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2010

Marine Biotechnology: Sustainable uses of marine bacteria and fungi

Wiese, J., Baumann, H. I., Kajahn, I., Labes, A., Ohlendorf, B., Schmaljohann, R., … Imhoff, J. F. (2010). Marine Biotechnology: Sustainable uses of marine bacteria and fungi. In ESF-COST High Level Research Conference. Abgerufen von http://oceanrep.geomar.de/10246/
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2010

Conference Paper

Jutta Wiese

Heike Baumann

Inga Kajahn

Antje Labes

Birgit Ohlendorf

Rolf Schmaljohann

Dirk Schulz

Rüdiger Stöhr

Heidi Zinecker

Johannes Imhoff

Microbiology

biotechnology

marine fungi

Marine bacteria
Chemical interactions between marine macroalgae and bacteria

Goecke, F. R., Labes, A., Wiese, J., & Imhoff, J. F. (2010). Chemical interactions between marine macroalgae and bacteria. Marine Ecology Progress Series, 409, 267–299. Abgerufen von http://oceanrep.geomar.de/8734/

Abstract

We review research from the last 40 yr on macroalgal?bacterial interactions. Marine macroalgae have been challenged throughout their evolution by microorganisms and have developed in a world of microbes. Therefore, it is not surprising that a complex array of interactions has evolved between macroalgae and bacteria which basically depends on chemical interactions of various kinds. Bacteria specifically associate with particular macroalgal species and even to certain parts of the algal body. Although the mechanisms of this specificity have not yet been fully elucidated, ecological functions have been demonstrated for some of the associations. Though some of the chemical response mechanisms can be clearly attributed to either the alga or to its epibiont, in many cases the producers as well as the mechanisms triggering the biosynthesis of the biologically active compounds remain ambiguous. Positive macroalgal?bacterial interactions include phytohormone production, morphogenesis of macroalgae triggered by bacterial products, specific antibiotic activities affecting epibionts and elicitation of oxidative burst mechanisms. Some bacteria are able to prevent biofouling or pathogen invasion, or extend the defense mechanisms of the macroalgae itself. Deleterious macroalgal?bacterial interactions induce or generate algal diseases. To inhibit settlement, growth and biofilm formation by bacteria, macroalgae influence bacterial metabolism and quorum sensing, and produce antibiotic compounds. There is a strong need to investigate the bacterial communities living on different coexisting macroalgae using new technologies, but also to investigate the production, localization and secretion of the biological active metabolites involved in those possible ecological interactions.
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2010

Journal Article

Franz Goecke

Antje Labes

Jutta Wiese

Johannes Imhoff

Microbiology

Marine microoganisms

Defense

Beneficial communication

Biofilms

Oxidative burst

Antibiotic activity

Quorum sensing control

GREEN-ALGA ULVA

GRACILARIA-CONFERTA RHODOPHYTA

MAKONBU LAMINARIA-JAPONICA

ICE-ICE DISEASE

KAPPAPHYCUS-ALVAREZII GIGARTINALES

PRIONITIS-LANCEOLATA RHODOPHYTA

SEAWEED SECONDARY METABOLITES

CHONDRUS-CRISPUS RHODOPHYTA

CROSS-SPECIES INDUCTION

GRAM-NEGATIVE BACTERIA
New drugs in oncology from marine bacteria and fungi

Wiese, J., Baumann, H. I., Labes, A., Ohlendorf, B., Schmaljohann, R., Schulz, D., … Imhoff, J. F. (2010). New drugs in oncology from marine bacteria and fungi. In AIO-Symposium "Academic Drug Development in Oncology ? Translating Basic Science Research Into Innovative Treatments". Abgerufen von http://oceanrep.geomar.de/10235/
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2010

Conference Paper

Jutta Wiese

Heike Baumann

Antje Labes

Birgit Ohlendorf

Rolf Schmaljohann

Dirk Schulz

Rüdiger Stöhr

Johannes Imhoff

Microbiology

oncology

Marine bacteria

Fungi
Comprehensive Investigation of Marine Actinobacteria Associated with the Sponge Halichondria panicea

Schneemann, I., Nagel, K., Kajahn, I., Labes, A., Wiese, J., & Imhoff, J. F. (2010). Comprehensive Investigation of Marine Actinobacteria Associated with the Sponge Halichondria panicea. Applied and Environmental Microbiology, 76, 3702–3714. Abgerufen von http://oceanrep.geomar.de/8488/

