Wiggenhauser, Matthias; Bigalke, Moritz; Imseng, Martin; Keller, Anita; Archer, Corey; Wilcke, Wolfgang; Frossard, Emmanuel (2018). Zinc isotope fractionation during grain filling of wheat and a comparison of zinc and cadmium isotope ratios in identical soil-plant systems. New Phytologist, 219(1), pp. 195-205. Wiley-Blackwell 10.1111/nph.15146
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Remobilization of Zn from shoot to grain contributes significantly to Zn
grain concentrations and thereby to food quality. On the other hand,
strong accumulation of Cd in grain is detrimental for food quality.
Zn concentrations and isotope ratios were measured in wheat shoots
(Triticum aestivum L.) at different growth stages to elucidate Zn
pathways and processes in the shoot during grain filling.
Zinc mass significantly decreased while heavy Zn isotopes accumulated
in straw during grain filling (Δ66Znfullmaturity-flowering = 0.21 to 0.31 ‰).
Three quarters of the Zn mass in the shoot moved to the grains, which
were enriched in light Zn isotopes relative to the straw (Δ66Zngrain-straw
-0.21 to -0.31 ‰).
Light Zn isotopes accumulated in phloem sinks while heavy isotopes
were retained in phloem sources likely because of apoplastic retention
and compartmentalization. Unlike for Zn, an accumulation of heavy Cd
isotopes in grains has previously been shown. The opposing isotope
fractionation of Zn and Cd might be caused by distinct affinities of Zn
and Cd to O, N and S ligands. Thus, combined Zn and Cd isotope
analysis provides a novel tool to study biochemical processes that
separate these elements in plants.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
08 Faculty of Science > Institute of Geography 08 Faculty of Science > Institute of Geography > Physical Geography > Unit Soil Science |
UniBE Contributor: |
Bigalke, Moritz |
Subjects: |
900 History > 910 Geography & travel |
ISSN: |
0028-646X |
Publisher: |
Wiley-Blackwell |
Language: |
English |
Submitter: |
Moritz Bigalke |
Date Deposited: |
24 May 2018 11:54 |
Last Modified: |
05 Dec 2022 15:14 |
Publisher DOI: |
10.1111/nph.15146 |
BORIS DOI: |
10.7892/boris.116616 |
URI: |
https://boris.unibe.ch/id/eprint/116616 |
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