Fining strategies for quercetin deposit prevention in sangiovese wines

Picariello, Luigi; Rinaldi, Alessandra; Moio, Luigi; Moine, Virginie; Gambuti, Angelita

doi:10.1016/j.lwt.2023.115218

Cited by 2 publications

(2 citation statements)

References 32 publications

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“…The instability caused by 3,5,7,3′,4′‐pentahydroxyflavone and the consequence precipitation of aglycones characterized by a lower aqueous solubility (after acid hydrolysis in wine) represent recent problems because of the combined viticultural management evolution and the climate change (Gambuti et al., 2020). Various manuscripts recorded the accumulation of quercetins in Sangiovese grapevine (Lanati et al., 2021; Picariello et al., 2023; Simonetti et al., 2022).…”

Section: Discussionmentioning

confidence: 99%

Prevention of drought damage through zeolite treatments onVitis vinifera: A promising sustainable solution for soil management

Cataldo,

Puccioni,

Eichmeier

et al. 2024

Soil Use and Management

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Viticultural activity is intrinsically interlocked with climatic fluctuations and awful subjected to soil management. Increasing temperatures and reduced precipitation originate several alterations in the metabolic plant pathway and a depletion in grapes quality. The main aspiration of soil management is to keep and retain a microenvironment that considers all vine requirements to upgrade the balance between vegetative growth and cluster quality intensifying its resilience towards abiotic stress. Aiming to establish match and dissimilar drought stress responses among Sangiovese grapevines, we scouted ecophysiological and biochemical alterations after zeolite and irrigation soil application (combined and/or alone), using as control plants naturally exposed to abiotic stress in a Chianti Classico vineyard. When grapevines were exposed to water stress alone, the main reactions encompassed dwindled leaf midday water potential (Ψleaf) and increased proline content. These were accompanied by augments in zeaxanthin and lutein leaf contents, symptomatic of oxidative stress. Positive metabolic alterations in grapes triggered by zeolite and/or water showed some influence on the ripening of the berry differently depending on the year. They created a situation of resilience in berry avoiding arrest in the anthocyanin synthesis pathway during the warmest season and produced a more balanced maturation, closer to the objectives of the modern producer of classic Chianti (i.e. fresher and less alcoholic wines) during the fresher one. Under severe drought, it was activated the shikimic acid pathway and in stressed vines treatment, (WS) a reduction in malic acid content was found. Sugar and phenolic compounds were enhanced by zeolitic and undrought treatments. A negative effect enkindled by the drought and high temperatures combined with stress was the accumulation of quercetin‐3‐O‐rutinoside (Qrut), quercetin‐3‐O‐galactoside (Qgala), quercetin‐3‐O‐glucoside (Qgluc) and quercetin‐3‐O‐glucoronide (Qgluco) in WS treatment. These results summarize that clinoptilolite applied to the soil, both combined with water as well in purity, noteworthy protectorship from more detrimental repercussions of drought‐stressed grapevines, suggesting that new sustainable approaches in soil management are useful for the wellness of vines.

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Section: Discussionmentioning

confidence: 99%

Prevention of drought damage through zeolite treatments onVitis vinifera: A promising sustainable solution for soil management

Cataldo,

Puccioni,

Eichmeier

et al. 2024

Soil Use and Management

View full text Add to dashboard Cite

show abstract

“…This may limit the negative effect that practices, such as the use of fining agents, could have including the precipitation of colorant matter. 26 Nevertheless, individual anthocyanin data (Table 5) revealed that, regardless of the presence of seed nuclei and temperature conditions, a decrease in monomeric anthocyanins is evident. The treatment at higher temperatures did not totally prove advantageous for all wines.…”

Section: Precipitation Trialmentioning

confidence: 96%

Anthocyanins and nucleation seeds are key factors affecting quercetin precipitation in red wines

Luciano,

Picariello,

Forino

et al. 2024

J Sci Food Agric

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Backgroundclimate changes have been leading to an excessive synthesis of Quercetin (Q) and its glycosides (Q‐Gs) in specific red grape varieties, such as Sangiovese. This has resulted in concentrations overcoming the solubility threshold of Q in wines, with the consequent formation of undesirable precipitates. This study aims at assessing the impact of various factors, including anthocyanins, temperature, nucleation seeds, and time, on the precipitation of Q in red wine.ResultsThe influence of anthocyanins on Q solubility was examined by adding a grape skin extract rich in anthocyanins to a model solution containing 89 μM of Q. The data revealed that the solubility of both Q and Q‐Gs increased as a function of the anthocyanin concentration in the model solution. In a subsequent experiment, red wines were stored at two different temperatures (2°C and 20°C), supplemented with Q nucleation seeds, and monitored over a 10‐day period. Notably, after only 3 days of contact with Q seeds at 2°C, a reduction of over 75% in Q concentration was observed in the supernatant. Among the considered factors, contact with nucleation seeds emerged as the most significant one (p < 0.0001).ConclusionQ precipitation in red wines is influenced by the presence of anthocyanins in solution, although it is not the sole determinant. The data also suggested that a potential strategy for wineries to mitigate the risk of Q precipitation in bottled wine would be the acceleration of this process by promoting the formation of nucleation seeds.This article is protected by copyright. All rights reserved.

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Fining strategies for quercetin deposit prevention in sangiovese wines

Cited by 2 publications

References 32 publications

Prevention of drought damage through zeolite treatments onVitis vinifera: A promising sustainable solution for soil management

Prevention of drought damage through zeolite treatments onVitis vinifera: A promising sustainable solution for soil management

Anthocyanins and nucleation seeds are key factors affecting quercetin precipitation in red wines

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