1. A 3D ecotoxi-topological profile: Using concentration-time-response surfaces to show peroxidase activity in Zea mays (L.) exposed to aluminium or arsenic in hydroponic conditions
- Author
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Hela Toumi, Cleder A. Somensi, Sylvie Cotelle, Claudemir M. Radetski, Renan C. Testolin, Fernanda Engel, Jean-François Férard, Rogério Corrêa, Universidade do Vale do Itajaí (UNIVALI), Laboratoire Interdisciplinaire des Environnements Continentaux (LIEC), Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Terre et Environnement de Lorraine (OTELo), Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Instituto Federal Catarinense (IFC), Laboratório de Remediação Ambiental [UNIVALI], Faculté des Sciences de Bizerte [Université de Carthage], and Université de Carthage - University of Carthage
- Subjects
Health, Toxicology and Mutagenesis ,Ecotoxicity tests ,0208 environmental biotechnology ,Biomass ,02 engineering and technology ,010501 environmental sciences ,Plant Roots ,01 natural sciences ,chemistry.chemical_compound ,Hydroponics ,Aluminium ,2. Zero hunger ,chemistry.chemical_classification ,biology ,[SDE.IE]Environmental Sciences/Environmental Engineering ,General Medicine ,Pollution ,Aluminium III ,Horticulture ,Peroxidases ,Phytotoxicity ,Oxidation-Reduction ,Peroxidase ,Environmental Engineering ,Peroxidase activity ,Phytotoxicity test ,[SDE.MCG]Environmental Sciences/Global Changes ,chemistry.chemical_element ,Zea mays ,Arsenic ,Time ,Environmental Chemistry ,0105 earth and related environmental sciences ,Arsenic pollution ,Maize Zea mays L ,Public Health, Environmental and Occupational Health ,General Chemistry ,[SDE.ES]Environmental Sciences/Environmental and Society ,Enzyme assay ,020801 environmental engineering ,Plant Leaves ,Enzyme ,chemistry ,Seedlings ,biology.protein ,[SDE.BE]Environmental Sciences/Biodiversity and Ecology ,Aluminum ,Toxicant - Abstract
International audience; This study sought to use concentration-time-response surfaces to show the effects of exposure to toxic (semi-)metals on peroxidase activity in higher plants as a function of exposure-concentration and exposure-time. Maize (Zea mays L.) seedlings (i.e., leaves and roots) were exposed to arsenic (as As3+) or aluminium (as Al3+) under hydroponic conditions, and their biomass and peroxidase enzyme responses were assessed at different concentration-time-exposures. The 3D ecotoxi-profile generated with these data showed two distinct regions: the first region is formed by exposures (i.e., points for time-concentration pairings) that were not statistically different from the results of the control points (i.e., zero toxicant concentration and all exposure-times), whereas the second region is formed by exposure pairings with results that were statistically different to those obtained from control pairings. Overall, the data show that enzyme activity increased over a shorter exposure-time when there was an increase in the exposure-concentration of the toxicant, which can be seen on a 3-D toxicity profile. We propose that quantitative relationship ratios from different assessed endpoints (e.g., biomass and enzyme activity) and enzymatic concentration-time-response surfaces could be helpful in the field of environmental-policy management.
- Published
- 2021
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