Effect of environmental factors on the trans/cis ratio of unsaturated fatty acids in Pseudomonas putida S12
Article Abstract:
The membrane cells of Pseudomonas putida S12 react to various environmental stress differently, showing varying trans/cis ratios of unsaturated fatty acids. An increase in the ratio of trans to cis characterizes the cell's reaction to the addition of heavy metals. Exposure at 30 degrees C results in optimal growth of cells, while gradual reduction in temperature decreases the saturation rate of fatty acids. Toxic concentrations of sodium chloride or sucrose increases the trans/cis ratio. Exposure to pH between 4.0 and 5.0 shows optimum cis/trans isomerase activity with a loss of viability.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1996
User Contributions:
Comment about this article or add new information about this topic:
Cell envelope changes in solvent-tolerant and solvent-sensitive Pseudomonas putida strains following exposure to o-xylene
Article Abstract:
A study was conducted to investigate the cell envelope dynamics of solvent-tolerant organisms. The phospholipid content, lipopolysaccharide structure and permeability of Pseudomonas putida Idaho and Pseudomonas putida MW1200 after exposure to o-Xylene were compared. Results showed that solvent tolerance occurs in the absence of metabolism of the organic solvent. Trans-unsaturated fatty acids were not found to confer solvent tolerance.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1996
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Influence of two plant species (flax and tomato) on the distribution of nitrogen dissimilative abilities within fluorescent Pseudomonas spp
- Abstracts: Development of PCR primers from internal transcribed spacer region 2 for detection of Phytophthora species infecting potatoes
- Abstracts: An indirect enzyme immunoassay for the mycotoxin citrinin. Mycotoxin production by Fusarium species isolated from bananas
- Abstracts: Impact of growth in benzoate and m-toluate liquid media on culturability of Pseudomonas putida on benzoate and m-toluate plates
- Abstracts: Metabolites of ochratoxins in rat urine and in a culture of Aspergillus ochraceus. Functional analysis of the threonine- and serine-rich Gp-I domain of glucoamylase I from Aspergillus awamori var. kawachi