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Journal of Experimental Botany, Vol 49, 1889-1892, Copyright © 1998 by Oxford University Press

ARTICLES

Short communication. Selenium volatilization and assimilation by hybrid poplar Populus tremula x alba

E Pilon-Smits, M de Souza, C Lytle, C Shang, T Lugo and N Terry
Department of Plant and Microbial Biology, University of California, 111 Koshland Hall, Berkeley, CA 94720-3102, USA; Present address: Department of Biology, Colorado State University, Fort Collins, CO 80523, USA; Corresponding author e-mail: nterry@nature.berkeley.edu

The poplar hybrid Populus tremula x alba was shown to volatilize significant amounts of selenium. The volatilization rates were 230-fold higher from selenomethionine compared to selenite, and 1.5-fold higher from selenite than from selenate. X-ray absorption spectroscopy showed that selenate was metabolized slowly, but selenite was quickly converted to organic selenium.Key words: Selenium, volatilization, phytoremediation, poplar, Populus tremula x alba.
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