Changes in soil microbial community composition induced by cometabolism of toluene and trichloroethylene

Hubert, Claude; Shen, Yin; Voordouw, Gerrit

doi:10.1007/s10531-003-0471-4

Cited by 12 publications

(2 citation statements)

References 53 publications

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“…In turn, co-metabolism may be associated with a shift in the composition of the microbial consortium (Hubert et al 2005). Root-exuded compounds may also selectively support specific microbial strains relative to others.…”

Section: Rhizosphere Controls Of Biodegradation Of Organic Compoundsmentioning

confidence: 99%

Rhizosphere processes and management in plant-assisted bioremediation (phytoremediation) of soils

2008

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Plant-assisted bioremediation or phytoremediation holds promise for in situ treatment of polluted soils. Enhancement of phytoremediation processes requires a sound understanding of the complex interactions in the rhizosphere. Evaluation of the current literature suggests that pollutant bioavailability in the rhizosphere of phytoremediation crops is decisive for designing phytoremediation technologies with improved, predictable remedial success. For phytoextraction, emphasis should be put on improved characterisation of the bioavailable metal pools and the kinetics of resupply from less available fractions to support decision making on the applicability of this technology to a given site. Limited pollutant bioavailability may be overcome by the design of plantmicrobial consortia that are capable of mobilising metals/metalloids by modification of rhizosphere pH (e.g. by using Alnus sp. as co-cropping component) and ligand exudation, or enhancing bioavailability of organic pollutants by the release of biosurfactants. Apart from limited pollutant bioavailability, the lack of competitiveness of inoculated microbial strains (in particular degraders) in field conditions appears to be another major obstacle. Selecting/engineering of plant-microbial pairs where the competitiveness of the microbial partner is enhanced through a "nutritional bias" caused by exudates exclusively or primarily available to this partner (as known from the "opine concept") may open new horizons for rhizodegradation of organically polluted soils. The complexity and heterogeneity of multiply polluted "real world" soils will require the design of integrated approaches of rhizosphere management, e.g. by combining co-cropping of phytoextraction and rhizodegradation crops, inoculation of microorganisms and soil management. An improved understanding of the rhizosphere will help to translate the results of simplified bench scale and pot experiments to the full complexity and heterogeneity of field applications.

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Section: Rhizosphere Controls Of Biodegradation Of Organic Compoundsmentioning

confidence: 99%

Rhizosphere processes and management in plant-assisted bioremediation (phytoremediation) of soils

2008

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“…Heavy metals and toxic organic pollution provided a selection pressure on the microbial community, which might increase the number of tolerant microorganisms (Diaz-Ravina, 1996). Compared with Gram-positive bacteria, Gram-negative bacteria had more lipopolysaccharides in cell wall and induced pump systems, showing a greater advantage in the pollution resistance (Fernandes et al, 2003;Hubert et al, 2005). All of the Proteobacteria were Gram-negative, and they were the largest bacteria in the environment.…”

Section: Discussionmentioning

confidence: 99%

Distribution of microbial communities in Guiyu soils and sediments investigated by 16S rRNA gene library and denaturing gradient gel electrophoresis (DGGE) fingerprinting

Chen¹,

Bokun²,

Lun³

et al. 2013

Afr. J. Microbiol. Res.

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Guiyu, a town in south China, seriously polluted by heavy metals and toxic organic compounds, takes an important part in the cycle of the Waste Electrical and Electronic Equipment. Here, cultureindependent approaches were used to analyze the bacterial community structure of 7 soil and sediment samples. The objective of this paper was to examine the distribution of microbial communities in the ewaste contaminated areas of Guiyu. High concentrations of metals (Cu, Pb, Zn and Al) were detected in the soil and sediment samples collected from the e-waste contaminated areas at Guiyu. Denaturing gradient gel electrophoresis (DGGE) and 16S rRNA gene library technology were used to investigate the microbial communities. The 16S rRNA gene library could detect more bacteria than polymerase chain reaction (PCR)-DGGE. The main bacteria in the soil and sediment samples were Deltaproteobacteria (36%), Firmicutes (16%), Alphaproteobacteria (9%), Bacteroidetes (7%), Verrucomicrobia (7%) and Acidobacteria (5%); and 20% of the sequences in the 16S rRNA gene library had sequence identities less than 92% with known sequences.

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Assessment of the Consequences of Xenobiotics in Soil Ecosystem

Bharadwaj,

Rastogi,

Pandey

et al. 2023

Xenobiotics in Urban Ecosystems

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Changes in soil microbial community composition induced by cometabolism of toluene and trichloroethylene

Cited by 12 publications

References 53 publications

Rhizosphere processes and management in plant-assisted bioremediation (phytoremediation) of soils

Rhizosphere processes and management in plant-assisted bioremediation (phytoremediation) of soils

Distribution of microbial communities in Guiyu soils and sediments investigated by 16S rRNA gene library and denaturing gradient gel electrophoresis (DGGE) fingerprinting

Assessment of the Consequences of Xenobiotics in Soil Ecosystem

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