title: Rhizoremediation of diesel-contaminated soil using the plant growth-promoting rhizobacterium Gordonia sp. S2RP-17.
abstract: A plant growth-promoting rhizobacterium (PGPR) was isolated and identified as Gordonia sp. S2RP-17, which showed ACC deaminase and siderophore synthesizing activities. Its maximum specific growth rate was 0.54 ± 0.12 d(-1) at 5,000 mg L(-1) of total petroleum hydrocarbon (TPH), and its maximum diesel degradation rate was 2,434.0 ± 124.4 mg L(-1) d(-1) at 20,000 mg L(-1) of TPH. The growth of Zea mays was significantly promoted by the inoculation of Gordonia sp. S2RP-17 in the diesel-contaminated soil. Measured TPH removal efficiencies by various means were 13% by natural attenuation, 84.5% by planting Zea mays, and 95.8% by the combination of Zea mays and Gordonia sp. S2RP-17. The S2RP-17 cell counts were maintained at 1 × 10(6) CFU g-soil(-1) during the remediation period, although they slightly decreased from their initial numbers (2.94 × 10(7) CFU g-soil(-1)). These results indicate that rhizoremediation using both Zea mays and Gordonia sp. S2RP-17 is a promising strategy for enhancing remediation efficiency of diesel-contaminated soils.
authors.affiliation: Department of Environmental Science and Engineering, Ewha Womans University, Seoul, Korea.
authors.forename: Sun Hwa
authors.initials: SH
authors.lastname: Hong
authors.forename: HeeWook
authors.initials: H
authors.lastname: Ryu
authors.forename: Jaisoo
authors.initials: J
authors.lastname: Kim
authors.forename: Kyung-Suk
authors.initials: KS
authors.lastname: Cho
mesh_terms: D001673:Biodegradation, Environmental; D005742:Gasoline / Q000032:analysis*; D033601:Gordonia Bacterium / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism*; D018517:Plant Roots / Q000382:microbiology; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000378:metabolism*; D003313:Zea mays / Q000254:growth & development* / Q000382:microbiology*
chemical_list: D005742:Gasoline; D012989:Soil Pollutants