Department of Microbiology, ELTE Eötvös Loránd University, Pázmány Péter stny. 1/c, 1117, Budapest, Hungary.
Department of Ecology and Genetics/Limnology, Uppsala University EBC, Norbyvägen 18D, 75236, Uppsala, Sweden.
Extremophiles. 2022 Feb 9;26(1):12. doi: 10.1007/s00792-022-01260-5.
Beside sodium chloride, inland saline aquatic systems often contain other anions than chloride such as hydrogen carbonate and sulfate. Our understanding of the biological effects of salt composition diversity is limited; therefore, the aim of this study was to examine the effect of different anions on the growth of halophilic bacteria. Accordingly, the salt composition and concentration preference of 172 strains isolated from saline and soda lakes that differed in ionic composition was tested using media containing either carbonate, chloride or sulfate as anion in concentration values ranging from 0 to 0.40 mol/L. Differences in salt-type preference among bacterial strains were observed in relationship to the salt composition of the natural habitat they were isolated from indicating specific salt-type adaptation. Sodium carbonate represented the strongest selective force, while majority of strains was well-adapted to growth even at high concentrations of sodium sulfate. Salt preference was to some extent associated with taxonomy, although variations even within the same bacterial species were also identified. Our results suggest that the extent of the effect of dissolved salts in saline lakes is not limited to their concentration but the type of anion also substantially impacts the growth and survival of individual microorganisms.
除了氯化钠，内陆咸水水生系统通常还含有其他阴离子，如碳酸氢盐和硫酸盐。我们对盐组成多样性的生物效应的理解是有限的；因此，本研究的目的是研究不同阴离子对嗜盐细菌生长的影响。为此，使用含有碳酸盐、氯或硫酸盐作为阴离子的培养基，测试了从盐度和苏打湖分离的 172 株菌的盐组成和浓度偏好，这些盐的浓度值范围为 0 至 0.40 mol/L。观察到细菌菌株之间的盐型偏好差异与它们从天然栖息地的盐组成有关，表明特定的盐型适应性。碳酸钠代表最强的选择力，而大多数菌株即使在高浓度的硫酸钠下也能很好地适应生长。盐偏好在某种程度上与分类学有关，尽管即使在同一细菌种内也存在变异。我们的结果表明，溶解盐在咸水湖中产生的影响程度不仅限于其浓度，阴离子的类型也会极大地影响单个微生物的生长和存活。
