Gesche Braker
Dr. Gesche Braker
MPI für terrestrische Mikrobiologie
Karl-von-Frisch-Straße
D-35043 Marburg / Germany
Phone: +49 6421 178733
Fax: +49 6421 178999
Email: braker@mpi-marburg.mpg.de
Research group members
Group Leader: Dr. Gesche Braker
PhD students:Lima Amanda Barbosa, Jenny Pratscher
Master student: Jan Petasch
Technical assistant: Sabine Tippmann
Dr. Gesche Braker
Curriculum Vitae
Gesche Braker (born 1966)
Diploma (Biology), University of Kiel, 1995
Visting Graduate Student, Center for Microbial Ecology, Michigan State University, USA, 1997-1998
Dr. rer. nat. (Microbiology), University of Kiel, 1999
Research Associate, Center for Microbial Ecology, Michigan State University, USA, 2000-2001
Senior Research Associate, MPI Marburg, 2001-2004
Group leader at the Department of Biogeochemistry, MPI Marburg, since 11/2004
Research Area: Ecology of denitrifying microorganisms - Communities and their functioning
Denitrifying microorganisms play a key role in the global nitrogen cycle. Denitrification is one of the main processes of this cycle and trace gases (NO, N2O) originating from it cause well known climatic effects. Especially soils are a dominant source of atmospheric N2O and denitrification processes contribute approximately 57% to the total annual global emission. Denitrifiers are also responsible for nitrogen losses from agriculturally used fertilized soils and therefore limit the availability of nitrogen for plants in soils.
More about "Ecology of denitrifiers: Communities and their functioning"
Recent publications
Pratscher J, Stichternoth C, Fichtl K, Schleifer KH, Braker G.(2009) Application of recognition of individual genes-fluorescence in situ hybridization (RING-FISH) to detect nitrite reductase genes (nirK) of denitrifiers in pure cultures and environmental samples. Appl Environ Microbiol. 2009 75(3):802-10
Sorokin, D.Y., Tourova, T.P., Braker, G., and Muyzer, G. (2007) Thiohalomonas denitrificans gen. nov., sp. nov. and Thiohalomonas nitratireducens sp. nov., novel obligately chemolithoautotrophic, moderately halophilic, thiodenitrifying Gammaproteobacteria from hypersaline habitats. Int. J. Syst. Evol. Microbiol., 57: 1582 - 1589.
Falk, S., Hannig, M., Gliesche, C., Wardenga, R., Köster, M., Jürgens, K., and Braker, G. (2007) nirS-containing denitrifier communities in the water column and sediment of the Baltic Sea. Biogeosciences, 4: 255-268.
Bremer, C., Braker, G., Matthies, D., Reuter, A., Engels, C., and Conrad, R. (2007) Impact of plant functional group, plant species, and sampling time on the composition of nirK-type denitrifier communities in soil. Appl. Envir. Microbiol. 73: 6876-6884
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TRF-CUT - An ARB software-integrated tool for in silico terminal restriction fragment length polymorphism (T-RFLP) analysis (Appl. Environ. Microbiol. 2005;71(3):1671-3).
TRF-CUT allows to predict in silico the terminal restriction fragments (T-RFs) of aligned small-subunit rRNA gene or functional gene sequences using any restriction endonuclease with an unambiguous restriction site. TRF-CUT is suitable to select enzymes with high phylogenetic resolution and assigning T-RFs from experimental T-RFLP data to potentially corresponding sequences in the database. The ARB upgrade with TRF-CUT is simple and does not alter the ARB source code.
Download the TRF-CUT software including a manual