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- Title
Cadmium accumulation in populations of <em>Thlaspi caerulescens</em> and <em>Thlaspi goesingense</em>.
- Authors
Lombi, E.; Zhao, F. L.; Dunham, S. J.; McGrath, S. P.
- Abstract
The capacity to accumulate cadmium (Cd) and zinc (Zn) was compared in <em>Thlaspi goesingense</em>and four populations of <em>Thlaspi coerulescens</em>. Two populations of <em>T. coerulescens</em> were grown hydroponics at five concentration of Cd. In addition, plants were grown in pots containing compost in which three different concentration of Cd and two concentrations of Zn were added. A field trial was conducted to compare Zn and Cd uptake by three populations of <em>T. caerulescens</em> on nine selected plots of the Woburn Market Garden Experiment (UK) which had been contaminated to different degree with heavy metals owing to past applications of sewage sludge. Results shows that the four populations of <em>T. caerulescens</em> had the same ability to hyperaccumulate Zn but were significantly different in terms cf Cd accumulation. Two population of <em>T. caerulescens</em> from Southern France accumulated much more Cd than the populations from Prayon (Belgium) and Whitesike (UK). Generally, uptake of Cd was not decreased by increased concentrations of Zn in the substrate. These results indicate that the mechanisms of Cd and Zn hyperaccumulation are not identical in this species. This is the first report of hyperaccumulation of Cd by <em>T. goesingense</em>, but the growth of this species was markedly reduced by the large concentrations in the substrate. Future work should focus on the differences between Cd and Zn uptake in hyperaccumulator plants at the species and population level.
- Subjects
CADMIUM; ZINC; PHYTOREMEDIATION; HYDROPONICS; HEAVY metals; PLANTS
- Publication
New Phytologist, 2000, Vol 145, Issue 1, p11
- ISSN
0028-646X
- Publication type
Article
- DOI
10.1046/j.1469-8137.2000.00560.x