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…

The pyramidal organization of AOC in France: a process of identification and valorisation of terroirs

English version: Result of their history, some famous French wine countries such as Burgundy, Bordeaux or Alsace, have a hierarchical organization of their Appellations of Controlled Origin (AOC): AOC regional, communal, Premier Cru, Grand Cru.

Read More

Influence of berry maturity, maceration time and wine maturation on the polyphenols and sensory characteristics of pinot noir and Cabernet-Sauvignon

AIM: Combined investigation of the influence of berry maturity, maceration time and wine maturation on the changes in polyphenols and sensory characteristics of Pinot noir and Cabernet-Sauvignon.

Read More

The influence of RNAi-expressing rootstocks in controlling grey mold on grapevine cultivars

Worldwide, with an average of 6.7 million cultivated hectares, of which exclusively 51% in Europe (faostat, 2021), the production of table and wine grapes is a leading sector, with continued growth in Europe in the area devoted to vine cultivation. during the growing season, most of the plant organs can be susceptible to several fungal and oomycete diseases, leading to important economic losses and causing detrimental effects on fruit quality. the increasingly scarce availability of fungicidal products, often also related to their relative impact on the environment, coupled with the emergence of resistance in the pathogen to these products, make defence increasingly challenging.

Read More

USE OF COLD LIQUID STABULATION AS AN OENOLOGICAL TECHNIQUE IN WHITE WINEMAKING: EFFECTS ON PHENOLIC, AROMATIC AND SENSORIAL COMPOSITION

The application of different winemaking techniques helps to modify the basic parameters, phenolic profile, and aroma components influencing the final wine quality. In particular, pre-fermentative processes aim to increase the extraction and preservation of grape native compounds. Among them, cold liquid stabulation (macération sur bourbes) consists in maintaining the grape juice on its lees, in suspended condition at low temperature (0-8 °C) for a variable time (generally from 7 to 21 days). The aim of this work is to apply the cold liquid stabulation on two Italian white grape varieties, Arneis and Cortese, to evaluate the impact on basic parameters, color, polyphenolic compounds (TPI), antioxidant power (DPPH), total polysaccharides, and free and glycosylated volatile compounds (GC-MS analysis) during and after the process.

Read More

Vitis v. corvina grapes composition and wine sensory profile as affected by different post harvest withering conditions

Context and purpose of the study – In Valpolicella area (Verona – Italy) Vitis vinifera cv. Corvina is the main wine variety to obtain, after grape withering, Amarone wine: this study was carried out in order to compare two different grape dehydration conditions with the aim of verifying the final composition of Corvina dried grapes and the organoleptic profile of corresponding Amarone wine.

Read More