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2. Whole cell-derived fatty acid profiles of Pseudomonas sp. JS150 during naphthalene degradation

Author

Mrozik, A., Łabuzek, S., and Zofia Piotrowska-Seget

Subjects
naphthalene degradation, fatty acid composition, sense organs, Pseudomonas sp. JS150
Abstract

Changes in cellular fatty acid composition during naphthalene degradation, at the concentrations of 0.5 g lñ1 or 1.0 g lñ1,by Pseudomonas sp. JS150 were investigated. In response to naphthalene exposure an increase in saturated/unsaturatedratio was observed. Additionally, the dynamic changes involved alterations in the contents of hydroxy, cyclopropaneand branched fatty acids. Among the classes of fatty acids tested the most noticeable changes in the abundance ofcyclopropane fatty acids were observed. Since day 4 of incubation these fatty acids were not dectected in bacterial cellsgrowing on naphthalene. In contrast, markedly increased in the percentage of hydroxy fatty acids over time wasobserved. However, the proportions of saturated straight-chain and branched fatty acids did not change such significantly.

Published
2005

7. Changes in whole cell-derived fatty acids induced by naphthalene in bacteria from genus Pseudomonas.

Author

Mrozik A, Piotrowska-Seget Z, and Łabuzek S

Subjects
Biodegradation, Environmental, Biomass, Chromatography, Gas, Cyclopropanes analysis, Cyclopropanes chemistry, Fatty Acids biosynthesis, Fatty Acids chemistry, Fatty Acids, Unsaturated analysis, Fatty Acids, Unsaturated chemistry, Kinetics, Pseudomonas growth & development, Fatty Acids analysis, Naphthalenes metabolism, Pseudomonas chemistry, Pseudomonas metabolism
Abstract

Fatty acid composition during naphthalene utilization was investigated in three strains of bacteria Pseudomonas vesicularis, Pseudomonas stutzeri and Pseudomonas sp. JS150 that expressed different naphthalene degradation abilities. All strains significantly changed their cellular fatty acid profiles as a response to naphthalene exposure. Since naphthalene was present in the medium P. stutzeri increased ratio of saturated/unsaturated fatty acids from 1.1 to 2.1 and Pseudomonas sp. JS150 from 7.5 to 12.0, respectively. In contrast, this ratio decreased from 2.1 to 1.1 in P. vesicularis under the same growth conditions. The changes comprised also alterations in the percentage of selected groups of fatty acids: iso and anteiso, hydroxy and cyclopropane fatty acids. Our results showed that naphthalene induced in tested strains different changes in fatty acids composition. It may suggest that in the presence of naphthalene microorganisms used different adaptive mechanisms to maintain the cells in appropriate physiological state.

Published
2004
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