Paraffinic hydrocarbons in the sulfate-reducing bacterium Desulfovibrio desulfuricans
Paraffinic hydrocarbons in the sulfate-reducing bacterium Desulfovibrio desulfuricans
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DOI：
10.1016/0009-2541(68)90007-7
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发表时间：
1968-06
期刊：
影响因子：
3.9
通讯作者：
J. Davis
中科院分区：
文献类型：
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作者：
J. Davis
从厌氧硫酸盐还原菌脱硫弧菌中提取的脂质占细胞重量的5-9%。约25%的脂质由饱和烃组成。饱和烃馏分中的一系列主要正链烷烃（C25-C35）对奇数或偶数碳链没有特别的偏好。细胞脂质的脂肪酸具有较短的链长，并且包括棕榈酸（C16）、硬脂酸（C18）和油酸（C18），常见的脂肪组分。因此，脂肪酸和石蜡之间没有明显的亲源-产物关系，在沉积环境中，细菌合成烃类和其它产物可能具有特别重要的意义。作为食物链的最后一环，细菌最终成为唯一具有生物合成能力的有机体，因此，只要生物圈条件存在，就有望影响有机物的改变。从理论上讲，随着沉积物深度的增加，这种影响预计会增加，因为先前的植物和动物合成模式逐渐被细菌合成所取代或叠加。
Lipid extracted from the anaerobic, sulfate-reducing bacterium,Desulfovibrio desulfuricans, constitutes 5–9% of the cellular weight. About 25% of the lipid consists of saturated hydrocarbons. A prominent series of normal paraffins (C25–C35) in the saturated hydrocarbon fraction show no particular preference for odd- or even-numbered carbon chains. Fatty acids of the cellular lipid are of shorter chain length and include palmitic (C16), stearic (C18) and oleic (C18), common fat components. There is thus no obvious precursor-product relationship between the fatty acids and the paraffins.In the sedimentary environment bacterial synthesis of hydrocarbons and other products may be of particular significance. Being last in the food chain, bacteria ultimately become the only organisms with biosynthetic capability and thus would be expected to effect organic matter modification as long as biospheric conditions exist. Theoretically, the effect is expected to increase with depth of sediments as the pattern of prior plant and animal synthesis is gradually displaced or superimposed by bacterial synthesis.