[Physiological and molecular biological mechanisms of heavy metal absorption and accumulation in hyperaccumulators].
In comparison with normal plants, hyperaccumulators have the ability to accumulate heavy metals in their shoots far exceeding those observed in soil, without suffering from detrimental effects. With the help of molecular technologies, the research on the mechanisms of heavy metal accumulation in hyperaccumulators has been made a great progress. A number of trace element transporters have been cloned by functional complementation with yeast mutants defective in metal absorption. The relations between glutathione, phytochelatins metallothioneins, organic acids and heavy metals have been studied by molecular technologies. This review concentrated on the physiological and molecular mechanisms of heavy metal absorption and sequestration in hyperaccumulators.
Li
Wenxue
W
Laboratory of Environmental Remediation, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China. liwx@igsnrr.ac.cn
Chen
Tongbin
T
D000042:Absorption; D001692:Biological Transport; D005978:Glutathione / Q000378:metabolism; D008667:Metalloproteins / Q000378:metabolism; D008668:Metallothionein / Q000378:metabolism; D019216:Metals, Heavy / Q000378:metabolism*; D054811:Phytochelatins; D010944:Plants / Q000378:metabolism*; D012989:Soil Pollutants / Q000378:metabolism*
D008667:Metalloproteins; D019216:Metals, Heavy; D012989:Soil Pollutants; D008668:Metallothionein; D054811:Phytochelatins; D005978:Glutathione