terclim by ICS banner
IVES 9 IVES Conference Series 9 An evaluation of the physiological responses of young grapevines planted and maintained under water constraint 

An evaluation of the physiological responses of young grapevines planted and maintained under water constraint 

Abstract

The aim of this ongoing study is to evaluate the degree of adaptability of grapevine scion:rootstock combinations to different conditions of water constraint. Here we present results from the young vine development phase, using three scenarios of water constraint that were implemented from planting. The experimental vineyard was established in 2020 and the data presented will cover the 2021/2022 and 2022/2023 seasons. The experiment consisted of the cultivars Pinotage (PIN), Shiraz (SHI) and Cabernet Sauvignon (CAB), grafted on two rootstocks, Richter 110 (R110) and USVIT-8-7 (US87). The different scion:rootstock combinations were planted and maintained under well-watered conditions, a 50% reduction of irrigation, as well as no irrigation (dryland). Morphological, phenological, physiological and carpological measurements were gathered in addition to soil moisture measurements and environmental monitoring. Results indicated a strong negative vegetative response to the increased water constraint, especially in vines grafted on R110.  Moreover, all of the different scion:rootstock combinations reduced stomatal conductance to conserve water use under reduced irrigation conditions. Phenological progression and ripening monitoring indicated that vines advanced their phenology when they experience recurring water constraint. A lowering in total vine yield was observed in the dryland vines, though the difference was not as pronounced in the CAB combinations. A high degree of phenotypic plasticity was observed in most plant-level measurements. The data will be discussed from the perspective of evaluating adaptability to the stressors and to draw attention to the importance of experiments where the responses to water constraint are followed from planting onwards.

Download the abstract

DOI:

Publication date: June 13, 2024

Issue: Open GPB 2024

Type: Poster

Authors

Reinhard Swart1*, Anke Berry1, Stenford Matsikidze1, Philip Young1, Anscha Zietsman,Talitha Venter, Carlos Poblete-Echeverria1­­, Melané A. Vivier1

1 South African Grape and Wine Research Institute (SAGWRI), Faculty of AgriSciences, Stellenbosch University, Matieland 7602, South Africa

Contact the author*

Keywords

adaptation, viticulture, dryland, water stress, phenology

Tags

IVES Conference Series | Open GPB | Open GPB 2024

Citation

Related articles…

NAVIC–20 years of a lean management model for wine business R&D

Considering That Innovation Supports A Company’s Competitive Advantage And Drive Higher Profits (Dogru A. & Peyrette J., 2022), A Key Challenge Of Wine Companies Is Getting Practitioners To Understand That Innovation-Related Wine Research Increases The Likelihood Of Competitive Advantage, Bringing Financial Success. A Continued And Enhanced Investment In Research Is, Thus, A Prerequisite For Commercial Success In Today’s Globalized And Competitive Wine Industry (Høj P., Pretorius I.S., & Day R., 2003).

Read More

High resolution climate spatial analysis of European winegrowing regions

Climate strongly affects the geographical distribution of grape varieties, grapevine cultivation techniques and wine organoleptic properties.

Read More

Specificities of red wines without sulfites: which role for acetaldehyde and diacetyl? A compositional and sensory approach.

Sulfur dioxide is the most commonly used additive in oenology to protect wine from oxidation and microorganisms. Once added to wine SO2 is able to react with carbonyl compounds to form carbonyl bisulfites what affects their reactivity.

Read More

Comportement de différents clones de Sauvignon blanc dans certains terroirs viticoles du Friuli-Venezia Giulia (Nord-Est de l’Italie)

The worldwide reputation of Sauvignon Blanc has led technicians to ask themselves various questions about the cultivation of this variety: choice of the most suitable localities, the most effective agronomic strategies and the most appropriate wine-growing techniques, to bring out its particular aroma.

Read More

Influence of withering on valpolicella docgs grapes volatile composition

The blend of grapes used in the production of the four Valpolicella PDOs red wines, namely Valpolicella, Valpolicella Classico Superiore, Recioto della Valpolicella and Amarone della Valpolicella is quite unique, and includes two main varieties Corvina and Corvinone, and other minor varieties. To a very large extent all these grapes are only grown in the province of Verona. One of the main characteristics of Valpolicella is the use of grapes that are submitted to post-harvest withering. The aim of this study was therefore to evaluate the evolution of the free and glycosidically-bound volatile compounds in Corvina and Corvinone grapes under real production conditions.

Read More