Phytochelatins (PCs) commonly found in plants are verified to be closely related to the phyto-tolerance of metal heavy. Phytochelatins and their complexes are low molecular weight (LMW) complexes which are rich in cysteine analogues. It ha s been proven that PCs is synthesized through enzyme catalysis reaction using gl utathione (GSH) as the substrate and regulated by relevant genes. Genes involved in PC synthesis have been isolated and identified in the mutants of Arabidopsis, a model plant widely used in ...