Abstract
Phospholipid FA (PLFA) profiles were determined on four piezophilic bacteria from the deep sea: Moritella japonica DSK1, Shewanella violacea DSS12, S. benthica DB6705, and S. benthica DB21MT-2. The total concentrations of PLFA were higher in strains grown at low pressure (DSK1, 10 MPa, 27.0 mg/g dry wt cells; DSS12, 50 MPa, 24.0 mg/g), and lower in strains grown at high pressure (DB6705, 85 MPa, 1.9 mg/g; DB21MT-2, 100 MPa, 3.0 mg/g). The piezophilic bacteria were characterized by a high abundance of unsaturated FA (62–73% of total FA). In particular, PUFA were detected in all piezophiles examined. Moritella japonica DSK 1 produced 22∶6n−3 (DHA), whereas the three Shewanella strains produced 20∶5n−3 (EPA) with trace amounts of DHA. The detection of low levels of the medium-chain-length PUFA 18∶2n−6 and 18∶3 (DSK1) and 20∶2 (DB6705 and DB21MT-2) suggests that the biosynthesis of EPA and DHA may be regulated by the formation and desaturation of di-and tri-unsaturated FA.
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Abbreviations
- PLFA:
-
phospholipid FA
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Fang, J., Chan, O., Kato, C. et al. Phospholipid FA of piezophilic bacteria from the deep sea. Lipids 38, 885–887 (2003). https://doi.org/10.1007/s11745-003-1140-7
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DOI: https://doi.org/10.1007/s11745-003-1140-7