AME 67:239-249 (2012)  -  DOI: https://doi.org/10.3354/ame01595

Beneficial effects of 2,4-diacetylphloroglucinol- producing pseudomonads on the marine alga Saccharina latissima

Kerstin Nagel, Imke Schneemann, Inga Kajahn, Antje Labes, Jutta Wiese, Johannes F. Imhoff*

Kieler Wirkstoff-Zentrum (KiWiZ) am Helmholtz-Zentrum für Ozeanforschung (GEOMAR), Am Kiel-Kanal 44, 24106 Kiel, Germany

ABSTRACT: Pseudomonas strains were shown to be regularly associated with the brown macroalga Saccharina latissima from the Baltic Sea, studied over several years, and were identified as producers of the antimicrobially active compound 2,4-diacetylphloroglucinol. These findings support the assumption of a stable association between the Pseudomonas spp. strains and S. latissima in the Baltic Sea. The metabolite profile of the Pseudomonas spp. comprised monoacetylphloroglucinol, 2,4-diacetylphloroglucinol, pyoluteorin and several rhizoxins, which exhibited broad-spectrum antibiotic activities against Gram-positive and Gram-negative bacteria as well as against fungi. Because the antibiotic activities included the inhibition of the 2 algal pathogens Pseudoalteromonas elyakovii and Algicola bacteriolytica, we propose a beneficial effect of these marine pseudomonads on their host S. latissima.


KEY WORDS: Pseudomonas protegens · Alga–bacteria association · 2,4-diacetylphloroglucinol · Pyoluteorin · Rhizoxin · Brown macroalgae


Full text in pdf format 
Cite this article as: Nagel K, Schneemann I, Kajahn I, Labes A, Wiese J, Imhoff JF (2012) Beneficial effects of 2,4-diacetylphloroglucinol- producing pseudomonads on the marine alga Saccharina latissima. Aquat Microb Ecol 67:239-249. https://doi.org/10.3354/ame01595

Export citation
Mail this link - Contents Mailing Lists - RSS
- -