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首页> 外文期刊>Ukrainian Biochemical Journal >Fatty acid composition of sulfate-reducing bacteria isolated from technogenic ecotopes
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Fatty acid composition of sulfate-reducing bacteria isolated from technogenic ecotopes

机译：从技术生物发电机分离的硫酸盐还原细菌的脂肪酸组成

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The growth of technogenic (man-caused) load on the environment leads to the disturbance of natural ecotopes and is a stress factor for the widespread sulfate-reducing bacteria (SRB). Changes of SRB fatty acid composition are considered to be not only one of the mechanisms of adaptation and protection from negative stress but also one of the chemotaxonomic features that can be used as the indicator of bacteria genus and its presence in natural ecotopes. The aim of the work was to determine the fatty acid composition of sulfate-reducing bacteria strains isolated from different technogenic ecotopes. The spectrum of 17 fatty acids was determined by gas chromatography-mass spectrometry. The predominance of saturated C14:0, C15:0, C16:0 and C18:0 and the presence of unsaturated C16:1 and C18:1 fatty acids in SRB lipids were demonstrated. Correlation analysis showed that SRB isolated from the same technogenic locations were characterized by substantial similarity of fatty acid profiles despite belonging to different genera. Thus, fatty acid compositions of SRB strains Desulfovibrio sp. K1 and K2 isolated from soils near gas main-pipeline had correlation index r =?0.94 and that Desulfovibrio sp. TC2, Desulfotomaculum sp. TC3 and Desulfomicrobi um sp. TC4 isolated from city heat system ecotope had correlation index r = 0.97-0.99. The obtained data on increased saturation degree of SRB fatty acids and decreased membrane fluidity indexes could be used for assessing the degree of SRB adaptation to the influence of man-caused loading as a stress factor.
机译：环境上的介绍（人造）负荷的增长导致自然生态的干扰，是普遍硫酸盐还原细菌（SRB）的应力因素。 SRB脂肪酸组成的变化被认为不仅是对负应力的适应和保护机制之一，而且是可以用作细菌属的指标及其在天然生态的存在的趋化性特征之一。该作品的目的是确定从不同型技术生物发电机分离的硫酸盐还原细菌菌株的脂肪酸组成。通过气相色谱 - 质谱法测定17个脂肪酸的光谱。饱和C14：0，C15：0，C16：0和C18：0的优势和不饱和C16：1和C18：1在SRB脂质中的脂肪酸的存在。相关性分析表明，尽管属于不同的属，但是脂肪酸谱的显着相似性的特征在于脂肪酸曲线的大量相似性。因此，SRB菌株的脂肪酸组成脱硫脱硫Sp。从气体管道附近的土壤中分离的K1和K2具有相关指数r =？0.94和该脱硫纤维。 TC2，Desulfotomaculum sp。 TC3和Desulficicrobi UM SP。从城市加热系统隔离的TC4生态胶片具有相关指数r = 0.97-0.99。所获得的关于SRB脂肪酸的饱和度和膜流动指标降低的数据可用于评估SRB适应程度，以对人造的负载作为应力因子的影响。

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