Prevalence of methanogens in the uncultured Sikkim hot spring solfataric mud archaeal microbiome}, url = {https://m2.mtmt.hu/api/publication/31649323}, author = {Das, Sayak and Sherpa, Mingma Thundu and Najar, Ishfaq Nabi and Thakur, Nagendra}, doi = {10.1007/s42398-020-00133-x}, journal-iso = {ENVIRON SUSTAIN}, journal = {ENVIRONMENTAL SUSTAINABILITY}, volume = {.}, unique-id = {31649323}, year = {2020}, eissn = {2523-8922}, pages = {.} } @article{MTMT:31797381, title = {SELECTIVE ISOLATION OF Dactylosporangium AND Micromonospora FROM THE SOIL OF KARST CAVE OF SIMEULUE ISLAND AND THEIR ANTIBACTERIAL POTENCY}, url = {https://m2.mtmt.hu/api/publication/31797381}, author = {Putri, Ade Lia and Sumerta, I Nyoman}, doi = {10.14203/beritabiologi.v19i3A.3933}, journal-iso = {BERITA BIOLOGI}, journal = {BERITA BIOLOGI : JURNAL ILMU-ILMU HAYATI}, volume = {19}, unique-id = {31797381}, issn = {0126-1754}, year = {2020}, eissn = {2337-8751}, pages = {257-268} } @article{MTMT:31306981, title = {Investigation of a flowstone-like historical indoor-travertine (Rudas Spa, Budapest, Hungary) using the 14C "bomb-peak"}, url = {https://m2.mtmt.hu/api/publication/31306981}, author = {Virág, Magdolna and Molnár, Mihály and Braun, Mihály and Mindszenty, Andrea}, doi = {10.1017/RDC.2020.24}, journal-iso = {RADIOCARBON}, journal = {RADIOCARBON}, volume = {62}, unique-id = {31306981}, issn = {0033-8222}, abstract = {Travertine precipitated during the past ca. 120 years, from thermal waters in one of the historical Spas of the Buda Thermal Karst (Hungary) was investigated using radiocarbon (14C). The age of the deposit is based on the historic date of the structure on which the travertine was deposited. A textural study of the travertine buildup using a ~22-cm-long diamond-core crosscutting was undertaken. The original aim of the study was to improve our understanding of the controls and possibly also the rate of travertine-precipitation. In addition to characteristic, mm-scale, regular laminations, 0.5–1.0 cm dark-colored intervals were also observed in the core. Correlation of these latter textural changes with well-known changes in the water management of the Spa was greatly hindered by the lack of age data from the interior of the core. Therefore, in addition to the two known points (beginning in 1883 AD and ending 2004 AD) at least one age-datum point, somewhere inbetween, was necessary. Since the timespan of the core obviously included the 1960s of the last century, we expected that the 14C anomaly related to the atmospheric nuclear tests of those years could be detected by isotope-geochemistry. This paper gives a brief overview of the textural features of the investigated travertine and presents the dataset proving the incorporation of considerable amounts of atmospheric carbon in the carbonate precipitate, which, indeed, facilitated the indirect dating of the part of the core containing “bomb” 14C, and this helped us to unfold the factors controlling the observed textural changes of the travertine.}, keywords = {14C bomb-peak, Buda Thermal Karst, historical data collection, indoor-travertine, radiocarbon}, year = {2020}, eissn = {1945-5755}, pages = {1419-1435}, orcid-numbers = {Virág, Magdolna/0000-0001-6104-1963; Molnár, Mihály/0000-0003-4382-9508; Mindszenty, Andrea/0000-0001-8927-3053} } @article{MTMT:30539729, title = {Radioactive environment adapted bacterial communities constituting the biofilms of hydrothermal spring caves (Budapest, Hungary)}, url = {https://m2.mtmt.hu/api/publication/30539729}, author = {Lange-Enyedi, Nóra and Anda, Dóra and Kériné Borsodi, Andrea and Szabó, Attila and Pál, Sára Eszter and Óvári, Mihály and Márialigeti, Károly and Kovácsné Bodor, Petra and Mádlné Szőnyi, Judit and Makk, Judit}, doi = {10.1016/j.jenvrad.2019.02.010}, journal-iso = {J ENVIRON RADIOACTIV}, journal = {JOURNAL OF ENVIRONMENTAL RADIOACTIVITY}, volume = {203}, unique-id = {30539729}, issn = {0265-931X}, abstract = {The thermal waters of Gellért Hill discharge area of the Buda Thermal Karst System (Hungary) are characterized by high (up to 1000 Bq/L) 222Rn-activity due to the radium-accumulating biogeochemical layers. Samples were taken from these ferruginous and calcareous layers developed on spring cave walls and water surface. Accumulation of potentially toxic metals (e.g. As, Hg, Pb, Sn, Sr, Zn) in the dense extracellular polymeric substance containing bacterial cells and remains was detected by inductively coupled plasma mass spectrometry. The comparison of bacterial phylogenetic diversity of the biofilm samples was performed by high throughput next generation sequencing (NGS). The analysis showed similar sets of mainly unidentified taxa of phyla Chloroflexi, Nitrospirae, Proteobacteria, Planctomycetes; however, large differences were found in their abundance. Cultivation-based method complemented with irradiation assay was performed using 5, 10 and 15 kGy doses of gamma-rays from a 60Co-source to reveal the extreme radiation-resistant bacteria. The phyla Actinobacteria, Firmicutes, Proteobacteria (classes Alpha- Beta- and Gammaproteobacteria), Bacteriodetes and Deinococcus-Thermus were represented among the 452 bacterial strains. The applied irradiation treatments promoted the isolation of 100 different species, involving candidate novel species, as well. The vast majority of the isolates belonged to bacterial taxa previously unknown as radiation-resistant microorganisms. Members of the genera Paracoccus, Marmoricola, Dermacoccus and Kytococcus were identified from the 15 kGy dose irradiated samples. The close relatives of several known radiation-tolerant bacteria were also detected from the biofilm samples, alongside with bacteria capable of detoxification by metal accumulation, adsorption and precipitation in the form of calcium-carbonate which possibly maintain the viability of the habitat. The results suggest the establishment of a unique, extremophilic microbiota in the studied hydrothermal spring caves.}, keywords = {Biofilm; Thermal spring; Toxic metals; High level radioactivity; Radiation-resistant bacteria}, year = {2019}, eissn = {1879-1700}, pages = {8-17}, orcid-numbers = {Kériné Borsodi, Andrea/0000-0002-3738-7937; Márialigeti, Károly/0000-0003-1536-5160; Mádlné Szőnyi, Judit/0000-0002-5628-4386; Makk, Judit/0000-0001-5768-7622} } @mastersthesis{MTMT:31324249, title = {The inhibitory effect of the methanolic extracts of Origanum syriacum and Rosmarinus officinalis and their major components on the biofilm formation of clinical isolates of Staphylococcus aureus}, url = {https://m2.mtmt.hu/api/publication/31324249}, author = {Reeda, Shawkat Harb}, unique-id = {31324249}, year = {2019} } @misc{MTMT:31828993, title = {ANÁLISIS DEL MICROBIOMA DEL MANANTIAL DE AGUAS TERMALES AZUFRADAS “TANINUL” DE LA HUASTECA POTOSINA}, url = {https://m2.mtmt.hu/api/publication/31828993}, author = {González-Escobar, Jorge Luis and González-Purata, Perla Yanet and Veana-Hernández, Fabiola}, unique-id = {31828993}, year = {2018} }