Terroir 2010 banner
IVES 9 IVES Conference Series 9 Stomatal restrictions to photosynthesis in grapevine cultivars grown in a semiarid environment

Stomatal restrictions to photosynthesis in grapevine cultivars grown in a semiarid environment

Abstract

Diurnal changes in the leaves of field-grown grapevine (Vitis vinifera L.) cultivars Syrah and Tempranillo were followed over summer 2009 with respect to gas exchanges. Net photosynthetic rate (AN) of both cultivars rapidly increased in the morning, decreasing slowly until the late afternoon, when reached the lowest values. Stomatal conductance (gs) changed in parallel with AN, indicating that AN was greatly affected by gs. This pattern was repeated every day throughout the summer, with slight modifications according to plant water status. Under severe water stress situations, when as a result of drought gs decreased below 0.05 mol H2O m-2 s-1, intrinsic water use efficiency (WUEi) declined sharply in Tempranillo, which did not happen in Syrah, where despite stomatal closure kept increasing WUEi. Water stress intensified leaf to air vapour pressure deficit (VpdL) response however instantaneous WUE (WUE inst) levels plunged to very low with high VpdL in both cultivars.

Download the PDF

DOI:

Publication date: October 6, 2020

Issue: Terroir 2010

Type: Article

Authors

J. Martínez, J. L. Chacón

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

Contact the author

Keywords

leaf to air vapour pressure deficit – leaf water potential – net photosynthetic rate – stomatal conductance – transpiration rate – water use efficiency

Tags

IVES Conference Series | Terroir 2010

Citation

Related articles…

The soil application of a plant-derived protein hydrolysate speeds up selectively the ripening-specific processes in table grape

Grapevine is one of the most extensively cultivated fruit crops, playing a crucial role in the economies of many grape-growing regions around the world.
Read More

Investigating the impact of bottle color, temperature and light exposure on rose wine characteristics

Rosé is leading the fastest growth wine category which hit a 40% increase since 2002. France accounts for over a third (34%) of global consumption followed by the US

Read More

Uncovering the influence of vineyard management on fungal community structure and functional diversity within above-ground compartments

In viticulture, microbial communities – particularly fungi – play a vital role in plant health, disease management, and grape quality.

Read More

Zonage et caractérisation des terroirs de l’AOC Côtes-du-Rhône: exemple du bassin de Nyons-Valreas

The southern Côtes-du-Rhône vineyard shows a significant variety of ecological facets over the Lower Rhone Valley. Intending to characterize such a variety of “terroir “called vineyard situations, a spatial approach based on identification of soil landscapes has been initiated.

Read More

Comparison between the volatile chemical profile of two different blends for PDO “Valpolicella Superiore”

Valpolicella is a famous wine producing region located in the north of Verona close to Garda lake and owes its fame above all to the production of two Protected Designation of Origins (PDOs) withered wines: Amarone and Recioto. Nowadays the production of another PDO, Valpolicella Superiore is gaining more attention by the consumers, increasing the interest of the wineries to improve the quality of this wines

Read More