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Regulation of flavonoid biosynthesis pathway by a single or dual short-term CO2 treatment in black table grapes stored at low temperature

AuthorsRomero, Irene ; Domínguez, Irene ; Morales-Diaz, Noemia; Escribano, M. Isabel ; Merodio, Carmen ; Sánchez Ballesta, M. Teresa
Issue Date2020
CitationPlant Physiology and Biochemistry 156: 30-38 (2020)
AbstractThe application of one or two short-term treatments with high levels of CO2 during 3 days at 0 °C maintained the quality of Autumn Royal table grapes (Vitis vinifera) during storage at 0 °C. We have analyzed how the application of a 3-day gaseous treatment, for one or two times at 0 °C, influences on common (VviPAL, VviCHS, VviCHI, VviF3′H, VviF3′5′H, VviF3H and VviLDOX) and branch-specific (VviFLS1, VviLAR1, VviLAR2, VviANR and VviUFGT) flavonoid gene expression in the skin of Autumn Royal table grapes. Likewise, the content of flavonols, flavan-3-ols and anthocyanins were identified with Q-TOF equipment and quantified by HPLC-quadrupole together with the total phenolic content and the antioxidant capacity by the ABTS and FRAP methods. Moreover, we have also used a solid-state voltammetry methodology to compare the effect of the application of one or two gaseous treatments in the skin of table grapes stored at 0 °C. Results revealed that the application of one or two gaseous treatments modulated the expression of flavonoid gene expression and the levels of catechin, in the case of one application, or quercetin-3-glucoside and five anthocyanins in fruit treated twice, maintaining their levels after 28 days of storage at 0 °C similar to those recorded in freshly harvested fruit. Satisfactorily, the electrochemical approach was useful to distinguish between treated and non-treated samples not only in the first stage of storage but also after 16 days.
Publisher version (URL)https://doi.org/10.1016/j.plaphy.2020.08.047
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