terclim by ICS banner
IVES 9 IVES Conference Series 9 Rootstock influence on xylem embolized vulnerability and scion behavior under severe water deficit

Rootstock influence on xylem embolized vulnerability and scion behavior under severe water deficit

Abstract

Severe water stress events can induce cavitation damage by xylem embolism in grapevine, diminishing plant hydraulic conductance. This work aimed to determine the rootstock effects on 1) xylem embolism vulnerability to understand its function failure under severe drought, including segmentation processes from leaf to root; and 2) hydraulic conductance across water deficit and its recovery. For this purpose, two complementary experiments were performed in one-year-old Vitis vinifera cv. Tempranillo grafted onto two different rootstocks (110-Richter and SO4) under well-watered 12L pot conditions. In experiment 1, the water-stress induced xylem embolism was monitored in leaves and stems, above and below grafting-point, by using “Cavicam” for determining the percentage of embolized vessels (at P12, P50 and P88). In experiment 2, analogue plants were submitted to a progressive water deficit while assessing vine water status and physiological behavior. In addition, the anatomical characteristics of leaf and stem xylem tissues were analyzed. Results of experiment 1 revealed that the embolism process started from the leaf to the root, showing hydraulic segmentation. Significant differences were found in the ψ at different P stages in the two combinations. However, neither significant rootstock effects were found on any of the parameters derived from pressure-volume curves, nor on hydraulic segmentation. Nevertheless, hydraulic segmentation seems to be correlated with the size of xylem diameter. In experiment 2, rootstock xylem anatomy was found to be related the scion behavior, influencing plant hydraulic conductivity and net photosynthesis in both well-watered and water-stressed conditions. Further studies are needed to confirm these results.

Download the abstract

DOI:

Publication date: June 13, 2024

Issue: Open GPB 2024

Type: Article

Authors

José M. Escalona1,2*, Luis Flor1,2, Guillermo Toro4, Antoni Sabater2, Marc Carriquí1,3 Hipólito Medrano1,2 and Ignacio Buesa5

1 Research Group of Plant Biology under Mediterranean conditions. University of Balearic Islands (PlantMed)
2 Agro-Environmental Sciences and Water Economics Institute. University of Balearic Islands (INAGEA-UIB)
3 Instituto de Ciencias Forestales (ICIFOR-INIA), CSIC, Carretera de La Coruña km. 7.7. 28040 Madrid, España.
4 Centro de Estudios Avanzados en Fruticultura (CEAF). Las Parcelas 882, Rancagua, Chile
5 Centor de investigaciones sobre desertificación (CIDE-CSIC-UV-GVA). Moncada, Valencia, España

Contact the author*

Keywords

Cavitation, xylem vessels, gas exchange, drought, recovery

Tags

IVES Conference Series | Open GPB | Open GPB 2024

Citation

Related articles…

Understanding aroma loss during partial wine dealcoholization by vacuum distillation

Dealcoholization of wine has gained increasing attention as consumer preferences shift toward lower-alcohol or
alcohol-free beverages. This process meets key demands, including health-conscious lifestyles, regulatory
compliance, and the expanding non-alcoholic market [1-3].

Read More

The suitability for viticulture at varying altitudes: a study of grapevine ripening in the Italian Alps

Planting vineyards in cooler climates has been used over recent years as
a strategy to counter the climatic shifts caused by climate change. A move towards higher altitudes in hilly and mountainous wine regions may provide a solution to deleterious effects that increased ambient temperatures have on wine quality. Until now, the influences of higher altitudes and their climates, as well as their effect on vine growing cycles, still holds a lot of scientific uncertainty. The transnational EU-funded project REBECKA (Interreg V-A IT-AT: ITAT1002, duration: 2017-2019) has the objective to develop a regional valuation method to rate the suitability for viticulture in South Tyrol (Italy) and Carinthia (Austria). Preliminary surveys were performed regarding the effects of altitude on ripening performance of the cultivar Pinot Noir.

Read More

Wine yeast species show strong inter- and intra-specific variability in their sensitivity to uv-c radiation

While the trend in winemaking is toward reducing the inputs and especially sulphites, the development of While the trend in winemaking is toward reducing the inputs

Read More

Can grapevine intra-varietal genetic variability be a tool for climate change adaptation? A case study at a hot and dry environment

Climate change projections point to an increase of temperatures and changes in rainfall patterns in the mediterranean region.

Read More

Sélection génétique des variétés originelles d’Arménie, berceau de la viticulture mondiale

Armenia, a small country in the South of the Caucasus, has been rediscovering its wine-growing past since the discovery in 2007 of archaeological wine-growing remains dating back around 8,000 years. They are among the oldest in the world. Despite a great diversity of grape varieties, Armenian winegrowers did not have sufficiently organized genetic collections to produce plants and satisfy the growing demand for planting.

Read More