Imperial College London
Alternate

Dr. Rebekah E. T. Moore

Faculty of Engineering, Department of Earth Science & Engineering

Research Fellow
 
 
 
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Contact

 

r.moore13 Website

 
 
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Location

 

4.40/20Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Zhou:2023:10.1021/acs.est.2c08220,
author = {Zhou, J and Moore, RET and Rehkämper, M and Kreissig, K and Coles, B and Sun, Y and Li, Z and Luo, Y and Christie, P and Wu, L},
doi = {10.1021/acs.est.2c08220},
journal = {Environmental Science and Technology (Washington)},
pages = {5891--5902},
title = {Zinc supply affects cadmium uptake and translocation in the hyperaccumulator Sedum plumbizincicola as evidenced by isotope fractionation.},
url = {http://dx.doi.org/10.1021/acs.est.2c08220},
volume = {57},
year = {2023}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - This study employs stable isotope analysis to investigate the mechanisms of cadmium (Cd) and zinc (Zn) interaction in the metal hyperaccumulating plant species Sedum plumbizincicola. To this end, the Cd and Zn isotope compositions of root, stem, leaf, and xylem sap samples were determined during metal uptake and translocation at different Cd and Zn concentrations. The enrichment of light isotopes of both elements in plants during uptake was less pronounced at low metal supply levels, likely reflecting the switch from a low-affinity to a high-affinity transport system at lower levels of external metal supply. The lower δ114/110Cd values of xylem sap when treated with a metabolic inhibitor decreasing the active Cd uptake further supports the preference of heavier Cd isotopes during high-affinity transport. The Δ66Znplant-initial solution or Δ66Znplant-final solution values were similar at different Cd concentrations, indicating negligible interaction of Cd in the Zn uptake process. However, decreasing Zn supply levels significantly increased the enrichment of light Cd isotopes in plants (Δ114/110Cd = -0.08‰) in low-Cd treatments but reduced the enrichment of light Cd isotopes in plants (Δ114/110Cd = 0.08‰) under high Cd conditions. A systematic enrichment of heavy Cd and light Zn isotopes was found in root-to-shoot translocation of the metals. The Cd concentrations of the growth solutions thereby had no significant impact on Zn isotope fractionation during root-to-shoot translocation. However, the Δ114/110Cdtranslocation values hint at possible competition between Cd and Zn for transporters during root-to-shoot transfer and this may impact the transport pathway of Cd. The stable isotope data demonstrate that the interactions between the two metals influenced the uptake and transport mechanisms of Cd in S. plumbizincicola but had little effect on those of Zn.
AU  - Zhou,J
AU  - Moore,RET
AU  - Rehkämper,M
AU  - Kreissig,K
AU  - Coles,B
AU  - Sun,Y
AU  - Li,Z
AU  - Luo,Y
AU  - Christie,P
AU  - Wu,L
DO  - 10.1021/acs.est.2c08220
EP  - 5902
PY  - 2023///
SN  - 0013-936X
SP  - 5891
TI  - Zinc supply affects cadmium uptake and translocation in the hyperaccumulator Sedum plumbizincicola as evidenced by isotope fractionation.
T2  - Environmental Science and Technology (Washington)
UR  - http://dx.doi.org/10.1021/acs.est.2c08220
UR  - https://www.ncbi.nlm.nih.gov/pubmed/36988089
UR  - https://pubs.acs.org/doi/10.1021/acs.est.2c08220
UR  - http://hdl.handle.net/10044/1/103711
VL  - 57
ER  -
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