Arsenate tolerance in Silene paradoxa does not rely on phytochelatin-dependent sequestration
| Autor: | Henk Schat, F. Galardi, Wilma M. ten Bookum, Riet Vooijs, R. Gabbrielli, Jos A.C. Verkleij, Cristina Gonnelli, Miluscia Arnetoli |
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| Přispěvatelé: | Molecular Cell Biology, Ecology and Plant Physiology, Animal Ecology |
| Jazyk: | angličtina |
| Rok vydání: | 2008 |
| Předmět: |
Health
Toxicology and Mutagenesis Population Industrial Waste Caryophyllaceae chemistry.chemical_element Toxicology Plant Roots Mining Arsenic chemistry.chemical_compound Botany Phytochelatins Soil Pollutants Silene education education.field_of_study biology Arsenate food and beverages Drug Tolerance General Medicine Glutathione biology.organism_classification Pollution Zinc chemistry Shoot Arsenates Phytochelatin Copper Plant Shoots Environmental Monitoring |
| Zdroj: | Environmental Pollution, 152, 585-591. Elsevier Limited Arnetoli, M, Vooijs, H, ten Bookum, W M, Galardi, F, Gonelli, C, Gabbrielli, R, Schat, H & Verkleij, J A C 2008, ' Arsenate tolerance in Silene paradoxa does not rely on phytochelatin-dependent sequestration. ', Environmental Pollution, vol. 152, pp. 585-591 . https://doi.org/10.1016/j.envpol.2007.07.002 |
| ISSN: | 1873-6424 0269-7491 |
| Popis: | Arsenate tolerance, As accumulation and As-induced phytochelatin accumulation were compared in populations of Silene paradoxa, one from a mine site enriched in As, Cu and Zn, the other from an uncontaminated site. The mine population was significantly more arsenate-tolerant. Arsenate uptake and root-to-shoot transport were slightly but significantly higher in the non-mine plants. The difference in uptake was quantitatively insufficient to explain the difference in tolerance between the populations. As accumulation in the roots was similar in both populations, but the mine plants accumulated much less phytochelatins than the non-mine plants. The mean phytochelatin chain length, however, was higher in the mine population, possibly due to a constitutively lower cellular glutathione level. It is argued that the mine plants must possess an arsenic detoxification mechanism other than arsenate reduction and subsequent phytochelatin-based sequestration. This alternative mechanism might explain at least some part of the superior tolerance in the mine plants. © 2007 Elsevier Ltd. All rights reserved. |
| Databáze: | OpenAIRE |
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