A Role for Differential Glycoconjugation in the Emission of Phenylpropanoid Volatiles from Tomato Fruit Discovered Using a Metabolic Data Fusion Approach

Author:

Tikunov Yury M.1,de Vos Ric C.H.1,Gonzaݩlez Paramaݩs Ana M.1,Hall Robert D.1,Bovy Arnaud G.1

Affiliation:

1. Centre for BioSystems Genomics, 6700 AB Wageningen, The Netherlands (Y.M.T., R.C.H.d.V., A.M.G.P., R.D.H., A.G.B.); Plant Research International, 6700 AA Wageningen, The Netherlands (Y.M.T., R.C.H.d.V., R.D.H., A.G.B.); Laboratory for Plant Physiology, Wageningen University, 6703 BD Wageningen, The Netherlands (Y.M.T.); and Universidad de Salamanca, Area de Nutricioݩn y Bromatologiݩa, Facultad de

Abstract

Abstract A role for differential glycoconjugation in the emission of phenylpropanoid volatiles from ripening tomato fruit (Solanum lycopersicum) upon fruit tissue disruption has been discovered in this study. Application of a multiinstrumental analytical platform for metabolic profiling of fruits from a diverse collection of tomato cultivars revealed that emission of three discriminatory phenylpropanoid volatiles, namely methyl salicylate, guaiacol, and eugenol, took place upon disruption of fruit tissue through cleavage of the corresponding glycoconjugates, identified putatively as hexose-pentosides. However, in certain genotypes, phenylpropanoid volatile emission was arrested due to the corresponding hexose-pentoside precursors having been converted into glycoconjugate species of a higher complexity: dihexose-pentosides and malonyl-dihexose-pentosides. This glycoside conversion was established to occur in tomato fruit during the later phases of fruit ripening and has consequently led to the inability of red fruits of these genotypes to emit key phenylpropanoid volatiles upon fruit tissue disruption. This principle of volatile emission regulation can pave the way to new strategies for controlling tomato fruit flavor and taste.

Publisher

Oxford University Press (OUP)

Subject

Plant Science,Genetics,Physiology

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