Rhizoremediation of diesel-contaminated soil using the plant growth-promoting rhizobacterium Gordonia sp S2RP-17
- Authors
- Hong, Sun Hwa; Ryu, HeeWook; Kim, Jaisoo; Cho, Kyung-Suk
- Issue Date
- Jun-2011
- Publisher
- SPRINGER
- Keywords
- Rhizoremediation; Plant growth-promoting rhizobacterium; Diesel-contaminated soil; Gordonia sp.; Zea mays
- Citation
- BIODEGRADATION, v.22, no.3, pp.593 - 601
- Journal Title
- BIODEGRADATION
- Volume
- 22
- Number
- 3
- Start Page
- 593
- End Page
- 601
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/13642
- DOI
- 10.1007/s10532-010-9432-2
- ISSN
- 0923-9820
- 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 +/- A 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 +/- A 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 x 10(6) CFU g-soil(-1) during the remediation period, although they slightly decreased from their initial numbers (2.94 x 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.
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