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

Role of Sulfur

     Glutathione contains sulfur, which is important in the stabilization of the complex via disulfide bonds. It has been shown that the stability of the PC-Cd complex is enhanced by additional sulfur ions once the complex is in the vacuole (Oritz, et al. 1992). Sulfate salts have reportedly increased Cd uptake and tolerance by facilitating Sulfur  uptake, which facilitates glutathione production, which in turn increases PC production which then allows the plant root to complex more Cd, reducing toxicity and allowing more Cd to be taken up (Strasdeit, et al. 1991).
 

Previous                    Next