Journal article published in Food Research International, volume 98, pp. 68–78.

Authors: Maria Alessandra Paissoni, Susana Río Segade, Simone Giacosa, Fabrizio Torchio, Francesco Cravero, Vasileios Englezos, Kalliopi Rantsiou, Cristian Carboni, Vincenzo Gerbi, Pierre-Louis Teissedre and Luca Rolle.

Abstract

Recently the use of ozone as sanitizing agent has been proposed on winegrapes in order to control mycobiota after harvest. The aim of this work was to investigate possible indirect physico-chemical effects of ozone treatment on berry skin phenolic composition and extractability. Vitis vinifera L. cv Nebbiolo and Barbera, chosen for their different anthocyanin profiles, were post-harvest treated for 24 and 72 h with gaseous ozone (30 μL/L). Skin anthocyanin and flavanol extractability was assessed during maceration (6, 24, 48, 96, 168 and 240 h) using a wine-like solution. In our experimental conditions, ozone did not affect significantly the final extraction yield of anthocyanins (TA), proanthocyanidins (PRO), and flavanols reactive to vanillin (FRV) in Barbera, although TA and FRV extractabilities were higher in control samples than in ozone-treated samples during the first stages of maceration. In Nebbiolo, the final TA extraction yield was positively influenced by the ozone treatment (68.6, 64.2, and 59.9% for 24 h ozone-treated berries, 72 h ozone-treated berries and control samples, respectively). Final PRO and FRV extractability also increased in both ozone-treated samples compared to the control (+ 8.6–9.1% for PRO and + 7.3–11.7% for FRV). No significant differences were found among treatments for individual anthocyanins in both cultivars at the end of maceration. Therefore, the use of ozone as sanitizing agent in red varieties prior to winemaking process can be considered because it did not negatively affect the extractability of skin anthocyanins and flavanols.

Key words anthocyanins; extractability; flavanols; grape post-harvest treatment; ozone

BibTeX entry: click to show

@article{
	2318_1641551,
	url = {https://hdl.handle.net/2318/1641551},
	author = {Paissoni, Maria Alessandra and Río Segade, Susana and Giacosa, Simone and Torchio, Fabrizio and Cravero, Francesco and Englezos, Vasileios and Rantsiou, Kalliopi and Carboni, Cristian and Gerbi, Vincenzo and Teissedre, Pierre-Louis and Rolle, Luca},
	title = {Impact of post-harvest ozone treatments on the skin phenolic extractability of red winegrapes cv Barbera and Nebbiolo (Vitis vinifera L.)},
	year = {2017},
	journal = {Food Research International},
	volume = {98},
	abstract = {Recently the use of ozone as sanitizing agent has been proposed on winegrapes in order to control mycobiota after harvest. The aim of this work was to investigate possible indirect physico-chemical effects of ozone treatment on berry skin phenolic composition and extractability. Vitis vinifera L. cv Nebbiolo and Barbera, chosen for their different anthocyanin profiles, were post-harvest treated for 24 and 72 h with gaseous ozone (30 μL/L). Skin anthocyanin and flavanol extractability was assessed during maceration (6, 24, 48, 96, 168 and 240 h) using a wine-like solution. In our experimental conditions, ozone did not affect significantly the final extraction yield of anthocyanins (TA), proanthocyanidins (PRO), and flavanols reactive to vanillin (FRV) in Barbera, although TA and FRV extractabilities were higher in control samples than in ozone-treated samples during the first stages of maceration. In Nebbiolo, the final TA extraction yield was positively influenced by the ozone treatment (68.6, 64.2, and 59.9\% for 24 h ozone-treated berries, 72 h ozone-treated berries and control samples, respectively). Final PRO and FRV extractability also increased in both ozone-treated samples compared to the control (+ 8.6–9.1\% for PRO and + 7.3–11.7\% for FRV). No significant differences were found among treatments for individual anthocyanins in both cultivars at the end of maceration. Therefore, the use of ozone as sanitizing agent in red varieties prior to winemaking process can be considered because it did not negatively affect the extractability of skin anthocyanins and flavanols.},
	keywords = {anthocyanins; extractability; flavanols; grape post-harvest treatment; ozone},
	doi = {10.1016/j.foodres.2016.11.013},	
	pages = {68--78}
}

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