title: Phytoremediation of hexachlorocyclohexane (HCH)-contaminated soils using Cytisus striatus and bacterial inoculants in soils with distinct organic matter content.
abstract: 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.
authors.affiliation: Instituto de Investigacións Agrobiolóxicas de Galicia, CSIC, Apdo. 122, Santiago de Compostela 15780, Spain. cbecerra@iiag.csic.es
authors.forename: Cristina
authors.initials: C
authors.lastname: Becerra-Castro
authors.forename: Petra S
authors.initials: PS
authors.lastname: Kidd
authors.forename: Beatriz
authors.initials: B
authors.lastname: Rodríguez-Garrido
authors.forename: Carmela
authors.initials: C
authors.lastname: Monterroso
authors.forename: Paula
authors.initials: P
authors.lastname: Santos-Ucha
authors.forename: Angeles
authors.initials: A
authors.lastname: Prieto-Fernández
mesh_terms: D001419:Bacteria / Q000254:growth & development / Q000378:metabolism; D001673:Biodegradation, Environmental; D029865:Cytisus / Q000502:physiology*; D001556:Hexachlorocyclohexane / Q000032:analysis / Q000378:metabolism*; D012987:Soil / Q000737:chemistry*; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000032:analysis / Q000378:metabolism*
chemical_list: D012987:Soil; D012989:Soil Pollutants; D001556:Hexachlorocyclohexane