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Plant and Soil

, Volume 325, Issue 1–2, pp 15–24 | Cite as

Iron transport, deposition and bioavailability in the wheat and barley grain

  • Søren BorgEmail author
  • Henrik Brinch-Pedersen
  • Birgitte Tauris
  • Preben B. Holm
Regular Article

Abstract

In recent years, the increasing knowledge on the molecular mechanisms underlying mineral uptake, transport, homeostasis and deposition within plants, has paved the way for a more targeted approach to improving the nutrient status of crop plants based on biotechnology. In the present paper we will briefly review existing knowledge on the distribution and transport pathways of iron in the two small grained cereals, barley and wheat, and focus on the efforts made to increase the iron content in cereals in general. However, mineral content is not the only factor of relevance for improving the nutritional status of poor populations. It is thus well documented that a number of plant components can act either as promoters or inhibitors of mineral uptake in the human digestive system (Frossard et al. J Sci Food Agric 80, 817-879 2000; Brinch-Pedersen et al. J Cereal Sci 46, 308-326 2007). The nutritional impact of increasing mineral content accordingly has to be seen in the context of mineral bioavailability. Finally, we will briefly report on recent data from barley, where laser capture microdissection of the different grain tissues combined with gene expression profiling has provided some insight into metal transport and deposition (Tauris et al. 2009). In the present paper we will provide a tentative and preliminary roadmap for iron trafficking in the barley grain.

Keywords

Biofortification Iron nutrition Cereals Wheat Barley Grain development HarvestPlus Iron transporters 

Notes

Acknowledgements

We are indebted to HarvestPlus for financial support to undertake this study. The laser capture work was supported by the Danish Research Council for Technology and Production Sciences. The technical assistance of Lis B. Holte and Ole Braad Thomsen is gratefully acknowledged.

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Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  • Søren Borg
    • 1
    Email author
  • Henrik Brinch-Pedersen
    • 1
  • Birgitte Tauris
    • 1
  • Preben B. Holm
    • 1
  1. 1.Faculty of Agricultural Sciences, Department of Genetics and BiotechnologyAarhus UniversitySlagelseDenmark

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