The cellular redox state as a modulator in cadmium and copper responses in Arabidopsis thaliana seedlings
| Autor: | Yves Guisez, Suzy Van Sanden, Jan V. Colpaert, Joske Ruytinx, Nathalie Vanhoudt, Frank Van Belleghem, Kelly Opdenakker, Tony Remans, Nele Horemans, Karen Smeets, Ann Cuypers, Els Keunen, Jaco Vangronsveld |
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| Přispěvatelé: | Plant Genetics, Microbiology, Department of Bio-engineering Sciences |
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
Plant Roots/drug effects
Arabidopsis thaliana Physiology Arabidopsis Gene Expression Plant Science Signal transduction medicine.disease_cause Plant Roots Plant Proteins/genetics Lipid peroxidation chemistry.chemical_compound Gene Expression Regulation Plant NADPH OXIDASE OXYGEN GENE NETWORK SUPEROXIDE-DISMUTASE OXIDATIVE STRESS ROOTS Plant Proteins chemistry.chemical_classification Regulation of gene expression PRIMARY LEAVES Cellular redox state LIPID-PEROXIDATION Respiratory burst Cell biology Biochemistry Oxidation-Reduction HEAVY-METAL STRESS Cadmium Plant Leaves/drug effects Oxidative Stress/drug effects Oxidative phosphorylation Gene Expression/drug effects Biology Genes Plant Redox Models Biological Genes Plant/genetics SIGNALING PATHWAYS Copper/metabolism Reactive Oxygen Species/metabolism Stress Physiological medicine Seedlings/drug effects Hydrogen Peroxide/metabolism Reactive oxygen species Hydrogen Peroxide biology.organism_classification Plant Leaves Arabidopsis/drug effects chemistry Seedlings PHASEOLUS-VULGARIS Reactive Oxygen Species Agronomy and Crop Science Cadmium/metabolism Oxidative stress Copper |
| Zdroj: | Journal of Plant Physiology, 168(4), 309-316. Elsevier GmbH-Urban und Fischer Journal of plant physiology Cuypers, A, Smeets, K, Ruytinx, J, Opdenakker, K, Keunen, E, Remans, T, Horemans, N, Vanhoudt, N, Van Sanden, S, Van Belleghem, F, Guisez, Y, Colpaert, J & Vangronsveld, J 2011, ' The cellular redox state as a modulator in cadmium and copper responses in Arabidopsis thaliana seedlings ', Journal of Plant Physiology, vol. 168, no. 4, pp. 309-316 . https://doi.org/10.1016/j.jplph.2010.07.010 |
| ISSN: | 0176-1617 |
| DOI: | 10.1016/j.jplph.2010.07.010 |
| Popis: | The cellular redox state is an important determinant of metal phytotoxicity. In this study we investigated the influence of cadmium (Cd) and copper (Cu) stress on the cellular redox balance in relation to oxidative signalling and damage in Arabidopsis thaliana. Both metals were easily taken up by the roots, but the translocation to the aboveground parts was restricted to Cd stress. In the roots, Cu directly induced an oxidative burst, whereas enzymatic ROS (reactive oxygen species) production via NADPH oxidases seems important in oxidative stress caused by Cd. Furthermore, in the roots, the glutathione metabolism plays a crucial role in controlling the gene regulation of the antioxidative defence mechanism under Cd stress. Metal-specific alterations were also noticed with regard to the microRNA regulation of CuZnSOD gene expression in both roots and leaves. The appearance of lipid peroxidation is dual: it can be an indication of oxidative damage as well as an indication of oxidative signalling as lipoxygenases are induced after metal exposure and are initial enzymes in oxylipin biosynthesis. In conclusion, the metal-induced cellular redox imbalance is strongly dependent on the chemical properties of the metal and the plant organ considered. The stress intensity determines its involvement in downstream responses in relation to oxidative damage or signalling. |
| Databáze: | OpenAIRE |
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