Document Detail


Megapixel imaging of (micro)nutrients in mature barley grains.
MedLine Citation:
PMID:  20819790     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Understanding the accumulation and distribution of essential nutrients in cereals is of primary importance for improving the nutritional quality of this staple food. While recent studies have improved the understanding of micronutrient loading into the barley grain, a detailed characterization of the distribution of micronutrients within the grain is still lacking. High-definition synchrotron X-ray fluorescence was used to investigate the distribution and association of essential elements in barley grain at the micro scale. Micronutrient distribution within the scutellum and the embryo was shown to be highly variable between elements in relation to various morphological features. In the rest of the grain, the distribution of some elements such as Cu and Zn was not limited to the aleurone layer but extended into the endosperm. This pattern of distribution was less marked in the case of Fe and, in particular, Mn. A significant difference in element distribution was also found between the ventral and dorsal part of the grains. The correlation between the elements was not consistent between and within tissues, indicating that the transport and storage of elements is highly regulated. The complexity of the spatial distribution and associations has important implications for improving the nutritional content of cereal crops such as barley.
Authors:
Enzo Lombi; Euan Smith; Thomas H Hansen; David Paterson; Martin D de Jonge; Daryl L Howard; Daniel P Persson; Søren Husted; Chris Ryan; Jan K Schjoerring
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-09-05
Journal Detail:
Title:  Journal of experimental botany     Volume:  62     ISSN:  1460-2431     ISO Abbreviation:  J. Exp. Bot.     Publication Date:  2011 Jan 
Date Detail:
Created Date:  2010-12-01     Completed Date:  2011-03-14     Revised Date:  2013-05-28    
Medline Journal Info:
Nlm Unique ID:  9882906     Medline TA:  J Exp Bot     Country:  England    
Other Details:
Languages:  eng     Pagination:  273-82     Citation Subset:  IM    
Affiliation:
Centre for Environmental Risk Assessment and Remediation, University of South Australia, Building X, Mawson Lakes Campus, Mawson Lakes, South Australia, SA-5095 Australia. enzo.lombi@unisa.edu.au
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MeSH Terms
Descriptor/Qualifier:
Endosperm / chemistry,  metabolism
Hordeum / chemistry*,  embryology,  metabolism*
Micronutrients / analysis,  metabolism*
Spectrometry, X-Ray Emission
Chemical
Reg. No./Substance:
0/Micronutrients
Comments/Corrections

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