title: Changes in phospholipid composition, protein content and chemical properties of flaxseed oil during development.
abstract: The aim of the present research is to investigate the effect of harvest date on the composition of flaxseed. Samples were collected at regular intervals from 7 to 56 days after flowering (DAF) and analyzed for phospholipid composition, storage protein content and chemical properties. Phospholipid (PL) percentage of the total lipid decreased from 32.72% on the 7th DAF to 2.55% on the 56th DAF. The most phospholipids present in flaxseed were phosphatidylinositol (PI), phosphatidylethanolamine (PE) and lysophosphatidylcholine (LPC) which were highly unsaturated and rich in linolenic and linoleic acids, comprising together 60% of the total fatty acids. Chemical investigation of flaxseed oil showed overall a decrease in UV absorbance (K(232) and K(270)), acid value, free fatty acid content and an increase in peroxide value and storage protein content with development. At full maturity, flaxseed contained 29% proteins on a dry weight basis (DW %).
authors.affiliation: Laboratoire de Biochimie des Lipides, Département de Biologie, Faculté des Sciences de Tunis, 2092 ELmanar, Tunisia. wahid1bio@yahoo.fr
authors.forename: Wahid
authors.initials: W
authors.lastname: Herchi
authors.forename: Intidhar
authors.initials: I
authors.lastname: Bouali
authors.forename: Saleh
authors.initials: S
authors.lastname: Bahashwan
authors.forename: Sophie
authors.initials: S
authors.lastname: Rochut
authors.forename: Sadok
authors.initials: S
authors.lastname: Boukhchina
authors.forename: Habib
authors.initials: H
authors.lastname: Kallel
authors.forename: Claude
authors.initials: C
authors.lastname: Pepe
mesh_terms: D000383:Agriculture / Q000379:methods*; D005227:Fatty Acids / Q000378:metabolism*; D019597:Flax / Q000254:growth & development / Q000378:metabolism*; D008043:Linseed Oil / Q000737:chemistry / Q000378:metabolism*; D010545:Peroxides / Q000378:metabolism; D010743:Phospholipids / Q000737:chemistry / Q000378:metabolism*; D010940:Plant Proteins / Q000378:metabolism*; D012639:Seeds / Q000254:growth & development / Q000378:metabolism*; D014466:Ultraviolet Rays
chemical_list: D005227:Fatty Acids; D010545:Peroxides; D010743:Phospholipids; D010940:Plant Proteins; D008043:Linseed Oil