Localization of alkylresorcinols in wheat,rye and barley kernels |
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Authors: | Rikard Landberg Afaf Kamal-Eldin Marjatta Salmenkallio-Marttila Xavier Rouau Per Åman |
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Institution: | 1. Department of Food Science, Swedish University of Agriculture Science (SLU), Box 7051, S-750 07 Uppsala, Sweden;2. VTT Biotechnology, Box 1500, FIN-02044 VTT Helsinki, Finland;3. INRA-UMR Ingénierie des Agropolymères et Technologies Emergentes, INRA-ENSAM-UMII-CIRAD, 2 place Viala, F-34060 Montpellier, France |
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Abstract: | Cereal alkylresorcinols (AR), a group of phenolic lipids mainly found in the outer parts of wheat and rye kernels, are currently being studied for the possibility to use them as biomarkers for the intake of whole grain wheat and rye foods. In this work, AR were localised in grains by using light microscopy and gas chromatographic analysis of hand-dissected botanical and pearling fractions. GC-analysis of hand-dissected fractions showed that more than 99% of the total AR content was located in an intermediate layer of the caryopsis, including the hyaline layer, testa and inner pericarp. Microscopic examination showed that the outer cuticle of testa/inner cuticle of pericarp was the exact location, and that no AR were found in the endosperm or in the germ, suggesting that AR could be used as a selective marker of testa. |
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Keywords: | Alkylresorcinols Wheat Rye Barley Whole grain Biomarker |
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