Journal
ENVIRONMENTAL POLLUTION
Volume 178, Issue -, Pages 202-210Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2013.03.027
Keywords
Persistent organic pollutants (POP); Rhizoremediation; Plant-associated bacteria; Organic contaminant; Hydrophobic contaminant
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Funding
- Xunta de Galicia [INCI-TE08PXIB200136PR]
- FEDER(EC)
- Ministerio de Ciencia e Innovacion [CTM2009-14576-CO2-01, CTM2009-14576-CO2-02]
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The performance of Cytisus striatus in association with different microbial inoculant treatments on the dissipation of the insecticide hexachlorocyclohexane (HCH) was studied. Two soils with different organic matter (A and B soil) content were spiked with 0 or 65 mg HCH kg(-1). Plants were either not inoculated (NI), or inoculated with the endophyte Rhodococcus erythropolis ET54b and the HCH-degrader Sphingomonas sp. D4 separately or in combination (ET, D4 and ETD4). Unplanted pots were also established. HCH phytotoxicity was more pronounced in the B soil. Soil HCH concentrations in unplanted pots were similar to initial concentrations, whereas concentrations were reduced after plant growth: by 20% and 8% in A and B soil, respectively. Microbial inoculants also modified HCH dissipation, although effects were soil-dependent. Inoculation with the combination of strains (ETD4) led to a significant enhancement in HCH dissipation: up to 53% in the A soil and 43% in the B soil. (C) 2013 Elsevier Ltd. All rights reserved.
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