Selenium volatilization and assimilation by hybrid poplar (Populus tremula x alba)
| Autor: | Elizabeth A. H. Pilon-Smits, C.M. Lytle, C. Shang, Norman Terry, M. P. de Souza, T. Lugo |
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| Rok vydání: | 1998 |
| Předmět: | |
| Zdroj: | Journal of Experimental Botany. 49:1889-1892 |
| ISSN: | 1460-2431 0022-0957 |
| DOI: | 10.1093/jxb/49.328.1889 |
| Popis: | Removal of Se by plants is based on the ability of plants to take up Se into tissues and to volatilize it. The predominThe poplar hybrid Populus tremula◊alba was shown ant volatile Se species is dimethylselenide, which is 500‐700 to volatilize significant amounts of selenium. The volat- times less toxic than inorganic Se species (Ganther et al., ilization rates were 230-fold higher from seleno- 1966). All the plant species that have been tested so far for methionine compared to selenite, and 1.5-fold higher Se volatilization, and most plants that are presently being from selenite than from selenate. X-ray absorption used for Se phytoremediation, are herbaceous plants (Terry spectroscopy showed that selenate was metabolized et al., 1992). A limitation of herbaceous plants, however, is slowly, but selenite was quickly converted to organic their shallow root system. Phytoremediation of Se pollution selenium. at depths below the root zone of these herbaceous plants (0.5 m) will be minimal. Compared to herbaceous plants |
| Databáze: | OpenAIRE |
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