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Title:Cadmium associates with oxalate in calcium oxalate crystals and competes with calcium for translocation to stems in the cadmium bioindicator Gomphrena claussenii
Authors:Pongrac, Paula (Author)
Serra, Tania (Author)
Castillo Michel, Hiram (Author)
Vogel-Mikuš, Katarina (Author)
Arčon, Iztok (Author)
Klemen, Mitja (Author)
Jencic, Boštjan (Author)
Kavčič, Anja (Author)
Villafort Carvalho, Mina T. (Author)
Aarts, Mark G. M. (Author)
Files:This document has no files. This document may have a phisical copy in the library of the organization, check the status via COBISS. Link is opened in a new window
Language:English
Work type:Not categorized (r6)
Tipology:1.01 - Original Scientific Article
Organization:UNG - University of Nova Gorica
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.
Keywords:Cd XANES, Cd oxalate, Gomphrena claussenii
Year of publishing:2018
Number of pages:9
Numbering:1
COBISS_ID:4794703 Link is opened in a new window
URN:URN:SI:UNG:REP:HDHBVERC
DOI:10.1039/c8mt00149a Link is opened in a new window
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Record is a part of a journal

Title:Metallomics
Publisher:Royal Society of Chemistry
ISSN:1756-5901
Year of publishing:2018

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