Rhizosphere effect of Scirpus triqueter on soil microbial structure during phytoremediation of diesel-contaminated wetland

Though phytoremediation has been widely used to restore various contaminated sites, it is still unclear how soil microbial communities respond microecologically to plants and pollutants during the process. In this paper, batch microcosms imitating in situ phytoremediation of petroleum-contaminated w...

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Bibliographic Details
Published in:Environmental technology 2014-02, Vol.35 (4), p.514-520
Main Authors: Wei, Jing, Liu, Xiaoyan, Zhang, Xinying, Chen, Xueping, Liu, Shanshan, Chen, Lisha
Format: Article
Language:English
Subjects:
Applied sciences
Bacteria
Biodegradation, Environmental
Continental surface waters
Cyperaceae - metabolism
Cyperaceae - microbiology
Diesel
diesel contamination
Diesel fuels
environmental technology
Exact sciences and technology
fatty acid composition
Fatty acids
fungi
Gasoline - analysis
Gasoline - microbiology
Gram-negative bacteria
Microbial Consortia - physiology
Microorganisms
Natural water pollution
palmitic acid
phospholipid fatty acid
phospholipid fatty acids
Phytoremediation
pollutants
Pollution
polyunsaturated fatty acids
population
principal component analysis
Rhizosphere
rhizosphere effect
root exudates
Scirpus
soil
Soil (material)
soil microbial community
Soil Microbiology
soil microorganisms
Soil Pollutants
Water treatment and pollution
Wetlands
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Summary:Though phytoremediation has been widely used to restore various contaminated sites, it is still unclear how soil microbial communities respond microecologically to plants and pollutants during the process. In this paper, batch microcosms imitating in situ phytoremediation of petroleum-contaminated wetland by Scirpus triqueter were set up to monitor the influence of plant rhizosphere effect on soil microbes. Palmitic acid, one of the main root exudates of S. triqueter , was added to strengthen rhizosphere effect. Abundances of certain microbial subgroups were quantified by phospholipid fatty acid profiles. Results showed that diesel removal extents were significantly higher in the rhizosphere (57.6±4.2–65.5±6.9%) than those in bulk soil (27.8±6.5–36.3±3.2%). In addition, abundances of saturated, monounsaturated, and polyunsaturated fatty acids were significantly higher (P
ISSN:1479-487X
0959-3330
1479-487X
DOI:10.1080/09593330.2013.836549