Metal ion ligands in hyperaccumulating plants.
Metal-hyperaccumulating plants have the ability to take up extraordinary quantities of certain metal ions without succumbing to toxic effects. Most hyperaccumulators select for particular metals but the mechanisms of selection are not understood at the molecular level. While there are many metal-binding biomolecules, this review focuses only on ligands that have been reported to play a role in sequestering, transporting or storing the accumulated metal. These include citrate, histidine and the phytosiderophores. The metal detoxification role of metallothioneins and phytochelatins in plants is also discussed.
Callahan
Damien L
DL
School of Chemistry, The University of Melbourne, 3010 Melbourne, Victoria, Australia.
Baker
Alan J M
AJ
Kolev
Spas D
SD
Wedd
Anthony G
AG
D001665:Binding Sites; D001692:Biological Transport; D019343:Citric Acid / Q000378:metabolism; D005978:Glutathione / Q000378:metabolism; D006639:Histidine / Q000378:metabolism; D008658:Inactivation, Metabolic; D008024:Ligands; D008667:Metalloproteins / Q000378:metabolism; D008668:Metallothionein / Q000378:metabolism; D008670:Metals / Q000378:metabolism* / Q000633:toxicity*; D010455:Peptides / Q000378:metabolism; D054811:Phytochelatins; D018521:Plant Physiological Phenomena; D010944:Plants / Q000187:drug effects* / Q000235:genetics / Q000378:metabolism; D017262:Siderophores / Q000378:metabolism
D008024:Ligands; D008667:Metalloproteins; D008670:Metals; D010455:Peptides; D017262:Siderophores; D019343:Citric Acid; D006639:Histidine; D008668:Metallothionein; D054811:Phytochelatins; D005978:Glutathione