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dc.contributor.author이인숙-
dc.contributor.author조경숙-
dc.contributor.author김재수-
dc.date.accessioned2017-08-28T11:06:13Z-
dc.date.available2017-08-28T11:06:13Z-
dc.date.issued2006-
dc.identifier.issn1093-4529-
dc.identifier.otherOAK-3562-
dc.identifier.urihttp://dspace.ewha.ac.kr/handle/2015.oak/234114-
dc.description.abstractTo know microbial activity and diesel-removal efficiency influencing through plant roots, we examined the effect of the rhizosphere on phytoremediation of diesel-contaminated soils by alfalfa (Medicago sativa L.). Pots were treated with and without diesel and allowed to stabilize for 7 weeks, at which time four experimental/control groups were prepared: (1) planted diesel-contaminated soil, (2) unplanted diesel-contaminated soil, (3) planted uncontaminated soil, and (4) unplanted uncontaminated soil. Samples of rhizosphere and bulk soils were separately taken from all planted pots. After 7 weeks of alfalfa growth from seeds, the removal efficiencies in rhizosphere and bulk soil samples were 82.5% and 36.5 59.4%, respectively. The total microbial activity was highest in diesel-contaminated rhizosphere soils. Significantly more culturable soil bacteria and hydrocarbon-degraders were found in diesel-contaminated rhizosphere soil versus unplanted and uncontaminated bulk soil, with a greater increase seen in hydrocarbon-degraders (172-fold) versus general soil bacteria (14-fold). DGGE (Denaturing Gel Gradient Electrophoresis) analysis revealed that the bacterial community structure was most highly influenced by the combined presence of diesel contamination and plant roots (39.13% similarity compared to the control), but that diesel contamination alone had a higher influence (42.31% similarity compared to the control) than the rhizosphere (50.00% similarity compared to the control). Sequence analysis and BLAST searches revealed that all samples were dominated by members of α -, γ -, δ - and ε -proteobacteria, and Chloroflexi. The rhizosphere samples additionally contained novel dominant members of α -proteobacteria and Cytophaga-Flexibacter-Bacteroides, while the diesel samples contained additional dominant α -proteobacteria and the rhizosphere plus diesel samples contained other ε -proteobacteria. Collectively, these findings indicate that the presence of plant roots (i.e., a rhizosphere) had a greater effect on bacterial activity in diesel contamination than did the absence of diesel contamination, whereas diesel contamination had a greater effect on bacterial community structure. These novel findings provide new insight into the mechanisms of phytoremediation. Copyright © Taylor & Francis Group, LLC.-
dc.languageEnglish-
dc.titleRhizosphere microbial activity during phytoremediation of diesel-contaminated soil-
dc.typeArticle-
dc.relation.issue11-
dc.relation.volume41-
dc.relation.indexSCI-
dc.relation.indexSCIE-
dc.relation.indexSCOPUS-
dc.relation.startpage2503-
dc.relation.lastpage2516-
dc.relation.journaltitleJournal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering-
dc.identifier.doi10.1080/10934520600927658-
dc.identifier.wosidWOS:000240750300006-
dc.identifier.scopusid2-s2.0-33749005098-
dc.author.googleKim J.-
dc.author.googleKang S.-H.-
dc.author.googleMin K.-A.-
dc.author.googleCho K.-S.-
dc.author.googleLee I.-S.-
dc.contributor.scopusid이인숙(7404442171;23108969600)-
dc.contributor.scopusid조경숙(7403957095)-
dc.date.modifydate20170922131515-
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자연과학대학 > 생명과학전공 > Journal papers
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