OENO IVAS 2019 banner
IVES 9 IVES Conference Series 9 Mitigating the effects of climate change on berry composition by canopy management

Mitigating the effects of climate change on berry composition by canopy management


Primary and secondary metabolites are major components of grape composition and their balances define wine typicality. Global climate change is modifying vine physiology and especially the composition of grape berries at harvest, by decoupling phenolic and aromatic maturities (depending on secondary metabolites) from technical maturity (depending on primary metabolites). These modifications can be limited through vineyard management. One of the rapid and efficient ways to mitigate the effects of climate change is to modify vine canopy, thus modifying the relationships between source and sink. 

To face this challenge, we used Vitis vinifera cv. Cabernet Sauvignon plants 1) to analyse the response of yield and biochemical composition in ripening berries, including sugars, organic acids, amino acids, phenolic compounds (anthocyanins, flavonols) and aroma molecular makers including methoxypyrazines associated with the green character (low ripenning), volatile thiols (and their precursors), as well as furanones and lactones linked with the cooked/dried fruit aromas (overipenning), with UHPLC, GC-MS and LC-MS analyses; 2) to link the changes in berry composition with wine quality by microvinification sensory analysis; 3) to study the response of berry transcriptome to canopy manipulation, by RNAseq or qPCR analyses. 

 The results showed that metabolites had different sensitivities to the modulation of leaf-to-fruit ratios, demonstrating that it is possible to determine an optimal leaf/fruit ratio to reduce sugar concentration in the berry without much impact on the typicality of Bordeaux wines


We thank the CIVB for financial support to the CANOGRAPE project N ° 44233 and France AgriMer for financial support to CANABA project N°414


Publication date: June 9, 2020

Issue: OENO IVAS 2019

Type: Article


Sabine Guillaumie (1), Eloïse Brouard (1), Lina Wang (1), Ghislaine Hilbert (1), Cécile Thibon (2), Isabelle Merlin (1), Alexandre Pons (2,3), Christel Renaud (1), Claudine Trossat-Magnin (1), Nathalie Ollat (1), Serge Delrot (1), Philippe Darriet (2), Eric Gomès (a), Zhanwu Dai (1), Sabine Guillaumie (1)

(1) UMR EGFV, Bordeaux Sciences Agro, INRA, University of Bordeaux, ISVV, Villenave d’Ornon, France
(2) Unitéde recherche Oenologie, EA 4577, USC 1366 INRA, ISVV, Universitéde Bordeaux, Bordeaux INP, F33882 Villenave d’Ornon France
(3) SEGUIN MOREAU France, Cognac, France

Contact the author


climate change, leaf/fruit ratio, berry composition, wine


IVES Conference Series | OENO IVAS 2019


Related articles…

Physiological and growth reaction of Shiraz/101-14 Mgt to row orientation and soil water status

Advanced knowledge on grapevine row orientation is required to improve establishment, management and outcomes of vineyards on terroirs with different environmental conditions (climate, soil, topography) and in view of a future change to more extreme climatic conditions. The purpose of this study was to determine the combined effect of row orientation, plant water status and ripeness level on the physiological and viticultural reaction of Shiraz/101-14 Mgt.

Effects of mechanical leafing and deficit irrigation on Cabernet Sauvignon grown in warm climate of California

San Joaquin Valley accounts for 40% of wine grape acreage and produces 70% of wine grape in California. Fruit quality is one of most important factors which impact the economical sustainability of farming wine grapes in this region. Due to the recent drought and expected labor cost increase, the wine industry is thrilled to understand how to improve fruit quality while maintaining the yield with less water and labor input. The present study aims to study the interactive effects of mechanical leafing and deficit irrigation on yield and berry compositions of Cabernet Sauvignon grown in warm climate of California.

The effects of cane girdling on berry texture properties and the concentration of some aroma compounds in three table grape cultivars

The marketability of the table grapes is highly influenced by the consumer demand; therefore the market value of the table grapes is mainly characterized by its berry size, colour, taste and texture. Girdling could cause accumulation of several components in plants above the ringing of the phloem including clusters and resulting improved maturity. The aim of the experiments was to examine the effect of girdling on berry texture characteristics and aroma concentration.

Application of a fluorescence-based method to evaluate the ripening process and quality of Pinot Blanc grape

The chemical composition of grape berries at harvest is one of the most important factors that should be considered to produce high quality wines. Among the different chemical classes which characterize the grape juice, the polyphenolic compound, such as flavonoids, contribute to the final taste and color of wines. Recently, an innovative non-destructive method, based on chlorophyll fluorescence, was developed to estimate the phenolic maturity of red grape varieties through the evaluation of anthocyanins accumulated in the berry skin. To date, only few data are available about the application of this method on white grape varieties.

Different yield regulation strategies in semi-minimal-pruned hedge (SMPH) and impact on bunch architecture

Yields in the novel viticulture training system Semi-Minimal-Pruned Hedge (SMPH) are generally higher compared to the traditional Vertical Shoot Positioning (VSP). Excessive yields have a negative impact on the vine and wine quality, which can result in substantial losses in yield in subsequent vintages (alternate bearing) or penalties in fruit quality. Therefore yield regulation is essential. The bunch architecture in SMPH differs from VSP. Generally there is a higher amount but smaller bunches with lower single berry weights in SMPH compared to VSP.