Issue 18, 2023

Synergic photoprotection of phenolic compounds present in tomato fruit cuticle: a spectroscopic investigation in solution

Abstract

Coumaric acids and flavonoids play pivotal roles in protecting plants against ultraviolet radiation (UVR) exposure. In this work, we focus our photoprotection studies on p-coumaric acid and the flavonoid naringenin chalcone. Photoprotection is well-understood in p-coumaric acid; in contrast, information surrounding photoprotection in naringenin chalcone is lacking. Additionally, and vitally, how these two species work in unison to provide photoprotection across the UV-B and UV-A is unknown. Herein, we employ transient absorption spectroscopy together with steady-state irradiation studies to unravel the photoprotection mechanism of a solution of p-coumaric acid and naringenin chalcone. We find that the excited state dynamics of p-coumaric acid are significantly altered in the presence of naringenin chalcone. This finding concurs with quenching of the p-coumaric acid fluorescence with increasing concentration of naringenin chalcone. We propose a Förster energy transfer mechanism is operative via the formation of dipole–dipole interactions between p-coumaric acid and naringenin chalcone. To our knowledge, this is the first demonstration in plants of a synergic effect between two classes of phenolics to bypass the potentially damaging effects of UVR.

Graphical abstract: Synergic photoprotection of phenolic compounds present in tomato fruit cuticle: a spectroscopic investigation in solution

Supplementary files

Article information

Article type
Paper
Submitted
08 Feb 2023
Accepted
06 Apr 2023
First published
11 Apr 2023
This article is Open Access
Creative Commons BY-NC license

Phys. Chem. Chem. Phys., 2023,25, 12791-12799

Synergic photoprotection of phenolic compounds present in tomato fruit cuticle: a spectroscopic investigation in solution

A. González Moreno, J. M. Woolley, E. Domínguez, A. de Cózar, A. Heredia and V. G. Stavros, Phys. Chem. Chem. Phys., 2023, 25, 12791 DOI: 10.1039/D3CP00630A

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