title: Rhizodegradation potential and tolerance of Avicennia marina (Forsk.) Vierh in phenanthrene and pyrene contaminated sediments.
abstract: A pot experiment was conducted to investigate the dissipation of phenanthrene and pyrene in spiked sediments with presence of Avicennia marina (Forsk.) Vierh. The rhizosphere environment was set up using a self-design nylon rhizo-bag which divided the sediment into the rhizosphere and non-rhizosphere. Results showed that the dissipation of phenanthrene and pyrene were significantly enhanced in the rhizosphere compared with non-rhizosphere sediments. Plant roots promoted dissipation significantly greater than the contribution of direct plant uptake and accumulation of phenanthrene and pyrene. The activities of antioxidant and detoxification enzymes in roots and leaves significantly increased against oxidative stress with increasing PAH concentrations. Furthermore, a significant relationship (R(2)>0.91) between dissolved organic carbon (DOC) concentrations and the residual of PAHs in rhizosphere and non-rhizosphere sediments was observed after 120days planting. Results indicated that rhizome mediation with A. marina is a useful approach to promote the depletion of PAHs in contaminated mangrove sediments.
authors.affiliation: Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen 361102, PR China.
authors.forename: Hui
authors.initials: H
authors.lastname: Jia
authors.affiliation: Xuzhou Medical University, Affiliated Hospital, Xuzhou 221009, PR China.
authors.forename: He
authors.initials: H
authors.lastname: Wang
authors.affiliation: Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen 361102, PR China.
authors.forename: Haoliang
authors.initials: H
authors.lastname: Lu
authors.affiliation: Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen 361102, PR China; Biogeochemistry Research Group, Geography Department, Trinity College, University of Dublin, Ireland.
authors.forename: Shan
authors.initials: S
authors.lastname: Jiang
authors.affiliation: Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen 361102, PR China.
authors.forename: Minyue
authors.initials: M
authors.lastname: Dai
authors.affiliation: Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen 361102, PR China.
authors.forename: Jingchun
authors.initials: J
authors.lastname: Liu
authors.affiliation: Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen 361102, PR China. Electronic address: ycl@xmu.edu.cn.
authors.forename: Chongling
authors.initials: C
authors.lastname: Yan
mesh_terms: D032407:Avicennia / Q000378:metabolism*; D002681:China; D019015:Geologic Sediments; D010616:Phenanthrenes / Q000378:metabolism*; D018517:Plant Roots / Q000378:metabolism; D011721:Pyrenes / Q000378:metabolism*; D058441:Rhizosphere; D014874:Water Pollutants, Chemical / Q000378:metabolism*
chemical_list: D010616:Phenanthrenes; D011721:Pyrenes; D014874:Water Pollutants, Chemical
keywords: Avicennia marina (Forsk.) Vierh; Oxidative stress; Phenanthrene; Pyrene; Rhizodegradation