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Kelthane degradation by genetically engineered Pseudomonas aeruginosa BS827 in a soil ecosystem
L A Golovleva1, R N Pertsova, A M Boronin
1Institute of Biochemistry and Physiology of Microorganisms, USSR Academy of Sciences, Moscow Region.
Applied and Environmental Microbiology
|June 1, 1988
Summary
Pseudomonas aeruginosa BS827 degrades kelthane using genes on the pBS3 plasmid, which also stabilizes the plasmid within the cell population. This demonstrates a link between kelthane degradation and plasmid stability.
Area of Science:
- Microbiology
- Environmental Science
- Biotechnology
Background:
- Pesticides like kelthane pose environmental risks.
- Microbial degradation is a key strategy for bioremediation.
- Pseudomonas aeruginosa is known for its metabolic versatility.
Purpose of the Study:
- To investigate the microbial degradation of kelthane by Pseudomonas aeruginosa BS827.
- To determine the role of the pBS3 plasmid in kelthane degradation and bacterial survival.
- To understand the genetic basis of kelthane biodegradation.
Main Methods:
- Culturing Pseudomonas aeruginosa BS827 with kelthane.
- Plasmid analysis to confirm presence and stability.
- Assessing bacterial survival and kelthane degradation efficiency.
- Genetic analysis of Nah and Sal characters.
Main Results:
- Pseudomonas aeruginosa BS827 survived and degraded kelthane.
- The pBS3 plasmid, encoding naphthalene oxidation, was crucial for degradation.
- Kelthane stabilized the pBS3 plasmid, with 70-100% retention.
- Cells lacking specific genetic characters (Nah/Sal) showed reduced degradation; plasmid-free cells lost the ability.
Conclusions:
- Plasmid pBS3 and its associated genes are essential for Pseudomonas aeruginosa BS827's kelthane degradation.
- Kelthane exposure enhances the stability of the biodegradative plasmid.
- This highlights a potential mechanism for enhanced bioremediation strategies.