Terroir 2010 banner
IVES 9 IVES Conference Series 9 Adjustments of water use efficiency by stomatal regulation during drought and recovery of Verona province grape varieties grafted on two different vitis hybrid rootstocks

Adjustments of water use efficiency by stomatal regulation during drought and recovery of Verona province grape varieties grafted on two different vitis hybrid rootstocks

Abstract

Drought is considered to be the predominant factor both for determining the geographic distribution of vegetation and for restricting crop yields in agriculture. Furthermore, water stress is a limiting factor for a wide range of plant physiological processes and can have a profound effect on plant metabolism and development. Drought stress can decrease the sensitivity of photosynthesis to subsequent water deficits and similarly reduce the sensitivity of stomata to low atmospheric vapor pressure deficit during the dry season. Grapevine cultivars are known to differ in their drought adaptation mechanisms, but there is little knowledge on how many of them behave during a drought event and after recovering. The aim of this study is to analyze how stomatal conductance is regulated under water stress and recovery, as well as how water stress affects adjustments of water use efficiency in cultivar Corvina, Corvinone and Rondinella grafted on Kober 5BB and 140 Ruggeri rootstocks. The experiment was conducted on 4-year old vines, grown in an experimental field of Valpolicella in Verona province. The effects of water deficit and recovery after rewatering were evaluated by using thermal imaging, a potential tool for estimating plant temperature, which can be used as an indicator of stomatal closure and water deficit stress. The thermal indices were compared with measured stomatal conductance. Results of mid-morning and at noon measurements showed significant difference between cultivars for both stomatal conductance and canopy water stress index. An apparent difference between the cultivars was the highest speed of the recovery noted for Corvinone compared to Corvina and Rondinella.

Download the PDF

DOI:

Publication date: December 3, 2021

Issue: Terroir 2010

Type: Article

Authors

M.A. Bahouaoui (1), E. Sartor (1), E. Rovetta (1), G.B. Tornielli (1), M. Boselli (1), G. Ferrara (2)

(1) Department of Science and Technology of the Vine and Wine of University of Verona, Via della Pieve 70, 37129 San Floriano (VR) – Italy
(2) Department of science of Plant Production of the University of Bari, Via Amendola, 165/a – 70126 Bari – Italy

Contact the author

Keywords

Stomatal conductance, photosynthesis, water stress, recovery, grapevines

Tags

IVES Conference Series | Terroir 2010

Citation

Related articles…

Increasing microalgae biomass feedstock by valorizing wine gaseous and liquid residues

Global warming due to greenhouse gases (GHG) has become a serious worldwide concern. The new EU Green Deal aims t0 achieve GHG emissions reduction by at least 55% by 2030 and a climate neutral EU economy by 2050. The deal strongly encourages GHG reducing measures at local, national and European levels. The REDWine project will demonstrate the technical, economic and environmental feasibility of reducing by, at least, 31% of the CO2 eq. emissions produced in the winery industry value chain by utilizing biogenic fermentation CO2 for microalgae biomass production

Read More

Emerging pest pressures in viticulture: a brief review of Argyrotaenia Ljungiana in Eastern Europe

As viticulture faces increasing threats from emerging pests, understanding and dealing with new infestations is crucial.

Read More

UHPLC-HRMS analysis for the evaluation of formation and degradation of polysulfides in wine 

The contribution of sulfur compounds to wine aroma has been studied for several years, as their role can be either positive, contributing to the fruitiness and typicity of some white wines like Sauvignon blanc, or negative when related to off-flavours caused by H2S.

Read More

Does the sustainability perception depend on the Terroir?

The main scope of this research has been to investigate what values are attributed to the concept of “sustainability” by the wine producers of two different wine territories of Piedmont; the terroir of the Barolo DOCG and the the terroir of the Gavi DOCG. The research wants to emphasize how much the characteristic elements of each terroir influence the perception of the concept of sustainability among producers.

Read More

CIEDE2000 colour difference value as a parameter for tracing the ageing process on wood aged spirits

It is quite common nowadays to carry out analyses which allow to control the ageing of spirits that are aged in wood casks. Many control parameters have been previously studied, such as the concentration of different phenolic compounds or the Total Polyphenol Index, in order to better understand the ageing process of wood aged spirits. On the other hand, it is frequent to analyse as a physical parameter the colour of those spirit samples, by stating them as an array of three coordinates from various colour spaces as CIE L*a*b* or CIE L*C*H*.

Read More