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Effect of Sodium Chloride on the Metabolic Activity of Halophilic Bacteria Isolated from the Lake Gardno Estuary

Zbigniew Mudryk and Wojciech Donderski
Estuaries
Vol. 14, No. 4 (Dec., 1991), pp. 495-498
Stable URL: http://www.jstor.org/stable/1352273
Page Count: 4
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Effect of Sodium Chloride on the Metabolic Activity of Halophilic Bacteria Isolated from the Lake Gardno Estuary
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Abstract

The effect of different concentrations of sodium chloride on the metabolic activity of halophilic bacteria derived from the Lake Gardno estuary was studied using respirometric methods. The influence of salt was examined in two ways: the bacteria were preincubated in various concentrations of sodium chloride, and the cells used for respirometric measurements were supplied with substrates dissolved in water amended with various concentrations of the salt. Generally, an increase in the concentration of sodium chloride in the medium used for preincubation resulted in an increase in metabolic activity. Conversely, a decrease was noted when solutions of increasing salt content were employed to dissolve the substrate. The decrease in oxygen uptake noted when increased amounts of salt were added is proposed to be the result of the short period allowed for adaptation of cells to the higher salt concentrations.

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