terclim by ICS banner
IVES 9 IVES Conference Series 9 Unravel the underlying mechanisms of delaying ripening techniques in grapevine

Unravel the underlying mechanisms of delaying ripening techniques in grapevine

Abstract

In a scenario of changing climate conditions, grapevine is significantly affected at multiple levels. Advancements in phenology and berry ripening, however, are the major dynamics of the generalized increase in average temperature and evaporative demand, negatively affecting berry quality and productivity. The aim of this work was to unravel the underlying mechanisms of bunch-zone auxin application (NAA; 1-Naphthaleneacetic acid) and source-limiting canopy management approaches in delaying berry ripening. In randomized block design experiments, control vines were compared to vines treated with NAA, subjected to apical-to-bunch defoliation or antitranspirant application (n=10-to-42 plants per treatment). Juice chemical analysis, berry ripening kinetics and physiological traits were monitored every week from pre-veraison over multiple vineyards, years (2021, 2022, 2023) and varieties (Chardonnay, Pinot gris, Syrah, Merlot). Overall, all the treatments delayed berry ripening, and in particular °Brix build up, by 7 to up 15 days. Opposite trends were observed for total acidity, particularly malic acid concentration that displayed a slower degradation kinetic post-veraison. Time course expression profile of ripening-associated transcription factors revealed a significant and consistent repression for VviNAC60, VviNAC33, VviBHLH75, VviWRKY19, VviERF45 following the application of delaying ripening techniques. Similarly, abscisic acid and Indole-3-acetic acid concentration in the berry were modulated by treatments, with specific variation for their free and conjugated forms. This work enlightens, for the first time, the mechanistic framework of berry ripening dynamics following specific treatments with different mechanisms of action and provides novel avenues to harmonize management approaches in grapevine in the context of climate change.

Download the abstract

DOI:

Publication date: June 13, 2024

Issue: Open GPB 2024

Type: Poster

Authors

Michele Faralli1,2*, Oscar Bellon3, Sara Zenoni3, Massimo Bertamini1,2, Domenico Masuero2, Urska Vrhovsek2, Stefania Pilati2, Claudio Moser2

1 Center Agriculture Food Environment (C3A), University of Trento, 38098, San Michele all’Adige, Italy
2 Research and Innovation Centre, Fondazione Edmund Mach, San Michele all’Adige, Italy
3 Department of Biotechnology, University of Verona, Strada Le Grazie 15, 37134 Verona, Italy

Contact the author*

Keywords

Delaying ripening, Climate change, Auxin, Juice quality, transcription factors

Tags

IVES Conference Series | Open GPB | Open GPB 2024

Citation

Related articles…

Kinetic investigations of the sulfite addition on flavanols

Sulfonated monomeric and dimeric flavan-3-ols are recently discovered in wine and proved to have great importance in understanding wine chemistry and quality [1, 2].

Read More

Bioprotection en phase pré-fermentaire, synthèse de 3 ans d’expérimentations dans différentes régions viticoles

With growing consumer interest in products without chemical additives, limiting the use of sulfites is a priority for the wine industry. Bioprotection is a biological alternative that avoids or reduces the risks of alterations that have a negative impact on the organoleptic quality of wines and, ultimately, on their acceptability to consumers. bioprotection can also provide a response to the risks of microbiological deviations, which are increased both by climate change and by the organization of harvesting operations, which increasingly include the use of multi-bins filled at the vine, exposing the harvest to sometimes high temperatures for longer periods of time.

Read More

Seasonal variations and climate interactions with phenolic extractability of Pinot noir across the whole winemaking process

Context and Purpose of the Study. A deeper understanding of the relationship between weather conditions and wine quality is essential for assessing the impact of climate change and developing effective adaptation strategies.

Read More

The aroma diversity of Italian white wines: a further piece added to the D-Wines project

The wide ampelographic heritage of the Italian wine grape varieties represents a richness in terms of biodiversity and potential market value.

Read More

The grapesim model: a model to better understand the complex interactions between carbon and nitrogen cycles in grapevines

Nitrogen fertilization is an important practice to guarantee vineyards sustainability and performance over years, while ensuring berry quality. However, achieving a precise nitrogen fertilization to meet specific objectives of production is difficult. There is a lack of knowledge on the impact of nitrogen fertilizers (soil/foliar; organic/mineral) and different levels of fertilization on the interactions between carbon and nitrogen cycles within the vine. Crop models may be useful in that purpose because they can provide new insights of the effects of fertilization in carbon and nitrogen storage. The objective of this study is to build a model to simulate grapevine carbon and nitrogen content in vines to evaluate the impact of different fertilization strategies in vine growth and yield.

Read More