A - Papers appearing in refereed journals
Lombi, E., Zhao, F-J., McGrath, S. P., Young, S. D. and Sacchi, G. A. 2001. Physiological evidence for a high-affinity cadmium transporter highly expressed in a Thlaspi caerulescens ecotype. New Phytologist. 149 (1), pp. 53-60. https://doi.org/10.1046/j.1469-8137.2001.00003.x
Authors | Lombi, E., Zhao, F-J., McGrath, S. P., Young, S. D. and Sacchi, G. A. |
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Abstract | Uptake kinetics and translocation characteristics of cadmium and zinc are presented for two contrasting ecotypes of the Cd/Zn hyperaccumulator Thlaspi caerulescens, Ganges (southern France) and Prayon (Belgium). Experiments using radioactive isotopes were designed to investigate the physiology of Cd and Zn uptake, and a pressure-chamber system was employed to collect xylem sap. In contrast to similar Zn uptake and translocation, measurements of concentration-dependent influx of Cd revealed marked differences between ecotypes. Ganges alone showed a clear saturable component in the low Cd concentration range; maximum influx V(max) for Cd was fivefold higher in Ganges; and there was a fivefold difference in the Cd concentration in xylem sap. Addition of Zn to the uptake solution at equimolar concentration to Cd did not decrease Cd uptake by Ganges, but caused a 35% decrease in Prayon. There is strong physiological evidence for a high-affinity, highly expressed Cd transporter in the root cell plasma membranes of the Ganges ecotype of T. caerulescens. This raises evolutionary questions about specific transporters for non-essential metals. The results also show the considerable scope for selecting hyperaccumulator ecotypes to achieve higher phytoextraction efficiencies. |
Keywords | Plant Sciences |
Year of Publication | 2001 |
Journal | New Phytologist |
Journal citation | 149 (1), pp. 53-60 |
Digital Object Identifier (DOI) | https://doi.org/10.1046/j.1469-8137.2001.00003.x |
Open access | Published as non-open access |
Funder project or code | 443 |
512 | |
Heavy metal uptake by plants | |
Remidiation of metal contaminated soils by plants (PHYTOREM) | |
Soil protection and remediation by chemical and biological approaches | |
Project: 4323 | |
ISSN | 0028646X |
Publisher | Wiley |
Permalink - https://repository.rothamsted.ac.uk/item/886v4/physiological-evidence-for-a-high-affinity-cadmium-transporter-highly-expressed-in-a-thlaspi-caerulescens-ecotype