Abstract:
:The removal of inorganic contaminants by plants is termed phytoextraction. Recent studies have looked at the feasibility of phytoextraction, and demonstrate that both good biomass yields and metal hyperaccumulation are required to make the process efficient. Adding chelating agents to soil to increase the bioavailability of contaminants can sometimes induce hyperaccumulation in normal plants, but may produce undesirable environmental risks. Thus, it is necessary to investigate the mechanisms responsible for hyperaccumulation, using natural hyperaccumulators as model plant species. Recent advances have been made in understanding the mechanisms responsible for hyperaccumulation of Zn, Cd, Ni and As by plants. Attempts to engineer metal tolerance and accumulation have so far been limited to Hg, As and Cd, and although promising results have been obtained they may be some way from practical application. More fundamental understanding of the traits and mechanisms involved in hyperaccumulation are needed so that phytoextraction can be optimised.
journal_name
Curr Opin Biotechnoljournal_title
Current opinion in biotechnologyauthors
McGrath SP,Zhao FJdoi
10.1016/s0958-1669(03)00060-0subject
Has Abstractpub_date
2003-06-01 00:00:00pages
277-82issue
3eissn
0958-1669issn
1879-0429pii
S0958166903000600journal_volume
14pub_type
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