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499 results on '"Maróti, Gergely"'

110. A glimpse of antimicrobial resistance gene diversity in kefir and yoghurt

Author

Tóth, Adrienn Gréta, primary, Csabai, István, additional, Maróti, Gergely, additional, Jerzsele, Ákos, additional, Dubecz, Attila, additional, Patai, Árpád V., additional, Nagy, Sára Ágnes, additional, Makrai, László, additional, Bányai, Krisztián, additional, Szita, Géza, additional, and Solymosi, Norbert, additional

Published
2020
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111. Impact of Rap-Phr system abundance on adaptation of Bacillus subtilis

Author

Gallegos-Monterrosa, Ramses, primary, Christensen, Mathilde Nordgaard, additional, Barchewitz, Tino, additional, Koppenhöfer, Sonja, additional, Priyadarshini, B., additional, Bálint, Balázs, additional, Maróti, Gergely, additional, Kempen, Paul J, additional, Dragoš, Anna, additional, and Kovács, Ákos T., additional

Published
2020
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113. Genomic and chemical diversity ofBacillus subtilissecondary metabolites against plant pathogenic fungi

Author

Kiesewalter, Heiko T., primary, Lozano-Andrade, Carlos N., additional, Wibowo, Mario, additional, Strube, Mikael L., additional, Maróti, Gergely, additional, Snyder, Dan, additional, Jørgensen, Tue Sparholt, additional, Larsen, Thomas O., additional, Cooper, Vaughn S., additional, Weber, Tilmann, additional, and Kovács, Ákos T., additional

Published
2020
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120. Correction to: Collapse of genetic division of labour and evolution of autonomy in pellicle biofilms

Author

Dragoš, Anna, Martin, Marivic, Garcia, Carolina Falcón, Kricks, Lara, Pausch, Patrick, Heimerl, Thomas, Bálint, Balázs, Maróti, Gergely, Bange, Gert, López, Daniel, Lieleg, Oliver, and Kovács, Ákos T.

Abstract

In the version of this Article originally published, author Carolina Falcón Garcia’s name was coded wrongly, resulting in it being incorrect when exported to citation databases. This has now been corrected, though no visible changes will be apparent.

Published
2019

124. Characterization of a biogas-producing microbial community by short-read next generation DNA sequencing

Author

Wirth Roland, Kovács Etelka, Maróti Gergely, Bagi Zoltán, Rákhely Gábor, and Kovács Kornél L

Subjects
Biogas, Next-generation sequencing, DNA, Microbial community structure, Bacteria, Methanogens, SOLiD™, Metagenomics, Hydrogen metabolism, Fuel, TP315-360, Biotechnology, TP248.13-248.65
Abstract

Abstract Background Renewable energy production is currently a major issue worldwide. Biogas is a promising renewable energy carrier as the technology of its production combines the elimination of organic waste with the formation of a versatile energy carrier, methane. In consequence of the complexity of the microbial communities and metabolic pathways involved the biotechnology of the microbiological process leading to biogas production is poorly understood. Metagenomic approaches are suitable means of addressing related questions. In the present work a novel high-throughput technique was tested for its benefits in resolving the functional and taxonomical complexity of such microbial consortia. Results It was demonstrated that the extremely parallel SOLiD™ short-read DNA sequencing platform is capable of providing sufficient useful information to decipher the systematic and functional contexts within a biogas-producing community. Although this technology has not been employed to address such problems previously, the data obtained compare well with those from similar high-throughput approaches such as 454-pyrosequencing GS FLX or Titanium. The predominant microbes contributing to the decomposition of organic matter include members of the Eubacteria, class Clostridia, order Clostridiales, family Clostridiaceae. Bacteria belonging in other systematic groups contribute to the diversity of the microbial consortium. Archaea comprise a remarkably small minority in this community, given their crucial role in biogas production. Among the Archaea, the predominant order is the Methanomicrobiales and the most abundant species is Methanoculleus marisnigri. The Methanomicrobiales are hydrogenotrophic methanogens. Besides corroborating earlier findings on the significance of the contribution of the Clostridia to organic substrate decomposition, the results demonstrate the importance of the metabolism of hydrogen within the biogas producing microbial community. Conclusions Both microbiological diversity and the regulatory role of the hydrogen metabolism appear to be the driving forces optimizing biogas-producing microbial communities. The findings may allow a rational design of these communities to promote greater efficacy in large-scale practical systems. The composition of an optimal biogas-producing consortium can be determined through the use of this approach, and this systematic methodology allows the design of the optimal microbial community structure for any biogas plant. In this way, metagenomic studies can contribute to significant progress in the efficacy and economic improvement of biogas production.

Published
2012
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127. Microaerobic conditions caused the overwhelming dominance of Acinetobacter spp. and the marginalization of Rhodococcus spp. in diesel fuel/crude oil mixture-amended enrichment cultures

Author

Révész, Fruzsina, primary, Figueroa-Gonzalez, Perla Abigail, additional, Probst, Alexander J., additional, Kriszt, Balázs, additional, Banerjee, Sinchan, additional, Szoboszlay, Sándor, additional, Maróti, Gergely, additional, and Táncsics, András, additional

Published
2019
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134. Perturbation of the mucosa-associated anaerobic gut micro-biota in streptozotocin-induced diabetic rats.

