|
| Status |
Public on Aug 07, 2009 |
| Title |
Microarray analysis of high Arctic soil bacterial response to hydrocarbon pollution and bioremediation: genomic DNA |
| Platform organisms |
Bacteria; Archaea |
| Sample organisms |
Bacteria; Escherichia coli; Archaea |
| Experiment type |
Other
|
| Summary |
High Arctic soils have low nutrient availability, low moisture content and very low temperatures and, as such, they pose a particular problem in terms of hydrocarbon bioremediation. An in-depth knowledge of the microbiology involved in this process is likely to be crucial to understand and optimize the factors most influencing bioremediation. Here, we compared two distinct large-scale field bioremediation experiments, located at Alert (ex situ approach) and Eureka (in situ approach), in the Canadian high Arctic. Bacterial community structure and function were assessed using microarrays targeting the 16S rRNA genes of bacteria found in cold environments and hydrocarbon degradation genes as well as reverse-transcriptase real-time PCR targeting key functional genes. Results indicated a large difference between sampling sites in terms of both soil microbiology and decontamination rates. A rapid reorganization of the bacterial community structure and functional potential as well as rapid increases in the expression of alkane monooxygenases and polyaromatic hydrocarbon ring-hydroxylating-dioxygenases were observed one month after the bioremediation treatment commenced in the Alert soils. In contrast, no clear changes in community structure were observed in Eureka soils, while key gene expression increased after a relatively long lag period (1 year). Such discrepancies are likely caused by differences in bioremediation treatments (i.e. ex situ vs. in situ), weathering of the hydrocarbons, indigenous microbial communities, and environmental factors such as soil humidity and temperature. In addition, this study demonstrates the value of molecular tools for the monitoring of polar bacteria and their associated functions during bioremediation.
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| |
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| Overall design |
38 soil samples from two high arctic locations that were contaminated-treated, contaminated or not contaminated followed for up to 4 years
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| Contributor(s) |
Yergeau E, Arbour M, Brousseau R, Juck D, Lawrence JR, Masson L, Whyte LG, Greer CW |
| Citation(s) |
19684169 |
| |
| Submission date |
Aug 05, 2009 |
| Last update date |
Mar 21, 2012 |
| Contact name |
Etienne Yergeau |
| E-mail(s) |
Etienne.Yergeau@cnrc-nrc.gc.ca
|
| Organization name |
NRC-BRI
|
| Department |
Environmental Microbiology
|
| Street address |
6100 Royalmount Ave
|
| City |
Montreal |
| State/province |
Qc |
| ZIP/Postal code |
H4P 2R2 |
| Country |
Canada |
| |
|
| Platforms (1) |
| GPL8960 |
NRC-BRI_Hydrocarbon degrading genes v6.1_141 |
|
| Samples (38)
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| This SubSeries is part of SuperSeries: |
| GSE17533 |
Microarray analyses of high Arctic soil bacterial response to hydrocarbon pollution and bioremediation |
|
| Relations |
| BioProject |
PRJNA123339 |
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