The impact of culture medium on the development and physiology of biofilms ofPseudomonas fluorescensformed on polyurethane paint
Autor: | Kristi M. Singh, Harold D. Ladouceur, Hamish L. Fraser, Wendy J. Crookes-Goodson, John N. Russell, D. Matthew Eby, Glenn R. Johnson, Peter A. Mirau, Jennifer M. Hurtubise, Michelle L. Kay, Daniel E. Barlow, Andrew Blankemeier, Pamela F. Lloyd, Caitlin L. Bojanowski, Pehr E. Pehrsson |
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Rok vydání: | 2013 |
Předmět: |
Biofouling
Surface Properties Polyurethanes Intracellular storage Pseudomonas fluorescens Aquatic Science Biology Cytoplasmic Granules Applied Microbiology and Biotechnology Microbiology chemistry.chemical_compound Nutrient Microscopy Electron Transmission Paint Yeast extract Water Science and Technology Polyurethane Microbial Biofilms Construction Materials Biofilm Spectrometry X-Ray Emission biochemical phenomena metabolism and nutrition Plankton biology.organism_classification Culture Media chemistry Stationary phase Biofilms Microscopy Electron Scanning |
Zdroj: | Biofouling. 29:601-615 |
ISSN: | 1029-2454 0892-7014 |
Popis: | Microbial biofilms cause the deterioration of polymeric coatings such as polyurethanes (PUs). In many cases, microbes have been shown to use the PU as a nutrient source. The interaction between biofilms and nutritive substrata is complex, since both the medium and the substratum can provide nutrients that affect biofilm formation and biodeterioration. Historically, studies of PU biodeterioration have monitored the planktonic cells in the medium surrounding the material, not the biofilm. This study monitored planktonic and biofilm cell counts, and biofilm morphology, in long-term growth experiments conducted with Pseudomonas fluorescens under different nutrient conditions. Nutrients affected planktonic and biofilm cell numbers differently, and neither was representative of the system as a whole. Microscopic examination of the biofilm revealed the presence of intracellular storage granules in biofilms grown in M9 but not yeast extract salts medium. These granules are indicative of nutrient limitation and/or entry into stationary phase, which may impact the biodegradative capability of the biofilm. |
Databáze: | OpenAIRE |
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