Mechanisms and Strategies for Phytoremediation of Cadmium

INTRODUCTION
    Phytoremediation
    Advantages of  Phytoremediation
    Limitations of Phytoremediation

BIOAVAILABILITY OF CADMIUM 
    Cation Exchange Capacity (CEC)
    pH
    Soil Amendments
    Competitive Cations
    Fertilizer
    Mycorrhizae
    Chelation
       Phytochelatins (PCs)
       Phytochelatin Effectiveness
       Role of Sulfur in PCs
       Oxidative Stress
       Translocation
       Metallothioneins
       Organic Acids
       EDTA / EGTA

CADMIUM TOLERANCE AND
ACCUMULATION IN PLANTS
    Cell Wall Binding
    Reduced Transport
    Compartmentalization
    Chelation
    Phytoextraction factors
       Table 1.  Plant Accumulation
       Hyperaccumulators

CONCLUSIONS

LINKS

BIBLIOGRAPHY

Translocation

     The lack of  sulphur-containing compounds found in xylem tissue containing Cd suggests that PC-Cd complexes are not translocated. Cd that is translocated to above ground tissue is probably complexed by other chelators (Salt, et al. 1995), probably organic acids.
 

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Page Created 4-18-00
Sam Cox
Department of Horticulture
Colorado State University
samcox@lamar.colostate.edu
http://lamar.colostate.edu/~samcox/index.htm