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Accumulation and distribution of 241Am in the biomass of freshwater plant Elodea canadensis

Published online by Cambridge University Press:  06 June 2009

J. Barescut ,
T. A. Zotina ,
G. S. Kalachova  and
A. Ya. Bolsunovsky
T. A. Zotina*
Affiliation:
Institute of Biophysics SB RAS, Akademgorodok, 660036 Krasnoyarsk, Russia
G. S. Kalachova
Affiliation:
Institute of Biophysics SB RAS, Akademgorodok, 660036 Krasnoyarsk, Russia
A. Ya. Bolsunovsky
Affiliation:
Institute of Biophysics SB RAS, Akademgorodok, 660036 Krasnoyarsk, Russia
*
t_zotina@ibp.ru
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Abstract

Accumulation of transuranic element 241Am by photoassimilating organs and its distribution in fractions of the biomass of aquatic plant Elodea canadensis have been investigated in laboratory batch experiments. Americium was taken up by apical shoots of Elodea from water. Of the activity accumulated by the shoots, up to 80% of 241Am was detected in the leaves and 20% in the stems. Americium concentration in apical leaves was several times higher than in distal leaves. Of the 241Am activity concentrated in the shoots, 95% was bound to cell walls, membranes and organelles and 5% of the radionuclide was dissolved in cytoplasm. Less than 1% of americium accumulated in the biomass was found in the lipid extract; up to 10% of americium was bound to proteins and carbohydrates; the major part of the radionuclide (about 90%) was registered in the cell wall fraction that mainly contained cellulose-like polysaccharides. Biomass treatment with hydrochloric acid resulted in desorption of about 70% of americium, mostly from the polysaccharides.

Type
Research Article
Information
Radioprotection , Volume 44 , Issue 5: ECORAD 2008 - Radioecology and Environmental Radioactivity , 2009 , pp. 65 - 69
Copyright
© EDP Sciences, 2009

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