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Spatially resolved analysis of variation in barley (Hordeum vulgare) grain micronutrient accumulation

Title data

Detterbeck, Amelie ; Pongrac, Paula ; Rensch, Stefan ; Reuscher, Stefan ; Pečovnik, Matic ; Vavpetič, Primož ; Pelicon, Primož ; Holzheu, Stefan ; Krämer, Ute ; Clemens, Stephan:
Spatially resolved analysis of variation in barley (Hordeum vulgare) grain micronutrient accumulation.
In: New Phytologist. Vol. 211 (September 2016) Issue 4 . - pp. 1241-1254.
ISSN 1469-8137
DOI: https://doi.org/10.1111/nph.13987

Project information

Project financing: Alexander von Humboldt-Stiftung
6. EU-Rahmenprogramm

Abstract in another language

Genetic biofortification requires knowledge on natural variation and underlying mechanisms of micronutrient accumulation. We therefore studied diversity in grain micronutrient concentrations and spatial distribution in barley (Hordeum vulgare), a genetically tractable model cereal and an important crop with widespread cultivation.We assembled a diverse collection of barley cultivars and landraces and analysed grain micronutrient profiles in genebank material and after three independent cultivations. Lines with contrasting grain Zn accumulation were selected for in-depth analysis of micronutrient distribution within the grain by micro-particle-induced X-ray emission (µ-PIXE). Also, we addressed association with grain Cd accumulation. The analysis of more than 120 lines revealed substantial variation especially in grain Zn concentrations. A large fraction of this variation is due to genetic differences. Grain dissection and µ-PIXE analysis of contrasting lines showed that differences in grain Zn accumulation apply to all parts of the grain including the endosperm. Cd concentrations exceeded the Codex Alimentarius threshold in most of the representative barley lines after cultivation in a slightly Cd-contaminated agricultural soil. Two important conclusions for biofortification are: first, high Zn grains contain more Zn also in the consumed parts of the grain; second, higher micronutrient concentrations are strongly associated with higher Cd accumulation.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER135230
Keywords: natural variation; biofortification; metal; grain; barley (Hordeum vulgare); micronutrient accumulation; micro-proton-induced X-ray emission (μ-PIXE)
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Plant Physiology
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Plant Physiology > Chair Plant Physiology - Univ.-Prof. Dr. Stephan Clemens
Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology
Result of work at the UBT: Yes
DDC Subjects: 500 Science
500 Science > 570 Life sciences, biology
500 Science > 580 Plants (Botany)
Date Deposited: 10 Aug 2016 07:58
Last Modified: 10 Jan 2018 10:02
URI: https://eref.uni-bayreuth.de/id/eprint/33869