Terroir 2008 banner
IVES 9 IVES Conference Series 9 Influence of the year and the environmental factors on condensed tannins from Cabernet franc grapes

Influence of the year and the environmental factors on condensed tannins from Cabernet franc grapes

Abstract

The composition in condensed tannins of the grape berries is essential for the quality of the harvest. Proanthocyanidins have a significant influence on the organoleptic properties of the red wines.
The influence of the environmental factors on the Cabernet franc composition in condensed tannins was studied in Saumurois and Touraine. For 3 years, a network of 14 plots was conducted in an identical way in terms of viticultural management. The biochemical composition of the berries was analysed, in particular for the condensed tannins, by RP-HPLC after fractionation and thiolysis.
The results showed that the type of soil did not discriminate the plots. However, the quantity of tannins was influenced by the climatic variables except for sunshine. The duration of the vegetative cycle and its precocity had a significant influence on the percentage in prodelphinidin. The average degree of polymerization was correlated with the delta C13 and with rainfall between flowering and ripening. This study showed a year effect on the content of tannins, expressed in g/kg, the DPm and the percentage in prodelphinidin. The proportion in galloyled units was correlated with the water stress during the period previous veraison and by the vigour of the vine.

DOI:

Publication date: December 8, 2021

Issue: Terroir 2008

Type : Article

Authors

Réjane CHAMPENOIS, Yves CADOT, Nicolas BOTTOIS, Gérard BARBEAU

INRA, UE 1117 Vigne et Vin, F-49070 Beaucouzé, France

Contact the author

Keywords

terroir, tanins condensés, Cabernet franc, Vitis vinifera

Tags

IVES Conference Series | Terroir 2008

Citation

Related articles…

Flooding responses on grapevine: a physiological, transcriptional and metabolic perspective

Studies on model plants have shown that temporary soil flooding exposes roots to a significant hypoxic stress resulting in metabolic re-programming, accumulation of toxic metabolites and hormonal imbalance. To date, physiological and transcriptional responses to flooding in grapevine are poorly characterized. To fill this gap, we aimed to gain insights into the transcriptional and metabolic changes induced by flooding on grapevine roots (K5BB rootstocks), on which cv Sauvignon blanc (Vitis vinifera L.) plants were grafted.

Cascading effects of spring weather conditions into grape berry ripening

The effects of climate change on viticulture are complex due to interactions among factors and cascading effects.

Exploring the effect of ripening rates on the composition of aroma and phenolic compounds in Cabernet-Sauvignon wines

The study of cultural practices to delay ripening and the characterization of their effect on wine composition is important in the mitigation of accelerated ripening caused by higher temperatures

Chemical boundaries of wine identity: rationalizing grape and wine aroma diversity for improved terroir management

Aims: Wine perceived quality lies on a number of different factors. Among these, sensory features, which are in turn dependent on chemical composition, play a primary role. There is traditionally a great emphasis on producing wines that have specific sensory profiles, particularly aroma, that reflect identity features connected to the place and the variety of origin. In the case of high quality

Climate ethnography and wine environmental futures

Globalisation and climate change have radically transformed world wine production upsetting the established order of wine ecologies. Ecological risks and the future of traditional agricultural systems are widely debated in anthropology, but very little is understood of the particular challenges posed by climate change to viticulture which is seen by many as the canary in the coalmine of global agriculture. Moreover, wine as a globalised embedded commodity provides a particularly telling example for the study of climate change having already attracted early scientific attention. Studies of climate change in viticulture have focused primarily on the production of systematic models of adaptation and vulnerability, while the human and cultural factors, which are key to adaptation and sustainable futures, are largely missing. Climate experts have been unanimous in recognising the urgent need for a better understanding of the complex dynamics that shape how climate change is experienced and responded to by human systems. Yet this call has not yet been addressed. Climate ethnography, coined by the anthropologist Susan Crate (2011), aims to bridge this growing disjuncture between climate science and everyday life through the exploration of the social meaning of climate change. It seeks to investigate the confrontation of its social salience in different locations and under different environmental guises (Goodman 2018: 340). By understanding how wine producers make sense of the world (and the environment) and act in it, it proposes to focus on the co-production of interdisciplinary knowledge by identifying and foreshadowing problems (Goodman 2018: 342; Goodman & Marshall 2018). It seeks to offer an original, transformative and contrasted perspective to climate change scenarios by investigating human agency -individual or collective- in all its social, political and cultural diversity. An anthropological approach founded on detailed ethnographies of wine production is ideally placed to address economic, social and cultural disruptions caused by the emergence of these new environmental challenges. Indeed, the community of experts in environmental change have recently called for research that will encompass the human dimension and for more broad-based, integrated through interdisciplinarity, useful knowledge (Castree & al 2014). My paper seeks to engage with climate ethnography and discuss what it brings to the study of wine environmental futures while exploring the limitations of the anthropological environmental approach.