Terroir 2008 banner
IVES 9 IVES Conference Series 9 Variability in intrinsic water use efficiency (WUEi) of eight red varieties grown in the center of the Iberian Peninsula during an atypical vintage year

Variability in intrinsic water use efficiency (WUEi) of eight red varieties grown in the center of the Iberian Peninsula during an atypical vintage year

Abstract

The study was performed in the summer of 2007, the point of confluence of a rather atypical vintage year in the area with abnormally low temperatures after a very humid spring. The experiment was carried out in a fully productive vineyard with espalier cultivation and different varieties in one of the largest terroirs of La Mancha (region in the center of Spain). Eight red varieties, i.e., five traditional varieties of the region (Tempranillo, Garnacha Tinta, Bobal, Tinto Velasco and Moravia Agria) and three international varieties (Merlot, Syrah and Cabernet Sauvignon), were studied.
Daily monitoring of the gas exchange was performed with a portable infrared gas exchange system at different development stages (closure of the bunches, veraison and maturity). The recorded measurements allowed to determine, for each studied variety, the values of net photosynthesis (AN), stomatal conductance (gs) and transpiration (E) as well as to calculate intrinsic water use efficiency (WUEi).
The results showed significant differences between varieties as far as the gas exchange parameters are concerned. Bobal, Moravia Agria and Cabernet Sauvignon showed rather high assimilation rates (AN) during the day, usually above the rest. In turn, the WUEi proved that the Garnacha Tinta and Tempranillo varieties belong to the most efficient group under moderate water stress conditions.

DOI:

Publication date: December 8, 2021

Issue: Terroir 2008

Type : Article

Authors

Jesús MARTÍNEZ GASCUEÑA and Juan Luis CHACÓN VOZMEDIANO

Instituto de la Vid y del Vino de Castilla-La Mancha (IVICAM).
Ctra. de Albacete, s/n. 13700 Tomelloso (Ciudad Real), Spain

Contact the author

Keywords

varieties, intrinsic water use efficiency, photosynthesis, Vitis vinífera

Tags

IVES Conference Series | Terroir 2008

Citation

Related articles…

The impacts of frozen material-other-than-grapes (MOG) on aroma compounds of red wine varieties

An undesirable note called “floral taint” has been observed in red wines by winemakers in the Niagara region caused by large volumes of frozen leaves and petioles [materials-other-than-grapes (MOG)] introduced during mechanical harvest and subsequent winemaking late in the season. The volatiles, which we hypothesized are responsible, are primarily terpenes, norisoprenoids, and specific esters in frozen leaves and petioles. The purpose of this study was to investigate the volatile compounds which may cause the floral taint problem and explore how much of them (thresholds) may lead to the problem. Also, the glycosidic precursors of some of these compounds were analyzed to see the changes happening during frost events.

Aromatic profile of six different clones of Chardonnay grape berries in Minas Gerais (Brazil)

Aromas are one of the key points in food analysis since they are related to character, quality and consequently consumer acceptance. It is not different in the winery industry, where the aromatic profile is a combination of viticultural and oenological practices. Based on the development of more aromatic clones and on the potential to produce sparkling wines at Caldas, in the southern region of Minas Gerais (Brazil) (21°55´S and 46°23´W, altitude 1,100m), the aim of this work was the determination of volatile compounds in six different clones of Chardonnay grape berries to better understand which compounds add bouquet to the wine, and additionally comprehend the impacts of the edaphoclimatic and annual conditions on the improvement of grape-growing and winemaking practices.

Improving stilbenes in vitis Labrusca L. Grapes through methyl jasmonate applications

Grapes (Vitis sp.) are considered a major source of phenolic compounds such as flavonols, anthocyanins and stilbenes. Studies related to the beneficial effects of these compounds on health have encouraged research aimed at increasing their concentration in fruits. On this behalf, several plant growth regulators such as jasmonic acid and its volatile ester, methyl-jasmonate (MeJa), have demonstrated promising results in many fruits. However, Brazilian subtropical climate might interfere on treatment response. The present study aims to evaluate the application of MeJa in the pre-harvest period in Concord and Isabel Precoce grapes (Vitis labrusca L.).

Service crop effects on grapevine water and nitrogen status and yield under Mediterranean climate

Service crops in vineyard can provide multiple ecosystem services but they can also lead to competition with the grapevine for soil resources in the Mediterranean region due to potential severe droughts (Garcia et al., 2018). One of the levers of action to manage this competition is the choice of species adapted in terms of growth dynamics and water and nutrients’ needs. The objectives of this study were to determine the effect of temporary service crops on grapevine water and nitrogen status and grapevine yield and yield components in a Mediterranean vineyard.

Impact of deficit irrigation strategies on terpene concentration in Gewürztraminer grapes

Deficit irrigation is a viticultural practice often applied to improve the phenolic composition of red grapes and wines. However, the impact of this practice on grape terpenes – key aromatics for several grapes and wines – remains largely unknown. This study investigated the impact of deficit irrigation strategies on free and glycosylated terpenes in Gewürztraminer grapes. In a field study conducted in Oliver, BC, in 2016, 2017, and 2018, deficit irrigation regimes were applied to Gewürztraminer vines at different developmental stages (pre-veraison = Early Deficit, ED; post-veraison = Late Deficit, LD; throughout the season = Prolonged Deficit, PD). A well-irrigated control (CN) treatment was also established.