Abstract

Representatives of Actinobacteria were isolated from the marine sponge Halichondria panicea collected from the Baltic Sea (Germany). For the first time, a comprehensive investigation was performed with regard to phylogenetic strain identification, secondary metabolite profiling, bioactivity determination, and genetic exploration of biosynthetic genes, especially concerning the relationships of the abundance of biosynthesis gene fragments to the number and diversity of produced secondary metabolites. All strains were phylogenetically identified by 16S rRNA gene sequence analyses and were found to belong to the genera Actinoalloteichus, Micrococcus, Micromonospora, Nocardiopsis, and Streptomyces. Secondary metabolite profiles of 46 actinobacterial strains were evaluated, 122 different substances were identified, and 88 so far unidentified compounds were detected. The extracts from most of the cultures showed biological activities. In addition, the presence of biosynthesis genes encoding polyketide synthases (PKSs) and nonribosomal peptide synthetases (NRPSs) in 30 strains was established. It was shown that strains in which either PKS or NRPS genes were identified produced a significantly higher number of metabolites and exhibited a larger number of unidentified, possibly new metabolites than other strains. Therefore, the presence of PKS and NRPS genes is a good indicator for the selection of strains to isolate new natural products.
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2010

Journal Article

Imke Schneemann

Kerstin Nagel

Inga Kajahn

Antje Labes

Jutta Wiese

Johannes Imhoff

Microbiology

Biology

BIOSYNTHESIS GENE-CLUSTER

COMPLETE GENOME SEQUENCE

STREPTOMYCES SP

BIOLOGICAL PROPERTIES

POLYKETIDE SYNTHASE

NATURAL-PRODUCTS

PSEUDOCERATINA-CLAVATA

ANTIMYCIN ANTIBIOTICS

STRUCTURE ELUCIDATION

CHONDRILLA-NUCULA
Pseudomonads in association with Saccharina latissima ? evidence of a beneficial interaction in marine environments?

Nagel, K., Schneemann, I., Kajahn, I., Wiese, J., Labes, A., & Imhoff, J. F. (2010). Pseudomonads in association with Saccharina latissima ? evidence of a beneficial interaction in marine environments? In International VAAM-Workshop "Biology of bacteria producing natural products". Abgerufen von http://oceanrep.geomar.de/10252/
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2010

Conference Paper

Kerstin Nagel

Imke Schneemann

Inga Kajahn

Jutta Wiese

Antje Labes

Johannes Imhoff

Microbiology

Saccharina latissima

marine environment
Efficient screening for secondary metabolites in marine fungi using biosynthetic genes

Labes, A., Klotz, H., Schneemann, I., & Imhoff, J. F. (2010). Efficient screening for secondary metabolites in marine fungi using biosynthetic genes. In CEBITEC Symposium. Abgerufen von http://oceanrep.geomar.de/10245/
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2010

Conference Paper

Antje Labes

H. Klotz

Imke Schneemann

Johannes Imhoff

Microbiology

marine fungi

metabolites

biosynthetic genes

2009

Novel thermoacidophilic chitinase from the crenarchaeon Sulfolobus tokodaii

Staufenberger, T., Labes, A., & Imhoff, J. F. (2009). Novel thermoacidophilic chitinase from the crenarchaeon Sulfolobus tokodaii. 9th International Conference of the European Chitin Society. Abgerufen von http://oceanrep.geomar.de/975/
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2009

Unpublished

Tim Staufenberger

Antje Labes

Johannes Imhoff
Screening for chitin degrading microorganism in different marine habitats

Staufenberger, T., Heindl, H., Gärtner, A., Labes, A., & Imhoff, J. F. (2009). Screening for chitin degrading microorganism in different marine habitats. VAAM Jahrestagung. Abgerufen von http://oceanrep.geomar.de/2727/
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2009

Unpublished

Tim Staufenberger

Herwig Heindl

Andrea Gärtner

Antje Labes

Johannes Imhoff

Poster
Variability of the algae-associated bacterial communities among coexisting Fucus vesiculosus (Phaephyceae) and Delesseria sanguinea (Rhodophyta) in the Baltic Sea

Goecke, F. R., Wiese, J., Labes, A., & Imhoff, J. F. (2009). Variability of the algae-associated bacterial communities among coexisting Fucus vesiculosus (Phaephyceae) and Delesseria sanguinea (Rhodophyta) in the Baltic Sea. VAAM Jahrestagung. Abgerufen von http://oceanrep.geomar.de/2324/
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2009

Unpublished

Franz Goecke

Jutta Wiese

Antje Labes

Johannes Imhoff

Poster
Biological role of secondary metabolites from marine microorganisms

Baumann, H. I., Wiese, J., Gärtner, A., Goecke, F. R., Heindl, H., Kajahn, I., … Imhoff, J. F. (2009). Biological role of secondary metabolites from marine microorganisms. VAAM-Symposium "Symbiotische Interaktionen". Abgerufen von http://oceanrep.geomar.de/3859/
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2009

Unpublished

Heike Baumann

Jutta Wiese

Andrea Gärtner

Franz Goecke

Herwig Heindl

Inga Kajahn

Katrin Kleinschmidt

Antje Labes

Kerstin Nagel

Sven Neulinger

Birgit Ohlendorf

Imke Schneemann

Dirk Schulz

Tim Staufenberger

Vera Thiel

Heidi Zinecker

Johannes Imhoff

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2010

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