terclim by ICS banner
IVES 9 IVES Conference Series 9 Freeze-thaw temperature oscillations promote increased differential gene expression during grapevine bud dormancy

Freeze-thaw temperature oscillations promote increased differential gene expression during grapevine bud dormancy

Abstract

In northern cold climate conditions, chilling requirement fulfillment in dormant grapevine buds is slowed or stopped by subzero temperatures impacting the transcriptional processes needed to complete chilling requirement. Cabernet Franc and Reisling in Geneva, NY were used to determine the impact of natural oscillating temperatures on grapevine bud transcriptional activity during light and dark periods of a two-week period in January with fluctuating diurnal winter temperatures. Cabernet Franc and Reisling bud samples were collected at 32 time points during the natural vineyard temperature cycle at 6:00 (dark), 14:00 (light) and 18:00 (dark) hours) to monitor gene expression in consecutive freezing and non-freezing temperature oscillations. Genotype, light and dark, and temperature oscillations conditions were explored. Four distinct conditions were analyzed 1) genotype difference with constant light/dark temperature conditions; 2) light vs dark with similar temperature conditions; 3) buds in light (14:00) at >0C vs <0C; 4) buds in dark (6:00 or 18:00) at >0C vs <0C; 4). Principal components analysis indicated that genotype accounted for 66% of variance and there were 1,916 and 1,559 differentially expressed genes (DEG) up and down regulated respectively, in Reisling relative to Cabernet Franc. A greater number of DEG were identified for light relative to dark samples (14:00 vs 6:00 or 18:00) and samples collected at temperatures >0C vs <0C. Gene pathway analysis showed significant positive enrichment in hormone signaling and secondary metabolite pathways in both genotypes in the >0C relative <0C temperature conditions indicating transient temperature changes enhance the metabolic activity of dormant buds.

DOI:

Publication date: June 13, 2024

Issue: Open GPB 2024

Type: Poster

Authors

Prakriti Sharma1, Jason P. Londo2, Anne Fennell1

1 South Dakota State University, Brookings, SD, USA
2 Cornell University, Geneva, NY, USA

Contact the author*

Keywords

bud dormancy, freeze, chilling fulfilment

Tags

IVES Conference Series | Open GPB | Open GPB 2024

Citation

Related articles…

Campania region grapevine patrimony: a determination of the heat requirement of 19 nearly all-native ultivars. Nine years of observations.

Nous avons peu d’informations sur les cépages cultivés dans la région de la Campania (sud de l’ltalie). En particulier insuffisant sont les études sur les besoins thermiques de tels cépages.

Vineyard’s ozone application to induce secondary metabolites accumulation in grapes and wine

In viticulture sector to find new tools for pest management has become an urgent necessity. Hence, grapevines cultivation has high production rate demand and to meet the intensive market request, a massive use of pesticides is often required. In addition to the environmental problems associated with large use of chemicals, there is an increasing number of consumers which are asking for

Evaluating South African Chenin blanc wine styles using an LC-MS screening method

Sorting Chenin blanc is one of the most important white wine cultivars in South Africa. It has received a lot of attention and accolades in the past years and more research than ever is dedicated to this versatile cultivar. According to the Chenin blanc association of South Africa, there are three recognized dry wine styles, Fresh and Fruity (FF), Rich and Ripe Unwooded
(RRU), and Rich and Ripe Wooded (RRW). They are traditionally established with the aid of expert sensory evaluation, but the cost and the (subjective) human factor are aspects to be taken into account. A more objective and possibly robust way of assessing and attributing these styles can be the use of chemical analysis.

Physicochemical behaviour of wine spirit and wine distillate aged in Sherry Casks® and Brandy casks

Brandy is a spirit drink made from “wine spirit” (<86% Alcohol by Volume – ABV; high levels of congeners and they are mainly less volatile than ethanol), it may be blended with a “wine distillate” (<94.8%ABV; low levels of congeners and these are mainly more volatile than ethanol), as long as that distillate does not exceed a maximum of 50% of the alcoholic content of the finished product[1]. Brandy must be aged for at least 6 months in oak casks with <1000L of capacity. During ageing, changes occur in colour, flavour, and aroma that improve the quality of the original distillate.

Le réseau français des partenaires de la sélection vigne : un dispositif unique au monde au service de la sauvegarde du patrimoine variétal

The French vine selection partners network is currently made up of 40 regional partners, grouped around IFV (French Institute for Vine and Wine) and INRAE (national research institute for agriculture and environment), whose missions are preservation, selection, and innovation of our varietal diversity. The originality of this device is based on a 3-level organisation: – varietal diversity preservation, with the world reference: the INRAE’s vine genetics resources centre of Vassal-Montpellier (Marseillan, France), the world’s largest ampelographic collection, which includes nearly 6 000 accessions of cultivated Vitis vinifera from 54 countries, as well as rootstocks, interspecific hybrids, wild vines (lambrusques) and wild American and Asian species.