Plant Rhizosphere Effects on Metal Mobilization and Transport

Fan, Teresa W.-M ; Higashi, Richard M. ; Crowley, David E.

University of California, Davis

关键词: 63 Radiation, Thermal, And Other Environmental Pollutant Effects On Living Organisms And Biological Materials;    Removal;    Stabilization;    Bioremediation;    Ecosystems;   

DOI  :  10.2172/827412
RP-ID  :  EMSP-55118--2000
RP-ID  :  FG07-93ER20255
RP-ID  :  827412

美国|英语

来源: UNT Digital Library

【 摘 要 】

The myriad of human activities including strategic and energy development at various DOE installations have resulted in the contamination of soils and waterways that can seriously threaten human and ecosystem health. Development of efficacious and economical remediation technologies is needed to ameliorate these immensely costly problems. Bioremediation (both plant and microbe-based) has promising potential to meet this demand but still requires advances in fundamental knowledge. For bioremediation of heavy metals, the three-way interaction of plant root, microbial community, and soil organic matter (SOM) in the rhizosphere is critically important for long-term sustainability but often underconsidered. Particularly urgent is the need to understand processes that lead to metal ion stabilization in soils, which is crucial to all of the goals of bioremediation: removal, stabilization, and transformation. We have developed the tools for probing the chemistry of plant rhizosphere and generated information regarding the role of root exudation and metabolism for metal mobilization and sequestration.