RT journal article
T1 A GC–MS untargeted metabolomics approach for the classification of chemical differences in grape juices based on fungal pathogen
A1 Schueuermann, Claudia
A1 Steel, Christopher C.
A1 Blackman, John W.
A1 Clark, Andrew C.
A1 Schwarz, Lachlan J.
A1 Moraga Galindo, Javier
A1 González Collado, Isidro
A1 Schmidtke, Leigh M.
A2 Química Orgánica
K1 Volatile
K1 Metabolite
K1 2-pentylfuran
K1 eremophilen
K1 bunch rot
K1 dimethyltetralin
K1 quality
K1 benzaldehyde
AB Fungal bunch rot of grapes leads to production of detrimental flavour compounds, some of which are well characterised but others remain unidentified. The current study uses an untargeted metabolomics approach to classify volatile profiles of grape juices based on the presence of different fungal pathogens. Individual grape berries were inoculated with Botrytis cinerea, Penicillium expansum, Aspergillus niger or A. carbonarius. Grape bunches were inoculated and blended with healthy fruit, to provide 10% (w/w) infected juice. Juices from the above sample batches were analysed by GC/MS. PLS-DA of the normalised summed mass ions indicated sample classification according to pathogen. Compounds identified from those mass ion matrices that had high discriminative value for classification included 1,5-dimethylnaphthalene and several unidentified sesquiterpenes that were relatively higher in B. cinerea infected samples. A. niger and A. carbonarius samples were relatively higher in 2-(4-hexyl-2,5-dioxo-2,5-dihydrofuran-3-yl)acetic acid, while P. expansum samples were higher in γ-nonalactone and m-cresol.
PB ELSEVIER
SN 1873-7072
YR 2019
FD 2019-01-01
LK http://hdl.handle.net/10498/34517
UL http://hdl.handle.net/10498/34517
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 06-nov-2026