Changes in esterified pectins during development in the flax stems and leaves
| Autor: | Josiane Courtois, B. Courtois, L. Bédouet, E. Denys |
|---|---|
| Přispěvatelé: | Biologie des organismes marins et écosystèmes (BOME), Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Muséum national d'Histoire naturelle (MNHN), Muséum national d'Histoire naturelle (MNHN)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2006 |
| Předmět: |
0106 biological sciences
animal structures food.ingredient Polymers and Plastics Pectin macromolecular substances Xylose Polysaccharide complex mixtures 01 natural sciences MESH: Methylation 03 medical and health sciences chemistry.chemical_compound food Arabinogalactan Botany Materials Chemistry MESH: Rhamnogalacturonan [SDV.BBM]Life Sciences [q-bio]/Biochemistry Molecular Biology Hemicellulose Sugar MESH: Flax 030304 developmental biology chemistry.chemical_classification 0303 health sciences biology Chemistry MESH: Linun usitatissimum L Linaceae digestive oral and skin physiology Organic Chemistry food and beverages MESH: NMR biology.organism_classification Horticulture Dormancy MESH: Homogalacturonan MESH: Acetylation MESH: Pectins 010606 plant biology & botany |
| Zdroj: | Carbohydrate Polymers Carbohydrate Polymers, Elsevier, 2006, 65 (2), pp.165-173 Carbohydrate Polymers, 2006, 65 (2), pp.165-173 |
| ISSN: | 0144-8617 |
| DOI: | 10.1016/j.carbpol.2005.12.041 |
| Popis: | International audience; Winter oil flax species (Linun usitatissimum L) seedlings were harvested along the development at the dormancy, elongation, maturation and senescence periods, and pectins in stems and leaves were extracted in acid and analysed. The monosaccharides analyses indicated presence of the specific sugar of pectins in the extracts. Co-extraction of arabinogalactan polysaccharides with pectins was possible whereas extraction of hemicellulose material seemed unlikely in regard to the absence of xylose and fucose. The yields of pectins extraction from the stems changed over time and decreased along the development, 7% at the dormancy stage and 2% at senescence, whereas the leaves led to constant yields of pectins over ageing (w4%). In the stems, pectins incorporated galacturonic acid as maturation process, from 53% at dormancy to 66% during senescence. In the leaves, the pectins appeared more acidic than in the stems, and changes along development in composition and size were not significant. During development, methylation of acid-soluble pectins was high (80–100%) and varied moderately, whereas the degree of acetylation was important (23–40%) and increased slightly. Globally, modifications of pectins from leaves were more limited compare to stems, and mild acid extraction indicated that high molecular weight esterified pectins are present or still synthesised in flax until senescence. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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