Variation in secondary metabolites in a unique set of tomato accessions collected in Turkey. (1st July 2020)

• Record Type: Journal Article
• Authors: Bakir, Sena; Capanoglu, Esra; Hall, Robert D.; de Vos, Ric C.H.
• Is Part Of: Food chemistry. Volume 317(2020)
• Publication Date: 2020-07-01
• Subjects: LC-MS grade methanol (Pubchem CID: 887) -- Acetonitrile (Pubchem CID: 6342) -- Formic acid (Pubchem CID: 284) provided by Merck (Frankfurter, Germany); Tomato -- Semi-polar phytochemicals -- Metabolomics -- Multivariate analysis; Food -- Analysis -- Periodicals; Food -- Composition -- Periodicals; 664
• DOI: 10.1016/j.foodchem.2020.126406
• Languages: English
• ISSNs: 0308-8146

Abstract

Highlights: A unique set of 50 tomato landraces from Turkey have been chemically characterized for the first time. Metabolite profiles of tomatoes were mostly correlated with fruit size. Geographical origin of the seed did not have a significant effect on metabolite profile. New chemicals co-correlating with known non-smoky components have been identified. Data from targeted and non-targeted analyses showed similar results. Abstract: In this study, 50 tomato landraces grown in Turkey were investigated in terms of their secondary metabolite profiles. Each accession was planted in 2016 and 2017 in 3 replicates in an open field. In this study, color, pH and brix of the fruit samples were measured and an unbiased LCMS-based metabolomics approach was applied. Based on Principal Components Analysis (PCA) and Hierarchical Cluster Analysis (HCA) of the relative abundance levels of >250 metabolites, it could be concluded that fruit size was the most influential to the biochemical composition, rather than the geographical origin of accessions. Results indicated substantial biodiversity in various metabolites generally regarded as key to fruit quality aspects, including sugars; phenolic compounds like phenylpropanoids and flavonoids; alkaloids and glycosides of flavour-related volatile compounds. The phytochemical data provides insight into which Turkish accessions might be most promising as starting materials for the tomato processing and breeding industries.