The Role of Xylem in the Differential Accumulation of Cadmium in Soybean Cultivars

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The Role of Xylem in the Differential Accumulation of Cadmium in Soybean Cultivars

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Title: The Role of Xylem in the Differential Accumulation of Cadmium in Soybean Cultivars
Author: Jennett, Tyson
Department: Department of Land Resource Science
Program: Land Resource Science
Advisor: Hale, Beverley
Abstract: This thesis is the first report linking differential distribution of cadmium (Cd) among tissues of hydroponically-grown soybean with Cd amendments – lower seed Cd-accumulating OAC Champion and higher seed Cd-accumulating OAC Bayfield – and the mechanisms responsible for these differences. OAC Champion retains 94% (64% for OAC Bayfield) of accumulated Cd in the root stock and Cd in its xylem sap is eleven-fold less concentrated than OAC Bayfield by seed fill. Though the movement of Cd to shoots is more restricted in OAC Champion, the concentration in some seed still approximates or exceeds 0.1 mg Cd • kg-1, indicating that in soils with elevated available Cd, there is potential for many cultivars of soybean to exceed the new suggested maximum for soybean, under an amendment to regulation (EC) No 1881/2006. Phytic acid was also assayed in seed tissue and OAC Bayfield was found to contain the highest concentrations.
URI: http://hdl.handle.net/10214/2805
Date: 2011-07-26


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http://creativecommons.org/licenses/by-nc-nd/2.5/ca/ Except where otherwise noted, this item's license is described as http://creativecommons.org/licenses/by-nc-nd/2.5/ca/

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