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Zinc Ligands in the Metal Hyperaccumulator Thlaspi caerulescens As Determined Using X-ray Absorption Spectroscopy
Abstract
Using the noninvasive technique of X-ray absorption spectroscopy (XAS), we have been able to determine the ligand environment of Zn in different tissues of the Zn-hyperaccumulator Thlaspi caerulescens (J. & C. Presl.). The majority of intracellular Zn in roots of T. caerulescens was found to be coordinated with histidine. In the xylem sap. Zn was found to be transported mainly as the free hydrated Zn 2+ cation with a smaller proportion coordinated with organic acids. In the shoots, Zn coordination occurred mainly via organic acids, with a smaller proportion present as the hydrated cation and coordinated with histidine and the cell wall. Our data suggest that histidine plays an important role in Zn homeostasis in the roots, whereas organic acids are involved in xylem transport and Zn storage in shoots.
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Cited by
Heavy metal hyperaccumulating plants: how and why do they do it? And what makes them so interesting
Rascio, N., & Navari-Izzo, F. (2011) · Plant Science · doi:10.1016/j.plantsci.2010.08.016 · Cited by 2,012
Zinc transporters and the cellular trafficking of zinc
Eide, D. J. (2006) · Biochimica et Biophysica Acta (BBA) - Molecular Cell Research · doi:10.1016/j.bbamcr.2006.03.005 · Cited by 874
Phytoremediation of metals, metalloids, and radionuclides
McGrath, S. P., Zhao, J., & Lombi, E. (2002) · Advances in Agronomy · doi:10.1016/s0065-2113(02)75002-5 · Cited by 506
Cadmium accumulation in populations of Thlaspi caerulescens and Thlaspi goesingense
LOMBI, E., ZHAO, F. J., DUNHAM, S. J., & McGRATH, S. P. (2000) · New Phytologist · doi:10.1046/j.1469-8137.2000.00560.x · Cited by 384
Thlaspi caerulescens, an attractive model species to study heavy metal hyperaccumulation in plants
Assunção, A. G. L., Schat, H., & Aarts, M. G. M. (2003) · New Phytologist · doi:10.1046/j.1469-8137.2003.00820.x · Cited by 358
Metadata
- Authors
- Salt, D. E., Prince, R. C., Baker, A. J. M., Raskin, I., & Pickering, I. J.
- Venue
- Environmental Science & Technology
- Publisher
- American Chemical Society (ACS)
- Published
- 1999-01-21
- Volume
- 33
- Issue
- 5
- Pages
- 713-717
- ISSN
- 0013-936X (ISSN-L)
- 1520-5851
- OpenAlex
- W2048557200
- Cited by
- 404
- References
- 0
- FWCI
- 22.26
- Type
- journal article
- Language
- en
- Open access
- closed
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- Salt, D. E., Prince, R. C., Baker, A. J. M., Raskin, I., & Pickering, I. J. (1999). Zinc Ligands in the Metal Hyperaccumulator Thlaspi caerulescens As Determined Using X-ray Absorption Spectroscopy. Environmental Science & Technology. https://doi.org/10.1021/es980825x
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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