Heavy metal pollution in soil has been a serious problem and a matter of great urgency to resolve in our country. Studying the heavy metal tolerance mechanism of plant, cloning the related genes and improving plant ability of heavy metal tolerance by genetic engineering technique have become a valid path to decontaminate the polluted soil. Metallothionein (MT) is a kind of low molecular, cysteine-rich and heavy metal-binding protein. MT already caused the people to value highly in controlling the ...