79 documents found

Dissertation
All rights reserved
2020

An investigation into diet and economy in ancient Mongolia through multiple...

This dissertation explores the dietary histories of ancient Mongolia through the study of stable isotope and protein analyses, with a specific focus on the origins of dairy pastoralism and cereal grain cultivation on the eastern Eurasian steppe. In contemporary Mongolia, dairy pastoralism is a frequently...
Dissertation
CC BY-NC-ND 4.0
2020

Transcriptional regulation of tetrachloroethene respiration in Sulfurospirillum...

Energy conservation via organohalide respiration (OHR), comprising the reductive dehalogenation of halogenated organic compounds, is an inducible process in OHR capable Sulfurospirillum species. This work adds a first global RNA sequence of the well-studied Sulfurospirillum multivorans, a proteome and...
Dissertation
CC BY 4.0
2020

Genetic modification of heavy metal resistant Streptomyces sp. strains

Two heavy metal resistant Streptomyces sp. strains, S. mirabilis P16 B-1 and S. acidiscabies E13, isolated from a former uranium mining site are investigated for genetic metal resistance determinants. After establishing a transformation system for Streptomyces sp. using conjugation with E. coli, the...
Dissertation
CC BY 4.0
2020

Isolation and characterization of novel biomolecules during the mutualistic...

The endophytic fungus Piriformospora indica can form beneficial interaction with many different plant species including Arabidopsis thaliana. This interaction has similarities to mycorrhiza, can improve the plant fitness, and can result in a higher biomass production. This work was focused on the perception...
Dissertation
CC BY-NC-ND 4.0
2020

Secondary metabolites in the interaction of Aspergillus fumigatus and Pseudomonas...

Aspergillus fumigatus and Pseudomonas aeruginosa are the most persistent fungal and bacterial pathogens, respectively, commonly co-isolated from the expectorated sputum of cystic fibrosis (CF) patients. Co-colonisation by both microbes has been associated with a worse clinical outcome and a poorer prognosis...
Dissertation
CC BY 4.0
2020

Adaptive strategies of Enterococcus mundtii to different living conditions...

The symbiotic microbial consortium in the gut of Spodoptera littoralis shows dramatic, but reproducible changes in line with the development of the insect from the egg via six larval instars to the pupa. Since the food is kept constant during development, factors from the insect host and certain microbial...
Dissertation
CC BY-ND 3.0
2019

Investigations on indigenous microorganisms isolated from a former uranium...

Schwermetall- und Radionuklidkontaminationen von Böden und Gewässern sind zum Großteil das Ergebnis ehemaliger Bergbau- und Metallgewinnungsindustrien und stellen weltweit ein ernstzunehmendes Problem dar. Im Rahmen dieser Arbeit wurden Untersuchungen durchgeführt, um auf dem Gelände der ehemaligen Uranmine...
Dissertation
CC BY 3.0
2019

Photoresponsive modulation of a freshwater phytoplankton community by bacterial...

Photoreactive lipopeptide siderophores are intriguing compounds that are well-known from the marine environment. Once they have complexed Fe3+, these compounds undergo photooxidative cleavage, thereby releasing Fe2+ into the environment. The solubilized iron is then not only available to the siderophore...
Dissertation
CC BY-NC-ND 3.0
2019

Adaptation strategies of Aspergillus species to environmental challenges

Evolution shaped the adaptability of Aspergilli to diverse stress conditions, such as low temperature or adaptation to hostile environments. We applied different assays and multi-omics approaches to gain deeper understanding about these strategies. The determination of intracellular ATP levels during...
Dissertation
All rights reserved
2019

Regulation of basidiomycete small molecules during co-culturing

There is an increasing interest in microbial biological systems, the competition or cooperation within, and ensuing natural products that may be produced or suppressed. The focus of this work was to understand the role and regulation of basidiomycete natural products in co-cultures. Ecologically relevant...
Dissertation
All rights reserved
2019

Inositol phosphate in the basidiomycete fungus Schizophyllum commune

4207 Bei der vorliegenden Dissertation handelt es sich um die erste Forschungsarbeit zur inositolbasierten Signaltransduktion im Basidiomyzeten S. commune. Des Weiteren befasst sich die Arbeit mit der Rolle der Inositolmonophosphatase bei der Signaltransduktion. Durch die Verbindung von In-silico-Analyse...
Dissertation
CC BY 3.0
2018

Microbial communities at a gasworks site : a marker gene- and cultivation-base ...

Environmental pollutants such as BTEX (benzene, toluene, ethylbenzene, o-, m-, p-xylene) and other aromatic compounds are frequently detected at gasworks sites. The diversity and functioning of aromatic compound-degrading bacteria (ACDB) was investigated in the groundwater of a former Thuringian gasworks...
Dissertation
All rights reserved
2018

Development and role of the indigenous gut microbiota of Spodoptera littoralis

Microbial symbionts are known to live in close associations with animals, plants, and insects. Insects harbor commensal microbes that provide the host with essential nutrients, aid in food digestion, and protection against pathogens. The cotton leafworm, Spodoptera littoralis (Lepidoptera: Noctuidae)...
Dissertation
CC BY 3.0
2018

Nonrandom mating in Nicotiana attenuata and the paternal influence on seed...

In Nicotiana attenuata, after equal amounts of pollen from genetically different wild donors were simultaneously loaded onto the stigma, maternal plants (UtWT, Utah, USA) selected for self pollen in binary mixed pollinations. Furthermore, between two cross pollen donors (G2 and G10, Utah, USA), UtWT...
Dissertation
CC BY 3.0
2018

On the composition and function of the gut microbiome of two insect species,...

Stable Isotope Probing (SIP) using cellulose and urea as trophic links pointed towards the bacterial families Lachnospiraceae and Enterococcaceae in larvae and Enterobacteriaceae in adults as involved in cellulose processing. The genus Burkholderia in larvae and the genus Parabacteroides in adults were...
Dissertation
CC BY-ND 3.0
2018

Mechanistic and metabolic basis of bacterial cross-feeding

In their natural habitat, microorganisms interact with a variety of micro- as well as macroorganisms. Such interactions result in either positive or negative effects on the growth and survival of involved species. Negative effects on growth, can be mostly attributed to competition for limited resources...
Dissertation
All rights reserved
2018

Role of micronutrients during fungal infections

Trace metals serve as structural and catalytic cofactors for numerous proteins and thus are crucial for all living organisms. Iron is the fourth most abundant element in the Earth’s crust and the most abundant metal in humans. The presence of redox active iron in living systems is critical for oxygen...
Dissertation
All rights reserved
2017-12-11

The influence of silver birch vegetation on the metal availability in mining...

The work aimed the experimental study of the metal bioavailability in soil and soil solution under the influence of birch vegetation in a mesoscale pot experiment. The substrate used therein originated from a mining affected site that was mainly contaminated with Al and Cu and vast free of vegetation,...
Dissertation
CC BY 3.0
2017-12

Elucidation of the microbial N-cycle in the subsurface : key microbial players ...

Despite the high relevance of anaerobic ammonia oxidation (anammox) for reactive nitrogen removal from marine systems, its relative importance compared to denitrification has only rarely been studied in aquifers. Comparative investigations were carried out in two superimposed aquifers in the Hainich...
Dissertation
All rights reserved
2017

Hydrobiogeochemical impact of the underground mining discharges in Gessental,...

This work deals with the evaluation of the impact of AMD (acid mine drainage) influenced discharges in the main discharge area Gessental of the former U mining area Ronneburg. Here, AMD from heaps at the south of Gessental, infiltrated into stream- and floodplain sediments. This is due to an influent...