terclim by ICS banner
IVES 9 IVES Conference Series 9 Long-Term impact of elevated CO2 exposure on grapevine physiology (Vitis vinifera L. cvs. Riesling & Cabernet Sauvignon)

Long-Term impact of elevated CO2 exposure on grapevine physiology (Vitis vinifera L. cvs. Riesling & Cabernet Sauvignon)

Abstract

Over the next 25 years, the Intergovernmental Panel on Climate Change (IPCC 2013) predicts a ~20% increase in atmospheric carbon dioxide (CO2) concentration compared to the current level. Concurrently, temperatures are steadily rising. Grapevines, known for their climate sensitivity, will show changes in phenology, physiological processes and grape compositions in response. Investigating eco-physiological processes provides insights into the response of field-grown grapevines to elevated CO2 conditions. A Free Air Carbon Dioxide Enrichment (FACE) facility was established in the Rheingau region of Germany. Two grapevine varieties (Vitis vinifera L., cvs. Riesling and Cabernet Sauvignon) were planted, with the VineyardFACE comprising three rings with ambient atmospheric CO2(approx. 400 – 420 ppm from 2014 to 2023, aCO2) and three rings with elevated CO2 concentration (+20% to ambient; eCO2). Abaxial leaf imprints revealing that both varieties reached their highest stomatal density in the early years of the study. Riesling leaves exhibited a higher density compared to Cabernet Sauvignon. In a warmer year like 2020, both varieties responded with a lower density. With continuously exposition to eCO2 the differences in stomatal conductance became increasingly negligible. The net photosynthesis of both varieties peaked in the later and warmer period of the study (2018 – 2022), with plants under elevated CO2 concentration achieving significantly higher assimilation rates. Accompanying this, plants under aCO2 conditions exhibited a higher non-photochemical quenching, whereas electron transport rate and photochemical quenching under eCO2 conditions were higher. Long-term studies are necessary to estimate the consequences for growers in the future.

DOI:

Publication date: June 13, 2024

Issue: Open GPB 2024

Type: Article

Authors

Susanne Tittmann*, Lilian Schmidt, Manfred Stoll

University Geisenheim, Department of general and organic viticulture, Von-Lade-Str. 1, D-65366 Geisenheim, Germany

Contact the author*

Keywords

climate change, viticulture, grapevine physiology, elevated CO2 concentration, FACE facility

Tags

IVES Conference Series | Open GPB | Open GPB 2024

Citation

Related articles…

New tools for a visual analysis of vineyard landscapes?

A vineyard landscape is above all an area observed by someone, that is to say a physical entity perceved and represented by this person.

Rapid quantification of higher alcohols in wine, port wine and brandy by HS-GC-FID

In response to the growing demand for rapid, precise, and efficient methods of quantifying volatile compounds in alcoholic beverages, this study presents a novel approach for the determination of higher alcohols in wine, port wine, and brandy.

Grape seed powder as an alternative to bentonite for wine fining

PR proteins can cause haze in wines, and the risk is to keep the wine unsold. Generally, in winemaking bentonite solves this problem by removing proteins, but it is not a renewable resource, has poor settling, which means difficulty in filtering after use and a considerable loss of wine, it is not a specific adsorbent and may reduce aromas and flavor compounds

Characterization of a unique mannan from Starmerella bacillaris for protein stabilization in white wine

Yeast cell wall components are valuable biotechnological tools with applications in oenology and beyond [1], [2].

Chinese localization of wine aroma descriptors

Wine aroma descriptors are important tools for wine evaluation. The present well-known wine aroma descriptor system was created and based on Western culture, which makes difficult for Chinese consumers to recognize and learn wine. AIM: The aim of this study was to update the wine aroma descriptor system for Chinese.

Methods: Fifty-four wine aroma descriptors of ‘Le nez du vin’ was used as substitution candidates. Firstly, a survey on unfamiliar aromas was distributed to 150 untrained Chinese wine consumers. Twenty attributors, such as blackcurrent buds, quince, linden, were selected as the most 17 unfamiliar. Then, a descriptive analysis was performed by trained tasting panel to substitute the targeted twenty aromas perfume. Furthermore, reference standards were looked and new le nez du vin were made. Finally, a substitution analysis was performed to replace the unknown wine aroma to the Chinese local aromas.