title: Effect of management (organic vs conventional) on volatile profiles of six plum cultivars (Prunus salicina Lindl.). A chemometric approach for varietal classification and determination of potential markers.
abstract: The volatile profiles of six plum cultivars ('Laetitia', 'Primetime', 'Sapphire', 'Showtime', 'Songold' and 'Souvenir') produced under two management systems (conventional and organic) and harvested in two consecutive years were obtained by HS-SPME-GC-MS. Twenty-five metabolites were determined, five of which (pentanal, (E)-2-heptenal, 1-octanol, eucalyptol and 2-pentylfuran) are reported for the first time in Prunus salicina Lindl. Hexanal stood out as a major volatile compound affected by the management system. In addition, partial least square discriminant analysis (PLS-DA) achieved an effective classification of genotypes based on their volatile profiles. A high classification accuracy model was obtained with a sensitivity of 97.9% and a specificity of 99.6%. Furthermore, the application of a dual criterion, based on a method of variable selection, VIP (variable importance in projection) and the results of a univariate analysis (ANOVA), allowed the identification of potential volatile markers in 'Primetime', 'Showtime' and 'Souvenir' genotypes (cultivars not characterised to date).
authors.affiliation: Postharvest Technology and Agrifood Industry Area, Andalusian Institute of Agricultural and Fishering Research and Training (IFAPA) Alameda del Obispo, Córdoba, Spain.
authors.forename: F J
authors.initials: FJ
authors.lastname: Cuevas
authors.affiliation: Postharvest Technology and Agrifood Industry Area, Andalusian Institute of Agricultural and Fishering Research and Training (IFAPA) Alameda del Obispo, Córdoba, Spain. Electronic address: josem.moreno.rojas@juntadeandalucia.es.
authors.forename: J M
authors.initials: JM
authors.lastname: Moreno-Rojas
authors.affiliation: Organic Production and Natural Resources, Andalusian Institute of Agricultural and Fishering Research and Training (IFAPA) Las Torres-Tomejil, Seville, Spain.
authors.forename: F
authors.initials: F
authors.lastname: Arroyo
authors.affiliation: Organic Production and Natural Resources, Andalusian Institute of Agricultural and Fishering Research and Training (IFAPA) Las Torres-Tomejil, Seville, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Daza
authors.affiliation: Postharvest Technology and Agrifood Industry Area, Andalusian Institute of Agricultural and Fishering Research and Training (IFAPA) Alameda del Obispo, Córdoba, Spain.
authors.forename: M J
authors.initials: MJ
authors.lastname: Ruiz-Moreno
mesh_terms: D016002:Discriminant Analysis; D005638:Fruit / Q000737:chemistry* / Q000145:classification*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D000068242:Prunus domestica / Q000737:chemistry* / Q000145:classification*; D055549:Volatile Organic Compounds
chemical_list: D055549:Volatile Organic Compounds
keywords: Chemometrics; Organic cultivation; Prunus salicina; SPME–GC–MS; Volatile compounds