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Possible strategy for the survival of marine bacteria under starvation conditions

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Abstract

A population of a psychrophilic marine vibrio (Ant-300) suspended at a low cell density in natural seawater (SW) or artificial seawater (ASW) showed an initial 200-fold increase in cell numbers. Ant-300 suspended in ASW at various densities showed a magnified initial increase in numbers as well as increased longevity as the population density decreased. The magnitude of the initial increase and the viability of the cells after 7 weeks continued incubation were the same whether the cells were suspended in SW, ASW amended with amino acids, or “organic-free” ASW. Continued incubation (long-term starvation) of a culture of Ant-300 at low cell densities in ASW showed that after 70 weeks over 15 times the orginal number of cells were still viable. When compared to the starvation survival of other bacceria, Ant-300 exceeds the longest reported starvation survival by at least 2.5 times. Our data indicate that Ant-300 is especially adapted for survival at low nutrient concentrations and low population densities due to a sustained increase in cell numbers that may represent a species survival mechanism for marine bacteria.

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Communicated by T. Platt, Dartmouth

Technical Paper No. 4493, Oregon Agricultural Experiment Station.

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Novitsky, J.A., Morita, R.Y. Possible strategy for the survival of marine bacteria under starvation conditions. Mar. Biol. 48, 289–295 (1978). https://doi.org/10.1007/BF00397156

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  • DOI: https://doi.org/10.1007/BF00397156

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