terclim by ICS banner
IVES 9 IVES Conference Series 9 International Congress on Grapevine and Wine Sciences 9 2ICGWS-2023 9 Exploring the genetic diversity of leaf flavonoids content in a set of Iberian grapevine cultivars: preliminary results

Exploring the genetic diversity of leaf flavonoids content in a set of Iberian grapevine cultivars: preliminary results

Abstract

The use of grapevine genetic diversity is a way to mitigate the negative impacts of climate change on viticulture systems. Leaf epidermal flavonoids (including flavonols and anthocyanins) are involved in plant defense mechanisms against environmental stresses, like high temperatures or excessive solar radiation [1,2]. Among other factors, they modulate light absorption, which reduces photoinhibition processes in photosynthetic tissues [1]. Therefore, the identification of grapevine cultivars with an increased content on leaf epidermal flavonoids arises as a potential avenue to improve grapevine tolerance to some detrimental environmental stresses. Here, we analyzed the content in leaf flavonols and leaf anthocyanins at full-veraison in 63 genetically diverse grapevine cultivars from different Iberian regions grown under the same conditions by two alternative optical sensors (Dualex and MPM-100). Both non-invasive systems proved to be able of estimating leaf epidermal flavonoids content in a wide set of cultivars of high genetic diversity, providing highly-correlated results. Whilst we observed a moderate range of variation for leaf flavonols (they were found to vary by a 1.5-fold factor), a higher range of variation was observed for leaf anthocyanins, which varied by a 15.0-fold factor. In addition, this screening allowed us to detect some cultivars with a significant higher content on leaf epidermal flavonols than some widely extended grapevine cultivars, suggested as potential candidates with better adaptation capacity to the expected conditions due to climate change.

Acknowledgements: This work is part of the project “Diversidad genética en la vid y adaptación al cambio climático” (PID2020-120183RB-I00), funded by MCIN/AEI/10.13039/501100011033.

References:

1)  Steyn, W.J. et al. (2002) Anthocyanins in vegetative tissues: a proposed unified function in photoprotection. New Phytol., 155: 349-361, DOI 10.1046/j.1469-8137.2002.00482.x 

2)  Daryanavard, H.et al. (2023) Flavonols modulate plant development, signaling, and stress responses. Curr. Opin. Plant Biol., 72: 102350, DOI: 10.1016/j.pbi.2023.102350

DOI:

Publication date: October 6, 2023

Issue: ICGWS 2023

Type: Poster

Authors

Javier Tello1*, Yolanda Ferradás1,2, Javier Ibáñez1

1 Instituto de Ciencias de la Vid y del Vino, Finca La Grajera, Ctra. de Burgos Km. 6, 26007 Logroño
2 Facultad de Biología, Universidad de Santiago de Compostela, 15872 Santiago de Compostela

Contact the author*

Keywords

anthocyanins, climate change, flavonols, non-invasive phenotyping, Vitis vinifera

Tags

2ICGWS | ICGWS | ICGWS 2023 | IVES Conference Series

Citation

Related articles…

A phylogenomic study reveals the major dissemination routes of ‘Tempranillo Tinto’ in the Iberian Peninsula

‘Tempranillo Tinto’ is a black-berried Iberian cultivar that originated from a hybridization between cvs. ‘Benedicto’ and ‘Albillo Mayor’ [1]. Today, it is the third most widely grown wine grape cultivar worldwide with more than 200,000 hectares of vineyards mostly distributed along the Iberian Peninsula, where it is also known as ‘Cencibel’, ‘Tinta de Toro’, ‘Tinta Roriz’, and ‘Aragonez’, among other synonyms. Here, we quantified the intra-varietal genomic diversity in this cultivar through the study of 35 clones or ancient vines from seven different Iberian wine-making regions. A comparative analysis after Illumina whole-genome sequencing revealed the presence of 1,120 clonal single nucleotide variants (SNVs).

The surprising role of VvLYK6 in grapevine immune responses triggered by chitin oligomers

For sustainable viticulture, the substitution of chemical inputs with biocontrol products has become one of the most considered strategies. This strategy is based on elicitor-triggered immunity that requires a deep understanding of the molecular mechanisms involved in plant defense activation. Plant immune responses are triggered through the perception of conserved microbe-associated molecular patterns (MAMPs) which are recognized by pattern recognition receptors (PRRs) at the plasma membrane.

Impact of temperature and solar radiation on grape composition variability in the Saint-Emilion winegrowing area 

Grape composition is strongly influenced by climate conditions. Their expected modifications in near future, notably because of increased temperatures, could significantly modify the biochemical composition of berries at harvest, and thus wine typicity and quality. Elevated temperatures favor sugar accumulation in grapes, enhance malic acid degradation and modify the amino acid content. They also reduce significantly anthocyanin accumulation in Merlot, leading to the imbalance between anthocyanins and sugars, while no significant effects on final anthocyanin levels were reported in Tempranillo[1] and finally affect aromas or aroma precursors.

Identification of several glycosidic aroma precursors in six varieties of winemaking grapes and assessment of their aroma potential by acid hydrolysis

In winemaking grapes, it is known that most aroma compounds are present as non-volatile precursors, such as glycosidic precursors. In fact, there is strong evidence supporting the connection between the content of aroma precursors and the aromatic quality of wine [1]. Acid hydrolysis is preferred to reveal the aroma potential of winemaking grapes, as it predicts more accurately the chemical rearrangements occurring during fermentation in acidic environments [2]. In this study, a method involving a fast fermentation followed by acid hydrolysis at 75ºC was used to evaluate the accumulation of aroma compounds over time in fractions obtained from six different varieties of winemaking grapes.

The weak role of organic mulches in shaping bacterial communities in grapevine

The interest in sustainable and ecologic agricultural practices in grapevine has grown significantly in recent years in the context of ecological transition. Organic mulches are treatments that support the circular economy and positively affect the soil and the plant. They are an alternative to herbicides and other conventional practices since they may influence soil moisture, erosion, structure and weed control. However, their effects on the soil and must microbiota remain unknown.