title: Determination and imaging of metabolites from Vitis vinifera leaves by laser desorption/ionisation time-of-flight mass spectrometry.
abstract: Analysis of grapevine phytoalexins at the surface of Vitis vinifera leaves has been achieved by laser desorption/ionisation time-of-flight mass spectrometry (LDI-ToFMS) without matrix deposition. This simple and rapid sampling method was successfully applied to map small organic compounds at the surface of grapevine leaves. It was also demonstrated that the laser wavelength is a highly critical parameter. Both 266 and 337 nm laser wavelengths were used but the 266 nm wavelength gave increased spatial resolution and better sensitivity for the detection of the targeted metabolites (resveratrol and linked stilbene compounds). Mass spectrometry imaging of grapevine Cabernet Sauvignon leaves revealed specific locations with respect to Plasmopara viticola pathogen infection or light illumination.
authors.affiliation: Laboratoire de Spectrométrie de Masse et de Chimie Laser, Institut Jean Barriol-Fédération de Recherche 2843, Université Paul Verlaine-Metz, 1 Boulevard Arago, 57078 Metz technopole Cedex 03, France.
authors.forename: Gregory
authors.initials: G
authors.lastname: Hamm
authors.forename: Vincent
authors.initials: V
authors.lastname: Carré
authors.forename: Anne
authors.initials: A
authors.lastname: Poutaraud
authors.forename: Benoît
authors.initials: B
authors.lastname: Maunit
authors.forename: Gilles
authors.initials: G
authors.lastname: Frache
authors.forename: Didier
authors.initials: D
authors.lastname: Merdinoglu
authors.forename: Jean-François
authors.initials: JF
authors.lastname: Muller
mesh_terms: D018515:Plant Leaves / Q000737:chemistry* / Q000378:metabolism; D000077185:Resveratrol; D012680:Sensitivity and Specificity; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization / Q000379:methods*; D013267:Stilbenes / Q000032:analysis* / Q000378:metabolism; D027843:Vitis / Q000737:chemistry* / Q000378:metabolism
chemical_list: D013267:Stilbenes; C107773:pterostilbene; D000077185:Resveratrol