| Title: | Cadmium associates with oxalate in calcium oxalate crystals and competes with calcium for translocation to stems in the cadmium bioindicator Gomphrena claussenii |
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| Authors: | ID Pongrac, Paula, Biotechnical Faculty, University of Ljubljana (Author)
ID Serra, Tania, Laboratory of Genetics, Wageningen University and Research (Author)
ID Castillo Michel, Hiram, European Synchrotron Radiation Facility, Grenoble (Author)
ID Vogel-Mikuš, Katarina, Biotechnical Faculty, University of Ljubljana (Author)
ID Arčon, Iztok, UNG (Author)
ID Klemen, Mitja, Jozef Stefan Institute (Author)
ID Jencic, Boštjan, Jozef Stefan Institute (Author)
ID Kavčič, Anja, Biotechnical Faculty, University of Ljubljana (Author)
ID Villafort Carvalho, Mina T., Laboratory of Genetics, Wageningen University and Research (Author)
ID Aarts, Mark G. M., Laboratory of Genetics, Wageningen University and Research (Author) |
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| Files: |
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| Language: | English |
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| Work type: | Not categorized |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | UNG - University of Nova Gorica
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| Abstract: | Cadmium (Cd) was shown to co-localise with calcium (Ca) in oxalate crystals in the stems and leaves of
Cd tolerant Gomphrena claussenii, but Cd binding remained unresolved. Using synchrotron radiation
X-ray absorption near edge spectroscopy we demonstrate that in oxalate crystals of hydroponically
grown G. claussenii the vast majority of Cd is bound to oxygen ligands in oxalate crystals (488%;
Cd–O–C coordination) and the remaining Cd is bound to sulphur ligands (Cd–S–C coordination). Cadmium
binding to oxalate does not depend on the amount of Ca supplied or from which organs the crystals
originate (stems and mature leaves). By contrast, roots contain no oxalate crystals and therein Cd is
bound predominantly by S ligands. The potential to remove Cd by extraction of Cd-rich oxalate crystals
from plant material should be tested in phytoextraction or phytomining strategies. |
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| Keywords: | Cd XANES, Cd oxalate, Gomphrena claussenii |
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| Publication version: | Version of Record |
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| Year of publishing: | 2018 |
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| Number of pages: | 9 |
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| Numbering: | 1 |
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| PID: | 20.500.12556/RUNG-4057-fc131a59-1c4b-ab1a-6725-d52e8d48c4a0 |
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| COBISS.SI-ID: | 4794703 |
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| DOI: | 10.1039/c8mt00149a |
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| NUK URN: | URN:SI:UNG:REP:HDHBVERC |
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| Publication date in RUNG: | 06.09.2018 |
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| Views: | 4161 |
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| Downloads: | 0 |
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