阴离子型调节盐胁迫对盐湖细菌的影响。

IF 2.6 3区 生物学 Q3 BIOCHEMISTRY & MOLECULAR BIOLOGY
Bianka Csitári, Anna Bedics, Tamás Felföldi, Emil Boros, Hajnalka Nagy, István Máthé, Anna J Székely
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引用次数: 4

摘要

除氯化钠外,内陆咸水系统通常还含有除氯化物以外的其他阴离子,如碳酸氢和硫酸盐。我们对盐组成多样性的生物学效应认识有限;因此,本研究的目的是研究不同阴离子对嗜盐菌生长的影响。采用碳酸盐、氯化物或硫酸盐为阴离子,浓度范围为0 ~ 0.40 mol/L的培养基,对172株离子组成不同的盐碱湖和苏打湖分离菌株的盐组成和浓度偏好进行了测试。不同菌株对盐型的偏好差异与它们所分离的自然生境的盐成分有关,表明它们对盐型有特定的适应。碳酸钠表现出最强的选择力,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,尽管在同一种细菌中也发现了差异。我们的研究结果表明,盐湖中溶解盐的影响程度不仅限于其浓度,阴离子的类型也会对单个微生物的生长和生存产生实质性的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Anion-type modulates the effect of salt stress on saline lake bacteria.

Anion-type modulates the effect of salt stress on saline lake bacteria.

Anion-type modulates the effect of salt stress on saline lake bacteria.

Anion-type modulates the effect of salt stress on saline lake bacteria.

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.

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来源期刊
Extremophiles
Extremophiles 生物-生化与分子生物学
CiteScore
6.80
自引率
6.90%
发文量
28
审稿时长
2 months
期刊介绍: Extremophiles features original research articles, reviews, and method papers on the biology, molecular biology, structure, function, and applications of microbial life at high or low temperature, pressure, acidity, alkalinity, salinity, or desiccation; or in the presence of organic solvents, heavy metals, normally toxic substances, or radiation.
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