Effects of selenite and selenate on the antioxidant systems inSenecio scandensL
| Autor: | Silvio Dipierro, Costantino Paciolla, S De Leonardis |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
chemistry.chemical_classification
Reactive oxygen species Methionine Antioxidant medicine.medical_treatment food and beverages chemistry.chemical_element Plant Science medicine.disease_cause Selenate Lipid peroxidation chemistry.chemical_compound Biochemistry chemistry medicine Ecology Evolution Behavior and Systematics Oxidative stress Selenium Cysteine |
| Zdroj: | Plant Biosystems - An International Journal Dealing with all Aspects of Plant Biology. 145:253-259 |
| ISSN: | 1724-5575 1126-3504 |
| DOI: | 10.1080/11263504.2010.509942 |
| Popis: | Selenate and selenite are the most prevalent bioavailable selenium (Se) forms and most easily taken up by plants. Some studies indicate that they are differently absorbed and accumulated in plants and that selenium is toxic if accumulated at high concentrations. Toxicity is due to substitution of sulphur by selenium in cysteine and methionine aminoacids with alteration of the tertiary structure and catalytic activity of proteins and with inhibition of enzymes involved in chlorophyll biosynthesis. Moreover, the interaction between Se and thiol groups induces loss of efficiency of plant defence systems and increases the reactive oxygen species (ROS) production thus enhancing the oxidative stress. To further elucidate the role of Se in higher plants, in this study the antioxidative response to the phytotoxicity of selenite and selenate in Senecio scandens L. was evaluated. The data indicate that while selenite induces oxidative stress enhancing ROS production, lipid peroxidation and the oxidised for... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
| Nepřihlášeným uživatelům se plný text nezobrazuje | K zobrazení výsledku je třeba se přihlásit. |