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*
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
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