terclim by ICS banner
IVES 9 IVES Conference Series 9 Development of a semi-controlled setup for manipulating drought and heat stress in open field trials

Development of a semi-controlled setup for manipulating drought and heat stress in open field trials

Abstract

Drought and heat stress will pose challenges for the future of viticulture and wine quality, as grapevine biological processes are pushed beyond their optimum conditions. Efforts are increasing to study and predict the effects of drought spells and heatwaves on grapevine physiology and resulting harvest quality. This calls for the development of adequate systems to induce and manipulate the required stress, especially in open field trials where conditions are more difficult to control. We present a semi-controlled system for studying drought and heat stress in grapevine in the field. The system uses automatic weighing mini-lysimeters to record whole-plant evapotranspiration throughout the growing season and manage deficit irrigation programs for drought trials, as well as infrared lamps to heat the cluster zone above ambient temperature. Drought stress was imposed at 25% soil field capacity for 9 days, during which a heat stress of 5 days was induced with infrared lamps set to 800W at 30cm from the fruiting cane. Grapevine ecophysiology was monitored throughout the experimental period. The system successfully allowed us to control grapevine evapotranspiration, lowering both leaf stomatal conductance (gsw) and midday stem water potential (Ψstem), as well as increase berry surface temperatures, with a mean increment of 3.6°C. These results provided insight into the efficacy of the system in imposing stress in the field, as well as into possible further improvements for the setup, taking into consideration the constraints of the system as well as undesired effects of changing weather during the experiment.

Download the abstract

DOI:

Publication date: June 14, 2024

Issue: Open GPB 2024

Type: Article

Authors

Jacopo Innocenti1*, Elena Farolfi1, Francesco Flagiello1, Rudi Rizzoli1, Soma Laszlo Tarnay1, Astrid Forneck1, José Carlos Herrera1

1 Institute for Viticulture and Pomology, University of Natural Resources and Life Sciences (BOKU), Konrad-Lorenz Straße, 3430, Tulln an der Donau, Austria

Contact the author*

Keywords

abiotic stress, climate change, heatwaves, phenotyping, method development

Tags

IVES Conference Series | Open GPB | Open GPB 2024

Citation

Related articles…

Using unmanned aerial vehicle with multispectral camara to efficiently and precisely monitor the incidence of downy mildew and technical maturity of beibinghong (vitis amurensis Rpru.) grapes 

Multispectral unmanned aerial vehicle (UAV) has been successfully applied in monitoring vine vegetative growth, however, there are still potential relationships between remote sensing vegetation indexes (vis) and vine condition or grape quality, so it is worthy a deeper investigation to make a better use of UAV. One of the purposes of the study is to find out vis that could denote the severity of downy mildew (DM), so that precise and differentiated control strategies would be adopted subsequently.

Read More

Aromatic profile of chardonnay – clone 809: from berry to sparkling wine in an altitude vineyard

ine consumption is linked to the aromatic profile, consumer acceptance, and reflects the viticultural and oenological practices applied, together with the study related to clones is a way to evaluate the adaptation

Read More

Mapping grapevine metabolites in response to pathogen challenge: a Mass Spectrometry Imaging approach

Every year, viticulture is facing several outbreaks caused by established diseases, such as downy mildew and grey mould, which possess different life cycles and modes of infection. To cope with these different aggressors, grapevine must recognize them and arm itself with an arsenal of defense strategies.
The regulation of secondary metabolites is one of the first reactions of plants upon pathogen challenge. Their rapid biosynthesis can highly contribute to strengthen the defense mechanisms allowing the plant to adapt, defend and survive.

Read More

Prevention of wine oxidation during barrel aging: an innovative method to measure antioxidant

Wine oxidation is a problem that affects the freshness, the aromatic profile, the colour and also the mouthfeel of the wine. It mainly concerns white wines. Oxygen interactions with wine compounds lead to the phenomena cited above that are responsible for the depreciation of these wines. Barrel aging is a crucial step in the wine process because it allows many modifications as wine enrichment, colour stabilization, clarification and also a slow oxygenation of the wine. Effects of the oak barrel have to be known to prevent oxidation of the wine. We have been interested in the main antioxidant compounds released by oak barrels to the wine and we have developed an innovative method to reach directly these antioxidant compounds at the oak stave surface.

Read More

Optimization of the ripening time of new varieties descendants of Monastrell

Given the impact of climate change on viticulture in the Region of Murcia, this paper attempts to expose the possibility of using genetic improvement as a dilemma that allows access to new descendant varieties of the autochthonous variety Monastrell crossed with varieties such as Syrah and Cabernet. Sauvignon, thus obtaining hybrids (Gebas and Myrtia). In it, the chromatic parameters and the phenolic profile of the new varieties will be compared with those obtained by the Monastrell variety at two moments during maturation (12 and 14 º Baumé), to check if the results would allow earlier harvests in these new varieties thus avoiding the decoupling between phenolic and technological maturity, while improving the quality of grapes and wines.

Read More