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• W2015202887 abstract "ABSTRACT Bacterium-bacterium interactions occur at intimate spatial scales on the order of micrometers, but our knowledge of interactions at this level is rudimentary. Antagonism is a potential interaction in such microenvironments. To study the ecological role of antibiosis, we developed a model system involving an antibiotic-producing isolate (SWAT5) derived from a marine particle and its dominant antibiotic product, 2- n -pentyl-4-quinolinol (PQ). This system was used to address questions about the significance of this antibiotic for microbial ecology and carbon cycling on particles. We characterized the chemical and inhibitory properties of PQ in relation to the mechanisms used by particle-associated bacteria in interacting with particles and with other attached bacteria. PQ was produced by SWAT5 only on surfaces. When SWAT5 was grown in polysaccharide matrices, PQ diffused within the matrices but not into the surrounding seawater. SWAT5 might thus be able to generate a localized zone of high antibiotic concentration on particles suspended or sinking through seawater. Target bacterial respiration was most sensitive to PQ (75 nM), while inhibition of DNA synthesis, protein synthesis, and bacterial motility required higher (micromolar) PQ levels. The presence of PQ altered the composition of the bacterial community that colonized and developed in a model particle system. PQ also inhibited Synechococcus and phytoplankton growth. Our results suggest that antibiosis may significantly influence community composition and activities of attached bacterial and thus regulate the biogeochemical fate of particulate organic matter in the ocean." @default.
• W2015202887 created "2016-06-24" @default.
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• W2015202887 date "2003-01-01" @default.
• W2015202887 modified "2023-10-04" @default.
• W2015202887 title "2- <i>n</i> -Pentyl-4-Quinolinol Produced by a Marine <i>Alteromonas</i> sp. and Its Potential Ecological and Biogeochemical Roles" @default.
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• W2015202887 doi "https://doi.org/10.1128/aem.69.1.568-576.2003" @default.
• W2015202887 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/152395" @default.
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