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09:49
Prospecting Microbial Strains for Bioremediation and Probiotics Development for Metaorganism Research and Preservation
Published on: October 31, 2019
Tactic responses to pollutants and their potential to increase biodegradation efficiency
J Lacal1, J A Reyes-Darias, C García-Fontana
1Department of Environmental Protection, Estación Experimental del Zaidín, Consejo Superior de Investigaciones Científicas, Granada, Spain.
Journal of Applied Microbiology
|November 21, 2012
Summary
Bacteria can degrade toxic aromatic hydrocarbons, evolving behaviors like chemoattraction to enhance this process. Pseudomonas putida DOT-T1E exhibits hyperchemotaxis, a strong attraction to pollutants, aiding in their biodegradation.
Area of Science:
- Microbiology
- Environmental Science
- Biochemistry
Background:
- Bacterial strains metabolize toxic aromatic hydrocarbons for energy.
- Degradation pathways often co-evolve with chemotactic behaviors towards or away from pollutants.
- Chemoattraction enhances the bioavailability and biodegradation of aromatic pollutants.
Purpose of the Study:
- To review the role of chemotaxis in aromatic hydrocarbon biodegradation.
- To highlight the phenomenon of hyperchemotaxis in Pseudomonas putida DOT-T1E.
- To discuss the diversity of chemoreceptors for aromatic pollutants.
Main Methods:
- Literature review of bacterial chemotaxis and aromatic hydrocarbon degradation.
- Description of Pseudomonas putida DOT-T1E and its McpT chemoreceptor.
- Comparative analysis of chemoreceptor families.
Main Results:
- Chemoattraction significantly increases the efficiency of aromatic pollutant biodegradation.
- Pseudomonas putida DOT-T1E displays extreme chemoattraction (hyperchemotaxis) mediated by McpT.
- At least two distinct families of chemoreceptors for aromatic hydrocarbons may exist, based on McpT and NahY.
Conclusions:
- Chemotaxis is a crucial adaptation for bacteria utilizing aromatic hydrocarbons.
- The McpT receptor enables potent attraction to pollutants like crude oil.
- Understanding diverse chemoreceptors can inform biosensing applications for pollutant detection.
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