Remediation of soil contaminated by heavy metals remains a difficult problem in the world. Phytoremediation is a new technique to eliminate contaminants or weaken their adverse effects on ecosystem by such means as phytoextraction, phytodegradation, phytovolatilization, rhizofiltration, phytostabilization and hydraulic pumping. Hyperaccumulator and accumulator plants play an important role in soil remediation. In the past decade some achievements have been made on the selection of hyperaccumulator plants and investigation of their mechanism on detoxification and hyperaccumulation with the help of molecule biology and gene technique as well as rhizosphere treatment and planting management. With the introduction of molecular biology and gene technique, we can expect a breakthrough in this technology in near future.
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