terclim by ICS banner
IVES 9 IVES Conference Series 9 Reduced berry skin epi-cuticular wax and cutin accumulation associates with a genomic deletion and increased polyphenols extractability in a clone of Tempranillo Tinto 

Reduced berry skin epi-cuticular wax and cutin accumulation associates with a genomic deletion and increased polyphenols extractability in a clone of Tempranillo Tinto 

Abstract

Tempranillo Tinto (TT) is the third-most planted red wine variety in the world, and it is mostly grown in the Iberian Peninsula. Spontaneous somatic variation appearing during vegetative propagation can be exploited to improve elite varieties as Tempranillo Tinto, including the selection of new phenotypes enhancing berry quality. We described previously that a somatic variant of TT with darker fruit color, the clone VN21, exhibits increased extractability of polyphenols during the winemaking process. To unravel the molecular mechanism underlying this phenomenon, we performed whole-genome resequencing to compare VN21 to other TT clones, revealing a 10 Mb deletion in chromosome 11 that likely affected only the L1 meristem cell layer of VN21 and tissues derived from it, such as external cell layers of berry skin. A putative loss-of-function allele of an ABCG32 gene (homologous to cuticle biogenesis transporters), was left hemizygous in this segment after the deletion in VN21. Scanning electron microscopy images suggested a lower content epi-cuticular wax in the berry cuticle of VN21, which likely leads to the shiny colour of VN21 berries. A GC-MS analysis of epi-cuticular waxes and cutins extracted from berry skin and leaves confirmed a general decrease in the accumulation of cuticle constituent compounds in VN21, supporting a role for the mutated ABCG32 transporter in the phenotype. Our findings show that somatic mutations altering berry cuticle biogenesis can have an effect on the extractability of polyphenols from the berry skin, which could be exploited for varietal wine innovation.

Download the abstract

DOI:

Publication date: June 13, 2024

Issue: Open GPB 2024

Type: Poster

Authors

Carolina Royo1*, Yolanda Ferradás1,2, Robin Bosman 3, Fernando Alba-Elías 4, Javier Ibáñez 1, Justin Lashbrooke 3, José Miguel Martínez-Zapater 1, Pablo Carbonell-Bejerano 1

1 Instituto de Ciencias de la Vid y del Vino, Finca La Grajera, Ctra. de Burgos Km. 6, 26007 Logroño. Spain
2 Current address: Facultad de Biología, Universidad de Santiago de Compostela, 15872 Santiago de Compostela. Spain
3 South African Grape and Wine Research Institute, Stellenbosch University, Stellenbosch, South Africa
4 Universidad de La Rioja, Departamento de Ingeniería Mecánica, Logroño, Spain

Contact the author*

Keywords

somatic variation, whole genome resequencing, deletion, waxes, GC-MS

Tags

IVES Conference Series | Open GPB | Open GPB 2024

Citation

Related articles…

Water status response of Vitis vinifera L. cv Cabernet-Sauvignon during the first years within the long-term VineyardFACE (Free Air Carbon dioxide Enrichment) study

Understanding the water-use responses of grapevines to increasing atmospheric carbon dioxide concentrations is mandatory when assessing the impact of climate change on viticulture as it is a critical part of the adaptation process.

Read More

Un Système d’Informations à Références Spatiales sur le Vignoble. Un outil performant d’aide aux recherches sur la caractérisation des terroirs viticoles

The “Terroirs d’Anjou” project led by the Agronomy sector of the Vine and Wine Research Unit of the INRA center in Angers aims to characterize the viticultural terroirs in a study area which includes 29 municipalities in the Maine et Loire and cuts across the Anjou, Coteaux du layon and Coteaux de l’Aubance appellation areas.

Read More

Accumulation of deleterious mutations in grapevine and its relationship with traits of interest for wine production and resilience

Deleterious mutations that severely reduce population fitness are rapidly removed from the gene pool by purifying selection. However, evolutionary drivers such as genetic drift brought about by demographic bottlenecks may comprise its efficacy by allowing deleterious mutations to accumulate, thereby limiting the adaptive potential of populations. Moreover, positive selection can hitchhike mildly deleterious mutations due to linkage caused by lack of recombination. Similarly, in the context of species domestication, artificial selection mimics these evolutionary processes, which can have undesirable consequences for production and resilience. In this study, we evaluated the extent of the accumulation of deleterious mutations and the magnitude of their effects (also known as genetic load) at the whole-genome scale for ca.

Read More

qNMR metabolomics a tool for wine authenticity and winemaking processes discrimination

qNMR Metabolomic applied to wine offers many possibilities. The first application that is increasingly being studied is the authentication of wines through environmental factors such as geographical origin, grape variety or vintage (Gougeon et al., 2019).

Read More

Under-vine cover crops as a management tool for irrigated Mediterranean vineyards: agronomic implications and changes in soil physical and biological properties 

Cover crops are increasingly considered in Mediterranean climate vineyards due to a combination of agronomic and regulatory considerations. However, the soil under the vines themselves is typically kept free of vegetation by mechanical plowing or herbicide spraying. Taking into account that these practices may convey a number of non-favourable economic and environmental implications, and the fact that drip irrigation can ease the use of cover crops under the vines, the aim of this work was to evaluate the agronomic implications and the changes in soil physical and biological properties caused by an under-vine cover crop in a Mediterranean area.

Read More