The Journal of General Physiology · 1931 · 45 citations · 1 references
Life SciencesEcologyMicrobiologyAquatic MicrobiologyMarine EcologyMicrobial EcologySalinity GradientsSalinity PhysiologySalinity Stress PhysiologyMicrobial Adaptation To SalinityMicrobial Adaptations To High SalinitySalinity Effects On Planktonic MicrobesSalinity Effects On ReproductionSalinity Stress ResponsesSalt Concentration EffectsSalt Tolerance Of Bacteria
1. Dunaliella viridis Teodoresco thrives equally well in solutions of NaCl 1 to 4 mol and pH 6 to 9. 2. The organism is sensitive to calcium and magnesium, especially in acid medium. 3. Calcium and magnesium are antagonistic. In a molar solution of NaCl the antagonistic relation Mg:Ca is 4 to 5. In a 4 molar solution of NaCl the proportion becomes many times as great (20:1). 4. Although the strains used in this investigation did not occur in sea water concentrates, the increase in the antagonistic ratio Mg:Ca in which they can live closely paralleled the changes in this ratio which take place when sea water evaporates. 5. The other organisms which occurred in the cultures each show a specific relation to Ca and Mg. 6. The size of the cells of Dunaliella does not decrease with increasing NaCl content.
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