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

F J Cuevas; J M Moreno-Rojas; F Arroyo; A Daza; M J Ruiz-Moreno

doi:10.1016/j.foodchem.2015.12.049

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

Food Chem. 2016 May 15:199:479-84. doi: 10.1016/j.foodchem.2015.12.049. Epub 2015 Dec 10.

Authors

F J Cuevas¹, J M Moreno-Rojas², F Arroyo³, A Daza³, M J Ruiz-Moreno¹

Affiliations

¹ Postharvest Technology and Agrifood Industry Area, Andalusian Institute of Agricultural and Fishering Research and Training (IFAPA) Alameda del Obispo, Córdoba, Spain.
² 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.
³ Organic Production and Natural Resources, Andalusian Institute of Agricultural and Fishering Research and Training (IFAPA) Las Torres-Tomejil, Seville, Spain.

PMID: 26775998
DOI: 10.1016/j.foodchem.2015.12.049

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).

Keywords: Chemometrics; Organic cultivation; Prunus salicina; SPME–GC–MS; Volatile compounds.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Discriminant Analysis
Fruit / chemistry*
Fruit / classification*
Gas Chromatography-Mass Spectrometry / methods*
Prunus domestica / chemistry*
Prunus domestica / classification*
Volatile Organic Compounds

Substances

Volatile Organic Compounds