Culturability and Survival of Marine, Freshwater and Clinical Pseudomonas aeruginosa
スポンサーリンク
概要
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Genetic typing of Pseudomonas aeruginosa isolated from the open ocean has revealed that marine strains form unique clusters. To clarify whether this genetic variation reflects differences in pattern of culturability and survival, a marine strain was compared with a freshwater strain and a clinical strain in microcosms with different levels of NaCl (0 to 7% [w/v]), pH (4.0 to 9.0) and temperature (−20, 0, 4, 25 and 37°C) in both artificial seawater (ASW) and distilled water (DW). The viable but non-culturable (VBNC) state of P. aeruginosa was also monitored. The marine strain 1200 grew better at high NaCl and pH, whereas the freshwater strain 1030 did better at 0 to 3% NaCl and a pH of less than 7.0. The clinical strain 1564 grew best at neutral pH and 0% NaCl. No significant differences were observed among the strains in culturability at different temperatures. Like other bacteria, P. aeruginosa enters a VBNC state under stressful conditions. The marine P. aeruginosa isolate exhibits a unique pattern of culturability and survival which demonstrates a physiological adaptation to the ocean environment.
著者
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Kogure Kazuhiro
Marine Microbiology Lab. Marine Ecosystem Dynamics Ocean Res. Inst. The Univ. Of Tokyo
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Ahsan Mahbuba
Marine Microbiology Laboratory Marine Ecosystem Dynamics Ocean Research Institute The University Of
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Taylor William
Department Of Biology Faculty Of Science University Of Waterloo
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KHAN NURUL
Marine Microbiology Laboratory, Marine Ecosystem Dynamics, Ocean Research Institute, The University
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Khan Nurul
Marine Microbiology Laboratory Marine Ecosystem Dynamics Ocean Research Institute The University Of
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Kogure Kazuhiro
Marine Microbiology Division Ocean Research Institute University Of Tokyo
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Khan Nurul
Marine Microbiology Laboratory, Marine Ecosystem Dynamics, Ocean Research Institute, The University of Tokyo
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