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231225s2001 xx |||||o 00| ||eng c |
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|a 10.1046/j.1469-8137.2001.00003.x
|2 doi
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|a eng
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1 |
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|a Lombi, E
|e verfasserin
|4 aut
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|a Physiological evidence for a high-affinity cadmium transporter highly expressed in a Thlaspi caerulescens ecotype
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|c 2001
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Revised 28.09.2023
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|a published: Print
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|a Citation Status PubMed-not-MEDLINE
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|a • 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 Vmax 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
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|a Journal Article
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|a Thlaspi caerulescens
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| 650 |
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|a cadmium
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| 650 |
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4 |
|a ecotypes
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| 650 |
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|a hyperaccumulation
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| 650 |
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|a phytoremediation
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| 650 |
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|a translocation
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| 650 |
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|a uptake kinetics
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| 650 |
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4 |
|a zinc
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| 700 |
1 |
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|a Zhao, F J
|e verfasserin
|4 aut
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| 700 |
1 |
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|a McGrath, S P
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Young, S D
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Sacchi, G A
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t The New phytologist
|d 1979
|g 149(2001), 1 vom: 28. Jan., Seite 53-60
|w (DE-627)NLM09818248X
|x 1469-8137
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|g volume:149
|g year:2001
|g number:1
|g day:28
|g month:01
|g pages:53-60
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