Effects of copper and cadmium ions on the physicochemical properties of lipids of the marine bacterium Pseudomonas putida IB28 at different growth temperatures
| Autor: | G. N. Likhatskaya, I. P. Bezverbnaya, N. M. Sanina, O. B. Popova |
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| Rok vydání: | 2008 |
| Předmět: |
Cadmium
biology Metal ions in aqueous solution Phospholipid chemistry.chemical_element Aquatic Science Bacterial growth Oceanography biology.organism_classification Pseudomonas putida chemistry.chemical_compound chemistry Biochemistry Saturated fatty acid lipids (amino acids peptides and proteins) Cyclopropane fatty acid Lipid bilayer Nuclear chemistry |
| Zdroj: | Russian Journal of Marine Biology. 34:179-185 |
| ISSN: | 1608-3377 1063-0740 |
| DOI: | 10.1134/s1063074008030073 |
| Popis: | The phospholipid and fatty acid composition and thermotropic behavior of total lipids were studied in the metal-accumulating marine strain Pseudomonas putida IB28 grown in the presence of Cu2+ and Cd2+ at 4 and 24°C. Despite the changes in acidic lipid content, unsaturated/saturated fatty acid ratio, and cyclopropane fatty acid level, the temperature range of calorimetric phase transitions of bacterial total lipids was slightly altered under these factors. The suppressive action of heavy metals on bacterial growth is attributable to the phase separation of lipids and, as a consequence, to a sharp increase in the ion permeability of the lipid bilayer. The increase in acidic phospholipid level under the influence of Cu2+ and Cd2+, especially at 24°C, is likely to be indicative of their complexation with heavy metal ions. |
| Databáze: | OpenAIRE |
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