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      Rizoremediação de pentaclorofenol em um solo argiloso por sphingomonas chlorophenolica ATCC 39723 Translated title: Pentachlorophenol rhizoremediation in a loamy soil by sphingomonas chlorophenolica ATCC 39723

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          Abstract

          O principal objetivo deste trabalho foi estudar a degradação de PCP por Sphingomonas chlorophenolicaem solo argiloso na presença e ausência de trigo. As concentrações de PCP foram determinadas através de Análises de Alta Performance de Cromatografia Líquida. Os efeitos tóxicos de PCP foram estudados através do monitoramento do crescimento das plantas. A biodegradação de PCP por S. chlorophenolica foi acompanhada por testes de bioluminescência de Escherichia coli HB101 pUCD607 e contagens bacterianas no solo e nas raízes. A degradação de PCP ocorreu de forma mais rápida no solo plantado e inoculado quando comparada ao solo sem plantas. Houve um aumento significativo nas populações dos organismos testados nas raízes quando comparadas com as populações presentes no solo. O monitoramento do crescimento da planta mostrou o papel protetor exercido pela S.chlorophenolica contra a toxicidade do PCP.

          Translated abstract

          The main objective of this study was study the PCP degradation by Sphingomonas chlorophenolica in a loamy soil in the presence and absence of plants (Winter wheat). Measurements of PCP concentrations were carried out in a laboratory basis using High performance liquid chromatography analysis (HPLC). The toxic effect of PCP on plants was studied through the monitoring of the plant growth. The biodegradation of PCP by S. chlorophenolica in soil was assessed with a bioluminescence assay of Escherichia coli HB101 pUCD607 and bacterial analyses in roots and soil. The planted and inoculated soil showed a faster degradation when compared to the inoculated soil without plants. There was a significative increase in the populations of the organisms tested in the roots when compared to the soil. The monitoring of the plant growth showed a protective role of S. chlorophenolica against the toxicity of PCP in the loamy soil.

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          Most cited references42

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          Substrate flow in the rhizosphere

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            Selective influence of plant species on microbial diversity in the rhizosphere

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              Effects of ryegrass on biodegradation of hydrocarbons in soil.

              The effects of growing ryegrass (Lolium perenne L.) on the biodegradation of hydrocarbons was studied in laboratory scale soil columns. Degradation of hydrocarbons as well as bacterial numbers, soil respiration rates and soil dehydrogenase activities were determined. In the rhizosphere soil system, aliphatic hydrocarbons disappeared faster than in unvegetated columns. Abiotic loss by evaporation was of minor significance. Elimination of pollutants was accompanied by an increase in microbial numbers and activities. The microbial plate counts and soil respiration rates were substantially higher in the rhizosphere than in the bulk soil. The results indicate that biodegradation of hydrocarbons in the rhizosphere is stimulated by plant roots.
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                Author and article information

                Journal
                esa
                Engenharia Sanitaria e Ambiental
                Eng. Sanit. Ambient.
                Associação Brasileira de Engenharia Sanitária e Ambiental - ABES (Rio de Janeiro, RJ, Brazil )
                1413-4152
                1809-4457
                December 2007
                : 12
                : 4
                : 426-432
                Affiliations
                [01] orgnameUniversidade Federal de Santa Catarina
                [02] orgnameUniversidade de Aberdeen Reino Unido
                [03] orgnameUniversidade do Vale do Itajaí- SC
                Article
                S1413-41522007000400009 S1413-4152(07)01200409
                7ef5c73b-9305-4546-ad0f-d0e8582f6b21

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 29 October 2007
                : 15 February 2006
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 43, Pages: 7
                Product

                SciELO Brazil

                Categories
                Artigos Técnicos

                soil systems,Sphingomonas chlorophenolica,rhyzoremediation,bioaugmentation,Pentachlorophenol degradation,solo,rizoremediação de solos,Pentaclorofenol

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