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Fate of cadmium in Elodea canadensis
Stockholm University, Faculty of Science, Department of Botany. Växtfysiologi. (Metallgruppen)
Stockholm University, Faculty of Science, Department of Botany. Växtfysiologi. (Metallgruppen)
2007 (English)In: Chemosphere, ISSN 0045-6535, E-ISSN 1879-1298, Chemosphere, Vol. 67, no 2, 365-375 p.Article in journal (Other (popular science, discussion, etc.)) Published
Abstract [en]

Elodea canadensis is a submersed macrophytes, widely distributed in stormwater treatment ponds and able to remove heavy metals

from water. This study examines the Cd uptake, translocation, and efflux patterns in Elodea. Several experiments were set up in a climate

chamber. To study the root and shoot Cd uptake, living and dead roots and shoots were treated with 109Cd in one- and two-compartment

systems. Furthermore, to examine Cd translocation and distribution, either roots or shoots were treated with 109Cd. Finally, the efflux of

Cd from roots and shoots, respectively, to the external solution was studied after loading whole plants with 109Cd. Results from the two

compartment studies show that Cd is accumulated via direct uptake by both roots and shoots of Elodea. The Cd accumulation proved

not to be metabolically dependent in Elodea, and the apoplastic uptake in particular was decreased by Cd pretreatment. In one week, up

to 23% of the root uptake was translocated to the shoots, while about 2% of the Cd accumulated by shoots was translocated to the roots.

Thus, slight dispersion of Cd is possible, while metal immobilization will not be directly mediated via the Elodea plant. The efflux experiment

proved that both shoots of dead plants and roots of living plants had a faster efflux than did shoots of living plants. This information

is relevant for an understanding of the fate of Cd in stormwater treatment ponds with Elodea.

Place, publisher, year, edition, pages
2007. Vol. 67, no 2, 365-375 p.
Keyword [en]
Uptake; Translocation; Exchange; Compartmentalization
URN: urn:nbn:se:su:diva-21816DOI: 10.1016/j.chemosphere.2006.09.090ISI: 000244629600020OAI: diva2:188343
Available from: 2007-12-14 Created: 2007-12-14 Last updated: 2010-08-09Bibliographically approved

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