Journal Article

DESY-2013-00886

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Pattern of iron distribution in maternal and filial tissues in wheat grains with contrasting levels of iron

Singh, S. P. (Corresponding author) ; Vogel-Mikus, K.Extern* ; Arcon, I.Extern* ; Vavpetic, P. ; Jeromel, L. ; Pelicon, P. ; Kumar, J.Extern* ; Tuli, R.

2013
Univ. Press Oxford

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Please use a persistent id in citations: doi:10.1093/jxb/ert160

Abstract: Iron insufficiency is a worldwide problem in human diets. In cereals like wheat, the bran layer of the grains is an important source of iron. However, the dietary availability of iron in wheat flour is limited due to the loss of the iron-rich bran during milling and processing and the presence of anti-nutrients like phytic acid that keep iron strongly chelated in the grain. The present study investigated the localization of iron and phosphorus in grain tissues of wheat genotypes with contrasting grain iron content using synchrotron-based micro-X-ray fluorescence (micro-XRF) and micro-protoninduced X-ray emission (micro-PIXE). X-ray absorption near-edge spectroscopy (XANES) was employed to determinethe proportion of divalent and trivalent forms of Fe in the grains. It revealed the abundance of oxygen, phosphorus, and sulphur in the local chemical environment of Fe in grains, as Fe-O-P-R and Fe-O-S-R coordination. Contrasting differences were noticed in tissue-specific relative localization of Fe, P, and S among the different genotypes, suggesting a possible effect of localization pattern on iron bioavailability. The current study reports the shift in iron distribution from maternal to filial tissues of grains during the evolution of wheat from its wild relatives to the present-day cultivated varieties, and thus suggests the value of detailed physical localization studies in varietal improvement programmes for food crops.

Note: (c) The Author. Open Access.

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Contributing Institute(s):

1. DOOR-User (DOOR)

Research Program(s):

1. DORIS Beamline C (POF2-54G13) (POF2-54G13)
2. FS-Proposal: I-20110511 EC (I-20110511-EC) (I-20110511-EC)
3. CALIPSO - Coordinated Access to Lightsources to Promote Standards and Optimization (312284) (312284)

Experiment(s):

1. DORIS Beamline C (DORIS III)

Appears in the scientific report 2013

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Database coverage:
; ; Allianz-Lizenz / DFG ; BIOSIS Previews ; Current Contents - Agriculture, Biology and Environmental Sciences ; Current Contents - Life Sciences ; JCR ; NCBI Molecular Biology Database ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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