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

Reduced Transport

     Little is known about transport mechanisms for most metals. It appears that transport of cations across cell membranes is achieved by transporters. Recently, Cu, Zn and Fe transporters were cloned from A. thaliana (Salt, et al. 1998). Blocking transcription of genes coding for transporters could increase tolerance of plants to heavy metals, but this would not necessarily help phytoextraction (Prasad, 1995).
 

Previous                    Next