Journal
FOOD CHEMISTRY
Volume 217, Issue -, Pages 1-8Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2016.08.039
Keywords
Flaxseed; Seed development; NMR; HPLC-UV; Lignan macromolecule; Phenolics
Funding
- Conseil Regional de Picardie
- European Regional Development Fund (ERDF)
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The main flax lignan, secoisolariciresinol diglucoside, is stored in a macromolecule containing other ester-bound phenolic compounds. In this study, NMR and HPLC-UV analyses were performed on flax-seeds harvested at different developmental stages to identify and quantify the main phenolic compounds produced during seed development. Extraction was carried out with or without alkaline hydrolysis to determine if these molecules accumulate in the lignan macromolecule and/or in a free form. Monolignol glucosides accumulate in a free form up to 9.85 mg/g dry matter at the early developmental stages. Hydroxycinnamic acid glucosides and flavonoid accumulate (up to 3.18 and 4.07 mg/g dry matter, respectively) in the later developmental stages and are ester-bound in the lignan macromolecule. Secosiolariciresinol diglucoside accumulates (up to 28.65 mg/g dry matter) in the later developmental stages in both forms, mainly ester-bound in the lignan macromolecule and slightly in a free form. (C) 2016 Elsevier Ltd. All rights reserved.
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