Isolation of C-glycosyl Xanthones from Coffea pseudozanguebariae and their location

Talamond Pascale, Conejero Geneviève, Verdeil Jean-Luc, Poëssel Jean-Luc. 2011. Isolation of C-glycosyl Xanthones from Coffea pseudozanguebariae and their location. Natural Product Communications, 6 (12) : 1885-1888.

Quartile : Q2, Sujet : FOOD SCIENCE & TECHNOLOGY / Quartile : Q4, Sujet : CHEMISTRY, MEDICINAL

Résumé : The biochemical composition of leaves from Coffea pseudozanguebariae, a wild caffeine-free coffee species, was determined. Two phenolic compounds were extracted from leaves, separated and characterized. Their structures were elucidated by mass spectrometry, and 1 D and 2D NMR spectroscopy and were shown to be mangiferin (1) and isomangiferin (2), which were the main polyphenol products. Multiphoton fluorescence imaging was performed to visualize polyphenol distribution in leaf cross sections. Consistent biochemical analysis cell imaging techniques on leaves revealed yellow fluorescence in the epidermis and parenchyma cells corresponding to xanthone compounds.

Mots-clés Agrovoc : Coffea, composition chimique, composé phénolique, feuille, plante sauvage, Coffea canephora, caféine, fluorescence, spectrométrie de masse, spectroscopie RMN

Mots-clés géographiques Agrovoc : France

Mots-clés complémentaires : Coffea pseudozanguebariae

Classification Agris : F60 - Physiologie et biochimie végétale
U30 - Méthodes de recherche
Q04 - Composition des produits alimentaires

Champ stratégique Cirad : Axe 3 (2005-2013) - Alimentation accessible et de qualité

Auteurs et affiliations

• Talamond Pascale, ISEM (FRA)
• Conejero Geneviève, INRA (FRA)
• Verdeil Jean-Luc, CIRAD-BIOS-UMR AGAP (FRA)
• Poëssel Jean-Luc, INRA (FRA)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/578945/)

Métriques

[ Page générée et mise en cache le 2024-11-25 ]