Author

Wirth, Roland, Bódi, Nikolett, Szalai, Zita, Chandrakumar, Lalitha, Maróti, Gergely, Kovács, Kornél L., Bagi, Zoltán, Mezei, Diána, Balázs, János, and Bagyánszki, Mária

Subjects
GUT microbiome, DNA sequencing, RATS, HYPERGLYCEMIA, GLYCEMIC control, ANIMAL disease models, COLON (Anatomy)
Abstract

Our aim was to map the gut region-specific differences of the mucosa-associated microbiome distribution in a streptozotocin-induced diabetic rat model. Tissue samples from the duodenum, ileum and colon were collected 10 weeks after the onset of hyperglycaemia to analyse the mucosa-associated microbiota using next-generation DNA sequencing. Striking differences were observed in the mucosa-associated microbiota of the duodenum between diabetic and control rats. A significant invasion of the aerobic genus Mycoplasma was apparent in diabetes, and the abundance of the anaerobic phylum Firmicutes decreased massively. It is noteworthy that insulin treatment eliminated the Mycoplasma invasion in the duodenum and apparently restored the anaerobic environment in the mucosa. In the ileum the abundance of the phylum Firmicutes increased in the diabetic samples. Although the proportion of the phylum Proteobacteria decreased moderately, its composition changed significantly, and insulin treatment induced only minor alterations. In the diabetic samples of colon, the abundance of the phylum Firmicutes decreased slightly, the relative number of the bacteria in the phylum Bacteroidetes increased strongly as compared to the control values, and after insulin treatment this increase was more significant. Chronic hyperglycaemia has the most prominent effect on the mucosa-associated microbiota in the duodenum. [ABSTRACT FROM AUTHOR]

Published
2021
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140. Pervasive prophage recombination occurs during evolution of spore-forming Bacilli

Author

Dragoš, Anna, Priyadarshini, B, Hasan, Zahraa, Strube, Mikael Lenz, Kempen, Paul J, Maróti, Gergely, Kaspar, Charlotte, Bose, Baundauna, Burton, Briana M, Bischofs, Ilka B, and Kovács, Ákos T

Abstract

Phages are the main source of within-species bacterial diversity and drivers of horizontal gene transfer, but we know little about the mechanisms that drive genetic diversity of these mobile genetic elements (MGEs). Recently, we showed that a sporulation selection regime promotes evolutionary changes within SPß prophage of Bacillus subtilis, leading to direct antagonistic interactions within the population. Herein, we reveal that under a sporulation selection regime, SPß recombines with low copy number phi3Ts phage DNA present within the B. subtilispopulation. Recombination results in a new prophage occupying a different integration site, as well as the spontaneous release of virulent phage hybrids. Analysis of Bacillussp. strains suggests that SPß and phi3T belong to a distinct cluster of unusually large phages inserted into sporulation-related genes that are equipped with a spore-related genetic arsenal. Comparison of Bacillussp. genomes indicates that similar diversification of SPß-like phages takes place in nature. Our work is a stepping stone toward empirical studies on phage evolution, and understanding the eco-evolutionary relationships between bacteria and their phages. By capturing the first steps of new phage evolution, we reveal striking relationship between survival strategy of bacteria and evolution of their phages.

Published
2021
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141. METAGENOMICS INVESTIGATION OF ANAEROBIC DEGRADATION ECOSYSTEMS

Author

Papp, Bernadett, Lakatos, Gergely, Nagy, Péter Tamás, Boboescu, Iulian Zoltán, and Maróti, Gergely

Subjects
metagenomics, Research and Development/Tech Change/Emerging Technologies, Anaerobic digestion, methane, syntrophic interactions, biogas, microbial community
Abstract

Biomethane has gained increasing attention in the recent years as an alternative, local energy source option. Biogas is generated during the anaerobic digestion of organic materials via a multistep process catalyzed by complex microbial communities. This review aims at providing a concise summary of recent studies on the microbial communities in various biogas reactors. The effects of acid composition, C/N ratio, mixing and the geometry of the anaerobic digester on the microbial ecosystem are discussed. The biogas microbial communities show extensive fluctuations in response to changes in temperature, substrate type, pH, type of volatile fatty acids, organic loading rate, etc. The goals to ensure efficient anaerobic degradation and to maximize the biogas production require the better understanding of these bacterial-archaeal ecosystems, since functional stability strongly correlates with the state and composition of microbial communities. The safe and controlled intensification of biogas production would be an important step to make biogas a real competitor of fossil fuels.

Published
2016
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143. ALGAE USE FOR BIOHYDROGEN - AND BIOGAS PRODUCTION

Author

Lakatos, Gergely, Papp, Bernadett, Nagy, Péter Tamás, and Maróti, Gergely

Subjects
Research and Development/Tech Change/Emerging Technologies, Resource /Energy Economics and Policy
Abstract

Anaerobic digestion of microalgae has a real potential for feasible production of biogas. However, algae biomass production and the elimination of biogas production residual need considerable energy and nutrient utilization. By the application of algal-bacterial method hydrogen can be produced as an energy carrier, while the liquid phase of biogas sludge and the emitted carbon-dioxide can be recycled. This review focuses on the possible co-application and merging of biogas and biohydrogen production technologies for the further optimization of an environmentally friendly hybrid solution.

Published
2016
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