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.

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 role of vine trunk height in delaying grape ripening: insights for viticultural adaptation strategies

Global changes in temperature patterns necessitate the development of viticultural adaptation strategies. One promising approach involves modifying the training system and elevating trunk height. This study explored the potential of raising the vine trunk as an adaptive strategy to counteract the effects of increasing temperatures and delay ripening. Thermal conditions, radiation levels, and must composition were measured at different heights (10 and 150 cm) in a commercial vineyard of the minority variety Maturana Blanca, trained on a vertical cordon.

Comportement phénologique et végétatif de la cv “Italia” en rapport an climat dans les deux zones typiques de viticulture de table en Sicile

Le travail a le but de contribuer à faire connaître l’influence du milieu, en particulier le climat, sur l’expression génétique de la variété Italia en Sicile.
L’etude a étè effectué durant six années, du 1992 au 1997

Baccus: from framework to web platform for self-assessment of wine sustainability

Sustainability is becoming an increasingly present challenge, whether due to an increase in the level of perception and demand from consumers and stakeholders or the rise of events linked to climate change, which directly impacts agricultural-based sectors such as the vine and wine industry.

Experiments with the use of stems in Pinot noir winemaking

Vinification trials were carried out between 2018 and 2021 in the experimental winery at Laimburg Research Centre, Alto Adige, to test the effect of grape stem inclusion during fermentation of Pinot Noir.

Role of Harvesting Time/Optimal Ripeness in Zone/Terroir Expression

La maturité optimale est définie en fonction du style de vin désiré, qui est fonction du marché. Le sol et le climat ont un effet sur la typicité des vins. Le niveau qualitatif des raisins et des vins, et le potentiel pour obtenir différents styles de vin est déterminé par l’association des caractéristiques naturel du terroir et les technologies mises en