title: Partial structural characterization of pectin cell wall from Argania spinosa leaves.
abstract: The pectin polysaccharides from leaves of Argania spinosa (L.) Skeels, collected from Stidia area in the west coast of northern Algeria, were investigated by using sequential extractions and the resulting fractions were analysed for monosaccharide composition and chemical structure. Water-soluble pectic (ALS-WSP) and chelating-soluble pectic (ALS-CSP) fractions were obtained, de-esterified and fractionated by anion-exchange chromatography and characterized by sugar analysis combined with methylation analysis and (1)H and (13)C NMR spectroscopy. The data reveal the presence of altering homogalacturonan (HG) and rhamnogalacturonan I (RG-I) in both pectin fraction. The rhamnogalacturonan I (RG-I) are consisted of a disaccharide repeating unit [→ α-D-GalpA-1,2-α-L-Rhap-1,4 →] backbone, with side chains contained highly branched α-(1 → 5)-linked arabinan and short linear β-(1 → 4)-linked galactan, attached to O-4 of the rhamnosyl residues.
authors.affiliation: Laboratoire des Productions, Valorisations Végétales et Microbiennes, Département de Biotechnologie, Université des Sciences et de la Technologie d'Oran, BP 1505, El Mnaouar, 31000 Oran, Algeria; Département de Biologie, Faculté des Sciences, Université Docteur Moulay Tahar de Saida, BP 138 cité ENNASR, 20000 Saida, Algeria.
authors.forename: Kadda
authors.initials: K
authors.lastname: Hachem
authors.affiliation: Département de Biologie, Faculté des Sciences, Université Docteur Moulay Tahar de Saida, BP 138 cité ENNASR, 20000 Saida, Algeria.
authors.forename: Yasmina
authors.initials: Y
authors.lastname: Benabdesslem
authors.affiliation: Faculté des Sciences, Université de Djillali Liabès Sidi-Bel-Abbès, BP 89, 22000 Sidi-Bel-Abbés, Algéria.
authors.forename: Samia
authors.initials: S
authors.lastname: Ghomari
authors.affiliation: Département de Biologie, Faculté des Sciences, Université Docteur Moulay Tahar de Saida, BP 138 cité ENNASR, 20000 Saida, Algeria.
authors.forename: Okkacha
authors.initials: O
authors.lastname: Hasnaoui
authors.affiliation: Laboratoire des Productions, Valorisations Végétales et Microbiennes, Département de Biotechnologie, Université des Sciences et de la Technologie d'Oran, BP 1505, El Mnaouar, 31000 Oran, Algeria.
authors.forename: Meriem
authors.initials: M
authors.lastname: Kaid-Harche
keywords: Applied sciences; Biochemistry; Biological sciences; Natural product chemistry; Plant biology