Cadmium distribution and chemical fate in soybean plants [Environmental pollutants]

The distribution and chemical behavior of Cd2+ in tissues and its chemical form in xylem water of soybean plants (cv. Williams) were investigated. Following root absorption, Cd is strongly retained by roots, with only 2% of the accumulated Cd being transported to leaves; as much as 8% was transporte...

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Bibliographic Details
Published in:Plant physiology (Bethesda) 1981-10, Vol.68 (4), p.835-839
Main Authors: Cataldo, Dominic A., Garland, Thomas R., Raymond E. Wildung
Format: Article
Language:English
Subjects:
Amino acids
Cadmium
Cotyledons
Fractionation
Glycine max
Leaves
Plant roots
Plant tissues
Plants
Soybeans
Xylem
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Summary:The distribution and chemical behavior of Cd2+ in tissues and its chemical form in xylem water of soybean plants (cv. Williams) were investigated. Following root absorption, Cd is strongly retained by roots, with only 2% of the accumulated Cd being transported to leaves; as much as 8% was transported to seeds during seed filling. In vivo xylem exudates contained two anionic Cd complexes in addition to inorganic forms of Cd. Once accumulated in root and leaf tissues, Cd rapidly equilibrated between the insoluble, soluble, and organelle fractions, Of the solubles, which contain 50% of the Cd, >50% was associated with components of >10,000 molecular weight, and
ISSN:0032-0889
1532-2548
DOI:10.1104/pp.68.4.835