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Ecotoxicology and environmental safety v.147, 2018년, pp.151 - 156   SCI SCIE
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DDTs-induced antioxidant responses in plants and their influence on phytoremediation process

Mitton, Francesca M. (Laboratorio de Ecotoxicología y Contaminación Ambiental, Instituto de Investigaciones Marinas y Costeras (IIMyC), Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata (UNMdP) – ) ; Gonzalez, Mariana (Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Dean Funes 3350, Mar del Plata 7600, Argentina ) ; Monserrat, José (Laboratorio de Ecotoxicología y Contaminación Ambiental, Instituto de Investigaciones Marinas y Costeras (IIMyC), Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata (UNMdP) – ) ; M. (Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Dean Funes 3350, Mar del Plata 7600, Argentina ) ; Miglioranza, Karina S.B. (Universidade Federal de Rio Grande - FURG, Instituto de Ciências Biológicas (ICB), Campus Carreiros Cx. Postal 474, Av. Itália km 8 s/n (96200-970), Rio Grande, Rio Grande do Sul (RS), Brazil ) ;
  • 초록  

    Abstract Phytoremediation is a low cost technology based on the use of plants to remove a wide range of pollutants from the environment, including the insecticide DDT. However, some pollutants are known to enhance generation of reactive oxygen species (ROS), which can generate toxic effects on plants affecting the phytoremediation efficiency. This study aims to analyze the potential use of antioxidant responses as a measure of tolerance to select plants for phytoremediation purposes. Tomato and zucchini plants were grown for 15 days in soils contaminated with DDTs (DDT + DDE + DDD). Protein content, glutathione-S-transferase (GST), glutathione reductase (GR), glutathione peroxidase (GPx) and catalase (CAT) activities were measured in plant tissues. Exposure to DDTs did not affect protein content or CAT activity in any of the species. GST, GR and GPx activity showed different responses in exposed and control tomato plants. After DDTs exposure, tomato showed increased GR and GPX activity in stems and leaves, respectively, and a decrease in the GST activity in roots. As no effects were observed in zucchini, results suggest different susceptibility and/or defense mechanisms involved after pesticide exposure. Finally, both species differed also in terms of DDTs uptake and translocation. The knowledge about antioxidant responses induced by pesticides exposure could be helpful for planning phytoremediation strategies and for the selection of tolerant species according to particular scenarios. Highlights Antioxidant response on tomato and zucchini plants was linked to tissue pesticide levels. Antioxidant responses are good tolerance criteria for phytoremediation studies. Tomato plants present an antioxidant response against DDT uptake responsible of the high pesticide levels into the roots.


  • 주제어

    Tomato .   Zucchini .   Antioxidant enzymes .   Phytoremediation.  

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