Earthworm egg capsules as vectors for the environmental introduction of biodegradative bacteria

Article Abstract:

The presence of Ralsonia eutropha within the developing earthworm cocoon can influence the degradation and toxicity of 2,4-dichlorophenoxyacetic acid (2,4-DCP) and 2,4-dichlorophenol, respectively. Research findings indicate that cocoons containing R. eutropha were able to tolerate higher levels of 2,4-DCP. The biodegradation of 2.4-DCP by R. eutropha within the cocoons may be the mechanism contributing to toxicity reduction. These suggest that cocoons can be used as inoculants for the introduction into the environment of beneficial bacteria with biodegradative capabilities.

Usage, Soil microbiology, Agricultural bacteriology, Earthworms, Bacteriology, Agricultural, Earthworm culture, Soil inoculation

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Degradation of monochlorinated and nonchlorinated aromatic compounds under iron-reducing conditions

Article Abstract:

Riverine anaerobic microbes degrade the nonchlorinated and monochlorinated aromatic compounds, phenol and 2-, 3-, and 4-chlorophenol respectively, to an extent larger than what is expected from stoichiometric degradation by using Fe(super 3+) for an electron acceptor. The riverine bacterium Geobacter metallireducens GS-15 is able to degrade benzoate and phenol but unable to degrade chlorophenol or chlorobenzene. This indicates that only certain genera in the riverine bacterial population have this Fe-reducing capability, which are not yet identified.

Physiological aspects, Environmental aspects, Oxidation-reduction reaction, Oxidation-reduction reactions, Iron, Iron (Metal), Anaerobic bacteria, Aromatic compounds, Chlorophenols

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Isolation and characterization of polycyclic aromatic hydrocarbon-degrading bacteria associated with the rhizosphere of salt marsh plants

Article Abstract:

There appears to be a diverse population of bacteria in salt marshes that can degrade polycyclic aromatic hydrocarbons. Researchers found three main groups based on fatty acid profiles and 16S rRNA gene sequences: gram-negative pseudomonads, gram-positive nocardioforms, and Paenibacillus.

Polycyclic aromatic hydrocarbons, Marsh ecology

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