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Title: Radionuclide complexation in xylem exudates of plants

Abstract

The plant xylem is the primary avenue for transport of nutrient and pollutant elements from the roots of aerial portions of the plant. It is proposed that the transport of reactive or hydrolyzable ions is facilitated by the formation of stable/soluble complexes with organic metabolites. The xylem exudates of soybean (Glycine max cv. Williams) were characterized as to their inorganic and organic components, complexation patterns for radionuclides, both in vivo and in vitro, and for class fractions of exudates using thin-layer electrophoresis. The radionuclides Pu-238 and Fe-59 were found primarily as organic acid complexes, while Ni-63 and Cd-109 were associated primarily with components of the amono acid fraction. Technetium-99 was found to be uncomplexed and transported as the pertechnetate ion. It was not possible to duplicate fully complexes formed in vivo by back reaction with whole exudates or class fractions, indicating the possible importance of plant induction processes, reaction kinetics and/or the formation of mixed ligand complexes. 28 refs., 4 figs.

Authors:
; ; ;
Publication Date:
Research Org.:
Pacific Northwest Labs., Richland, WA (USA)
OSTI Identifier:
5607826
Report Number(s):
PNL-SA-12549; CONF-850473-3
ON: DE85013446
DOE Contract Number:
AC06-76RL01830
Resource Type:
Conference
Resource Relation:
Conference: Seminar on the speciation of fission products in the environment, Oxford, UK, 16 Apr 1985
Country of Publication:
United States
Language:
English
Subject:
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.; CADMIUM 109; TRANSLOCATION; GLYCINE HISPIDA; RADIONUCLIDE KINETICS; IRON 59; NICKEL 63; PLUTONIUM 238; TECHNETIUM 99; CHEMICAL COMPOSITION; COMPLEXES; ELECTROPHORESIS; EXPERIMENTAL DATA; ISOMERIC NUCLEI; PLANT SAP; ACTINIDE ISOTOPES; ACTINIDE NUCLEI; ALPHA DECAY RADIOISOTOPES; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; BIOLOGICAL MATERIALS; CADMIUM ISOTOPES; DATA; DAYS LIVING RADIOISOTOPES; ELECTRON CAPTURE RADIOISOTOPES; EVEN-EVEN NUCLEI; EVEN-ODD NUCLEI; HEAVY NUCLEI; HOURS LIVING RADIOISOTOPES; INFORMATION; INTERMEDIATE MASS NUCLEI; IRON ISOTOPES; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; LEGUMINOSAE; MATERIALS; NICKEL ISOTOPES; NUCLEI; NUMERICAL DATA; ODD-EVEN NUCLEI; PLANTS; PLUTONIUM ISOTOPES; RADIOISOTOPES; TECHNETIUM ISOTOPES; YEARS LIVING RADIOISOTOPES; 560173* - Radiation Effects- Nuclide Kinetics & Toxicology- Plants- (-1987)

Citation Formats

Cataldo, D.A., McFadden, D.M., Garland, T.R., and Wildung, R.E. Radionuclide complexation in xylem exudates of plants. United States: N. p., 1985. Web.
Cataldo, D.A., McFadden, D.M., Garland, T.R., & Wildung, R.E. Radionuclide complexation in xylem exudates of plants. United States.
Cataldo, D.A., McFadden, D.M., Garland, T.R., and Wildung, R.E. Mon . "Radionuclide complexation in xylem exudates of plants". United States. doi:.
@article{osti_5607826,
title = {Radionuclide complexation in xylem exudates of plants},
author = {Cataldo, D.A. and McFadden, D.M. and Garland, T.R. and Wildung, R.E.},
abstractNote = {The plant xylem is the primary avenue for transport of nutrient and pollutant elements from the roots of aerial portions of the plant. It is proposed that the transport of reactive or hydrolyzable ions is facilitated by the formation of stable/soluble complexes with organic metabolites. The xylem exudates of soybean (Glycine max cv. Williams) were characterized as to their inorganic and organic components, complexation patterns for radionuclides, both in vivo and in vitro, and for class fractions of exudates using thin-layer electrophoresis. The radionuclides Pu-238 and Fe-59 were found primarily as organic acid complexes, while Ni-63 and Cd-109 were associated primarily with components of the amono acid fraction. Technetium-99 was found to be uncomplexed and transported as the pertechnetate ion. It was not possible to duplicate fully complexes formed in vivo by back reaction with whole exudates or class fractions, indicating the possible importance of plant induction processes, reaction kinetics and/or the formation of mixed ligand complexes. 28 refs., 4 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Apr 01 00:00:00 EST 1985},
month = {Mon Apr 01 00:00:00 EST 1985}
}

Conference:
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