terclim by ICS banner
IVES 9 IVES Conference Series 9 Winter physiology in a warmer world: Cold hardiness and deacclimation sensitivity drive variation in spring phenology

Winter physiology in a warmer world: Cold hardiness and deacclimation sensitivity drive variation in spring phenology

Abstract

As the climate warms, the focus of concern in viticulture often turns to how higher temperatures may shift growing regions, change the character of AVAs, and alter fruit quality. However, climate warming is increasing most quickly during the winter dormancy cycle, a critical and often underappreciated portion of the grapevine life cycle.  In response to decreasing temperatures and decreasing daylength, grapes initiate a series of physiological changes to enter dormancy, acquire freeze resistance, and time spring phenology such that the growing season begins after threat of frost.  We have been working to understand the connections between temperature perception and dormancy physiology in grapevine through field and growth chamber experiments.  Examining 30 different cultivars over 3 years, we have uncovered a critical link between the depth of freeze resistance, the interaction with chilling accumulation, and the eventual timing of spring budbreak. Results demonstrate that chilling accumulation and perception is conserved across diverse grapevine cultivars and the perceived difference in chill requirement for synchronous budbreak is largely driven by variation in thermal efficiency (deacclimation resistance) during ecodormancy. Phenotypic variation in maximal cold hardiness and deacclimation resistance suggest adaptive potential in different wild grape species that can be tapped for a world of erratic climate.      

DOI:

Publication date: June 13, 2024

Issue: Open GPB 2024

Type: Article

Authors

Jason P Londo1, Alisson P Kovaleski2

1Cornell University
2University of Wisconsin-Madison

Contact the author*

Keywords

Cold Hardiness, winter survival, deacclimation, dormancy, phenology

Tags

IVES Conference Series | Open GPB | Open GPB 2024

Citation

Related articles…

Prediction of astringency in red wine using tribology approach to study in-mouth perception

AIM Astringency is described as a ‘dry puckering‐like sensation’ following consumption of tannins1 that affect consumer preference of foods and beverages, including red wine2. To improve the understanding of astringency, which is a complex interaction due to multiple mechanisms occurring simultaneously, further studies are needed. In this view, oral tribology is considered a useful technique for beverage study to evaluate the thin-film lubrication properties of saliva resulting in oral friction‐related sensations3. The aim of this study was to examine the film behavior of selected protein-based fluids under controlled friction conditions, to understand polyphenol-protein interactions involved in the sensation of astringency.

Guyot or pergola for dehydration of Rondinella grape

Pergola veronese is the most important vine training system in Valpolicella area but Guyot in the last decades is diffusing. Rondinella is one of the three most important varieties

Influenza di alcuni aspetti ambientali sul contenuto di stilbeni nel vino nell’area della DOC “Sangiovese di Romagna” (Italia)

The ambition of the zonation of the Doc “Sangiovese di Romagna” is described as 25 siti sperimentali, aventi diversa origine geologica, in cui è stato individuato un vigneto omogeneo per la determinazione dei principali parametri viticoli ed enologici. In seguito è stato analizzato il contentto di stilbeni nei vini al fine di indepth il legame con le charatteristiche geopedologiche. The studio describes the positive relationship between the altitude and the content of the trans -piceide nelle province di Forlì and Ravenna and of the trans -resveratrolo a Ravenna. I suoli con maggiore calcare attivo hanno fornito vini più ricchi in stilbeni.

Applying artificial intelligence for improving grape yield estimation: A case study of wine and table grapes in South Africa

Accurate grape yield estimation is essential for effective vineyard management, crop planning, and resource allocation. Traditional methods often involve time-consuming and labour-intensive processes, which may introduce errors due to the large size and inherent spatial variability of the vineyard blocks.

Closing the carbon loop: evaluating the potential of grapevine-derived biochar as a soil conditioner in warm climate vineyards

Significant increases in anthropogenic carbon dioxide (CO2) emissions due to combustion of fossil fuels and intensive land management practices that release CO2 into the atmosphere have resulted in higher air temperatures due to the greenhouse effect.