title: Influence of harvest maturity and fruit logistics on pineapple (Ananas comosus [L.] Merr.) volatiles assessed by headspace solid phase microextraction and gas chromatography-mass spectrometry (HS-SPME-GC/MS).
abstract: Profiling of volatiles from pineapple fruits was performed at four ripening stages using headspace solid-phase microextraction and gas chromatography-mass spectrometry (HS-SPME-GC/MS). In total, 142 volatiles were detected, of which 132 were identified. Multivariate data analysis was carried out to assess the effect of post-harvest storage on volatiles composition of green-ripe sea-freighted pineapple in comparison to air-freighted fruits harvested at full maturity. The latter fruits were characterised by volatiles described as potent odorants in pineapples, such as δ-octalactone, γ-lactones, 1-(E,Z)-3,5-undecatriene and 1,3,5,8-undecatetraene, as well as various methyl esters. In contrast, post-harvest storage of green-ripe sea-freighted fruits resulted in an increased formation of ethyl esters, acetates, acetoxy esters and alcohols, thus allowing the authentication of sea- and air-freighted pineapples, respectively. Particularly, compounds presumably derived from methyl-branched amino acid catabolism were identified in the fruits at later post-harvest stages. In addition, physicochemical traits were determined to characterise the fruit maturity stages.
authors.affiliation: Institute of Food Science and Biotechnology, Chair Plant Foodstuff Technology, Hohenheim University, Garbenstrasse 25, 70599 Stuttgart, Germany. Electronic address: christof.steingass@uni-hohenheim.de.
authors.forename: Christof B
authors.initials: CB
authors.lastname: Steingass
authors.affiliation: Laboratory of Food Technology, Leuven Food Science and Nutrition Research Centre, Department of Microbial and Molecular Systems, Katholieke Universiteit Leuven, Kasteelpark Arenberg 22 Box 2457, 3001 Heverlee, Belgium.
authors.forename: Tara
authors.initials: T
authors.lastname: Grauwet
authors.affiliation: Institute of Food Science and Biotechnology, Chair Plant Foodstuff Technology, Hohenheim University, Garbenstrasse 25, 70599 Stuttgart, Germany.
authors.forename: Reinhold
authors.initials: R
authors.lastname: Carle
mesh_terms: D031230:Ananas / Q000737:chemistry* / Q000254:growth & development; D005638:Fruit / Q000737:chemistry / Q000254:growth & development*; D008401:Gas Chromatography-Mass Spectrometry; D015394:Molecular Structure; D009812:Odorants / Q000032:analysis; D052617:Solid Phase Microextraction; D055549:Volatile Organic Compounds / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D055549:Volatile Organic Compounds
keywords: Multivariate data analysis; PLS; PLS-DA; Post-harvest amino acid catabolism; Ripening; Volatile compounds