terclim by ICS banner
IVES 9 IVES Conference Series 9 Heat-stress responses regulated via a MYB24-MYC2 complex

Heat-stress responses regulated via a MYB24-MYC2 complex

Abstract

Throughout the growing season, grapevine frequently encounters environmental challenges associated with heat and light radiation stress, especially during the ripening stage, thereby constraining the yield and quality of berries. MYB24 has been previously proposed to control light responses during late fruit ripening stages, and it has been found to require the co-factor MYC2. We have generated transcriptomic data from grapevine leaves transiently co-transformed with MYB24 and MYC2. Differential expression analysis revealed 179 up-regulated genes (URGs). Considering tissue specificity, where MYB24 is specifically and highly expressed in flowers and late-ripening berries, the expression of these URGs was explored using a previously published Berry Development Atlas gathering berry development data of cv. ‘Pinot Noir’ and ‘Cabernet Sauvignon’ in different vintages. Half of URGs highly co-express with MYB24, and MapMan analysis discloses many significantly enriched heat-related terms. Specifically, 18 co-expressed URGs were reported as heat-induced genes. Due to the DNA-binding capacity of MYB24 and MYC2, we investigated their regulatory potential by taking advantage of DAP-seq data. More than 40 of these co-expressed URGs, named as MYB24/MYC2 high confidence targets (HCTs), are bound by both TFs or one of them in their 5kb upstream region. In particular, some HCTs have been previously and functionally validated as heat regulators or heat-induced genes. Furthermore, MYB24, MYC2, and a high proportion of their HCTs were significantly induced in reanalyzed heat-treatment transcriptomic studies. To sum up, our data suggests that the MYB24-MYC2 complex plays a key role in the hierarchical regulation of heat responses.

DOI:

Publication date: June 13, 2024

Issue: Open GPB 2024

Type: Poster

Authors

Chen Zhang1, David Navarro-Paya1, José Tomás Matus1*

1 Institute for Integrative Systems Biology (I2SysBio), Universitat de València-CSIC, 46980 Paterna, Valencia, Spain

Contact the author*

Keywords

MYB24, MYC2, heat stress, transcriptomics, transcriptional regulation

Tags

IVES Conference Series | Open GPB | Open GPB 2024

Citation

Related articles…

A new winemaking technology: fermentation, aging and bottling without added additives and preservatives

Auric infinity Technology introduces three new patented products designated for fermentation, aging and bottling without added additives and preservatives that have never been used in the winemaking industry.

Comparison between satellite and ground data with UAV-based information to analyse vineyard spatio-temporal variability

Currently, the greatest challenge for vine growers is to improve the yield and quality of grapes by minimizing costs and environmental impacts. This goal can be achieved through a better knowledge of vineyard spatial variability. Traditional platforms such as airborne, satellite and unmanned aerial vehicles (UAVs) solutions are useful investigation tools for vineyard site specific management.

Territoires et zones viticoles. Aspects climatiques, pédologiques, agronomiques. Caractérisation des terroirs viticoles: une étude systémique

On assiste actuellement à l’émergence d’une demande sociale forte à l’égard de fonctions par ailleurs traditionnelles de l’agriculture, qui concernent la gestion des ressources du milieu, le maintien d’un tissu social rural, la valorisation des territoires ruraux et l’entretien des paysages.

Grape pomace, an active ingredient at the intestinal level: Updated evidence

Grape pomace (GP) is a winemaking by-product particularly rich in (poly)phenols and dietary fiber, which are the main active compounds responsible for its health-promoting effects. GP-derived products have been proposed to manage cardiovascular risk factors, including endothelial dysfunction, inflammation, hypertension, hyperglycemia, and obesity. Studies on the potential impact of GP on gut health are much more recent. However, it is suggested that, to some extent, this activity of GP as a cardiometabolic health-promoting ingredient would begin in the gastrointestinal tract as GP components (i.e., (poly)phenols and fiber) undergo extensive catabolism, mainly by the action of the intestinal microbiota, that gives rise to low-molecular-weight bioactive compounds that can be absorbed and utilized by the body.

Try the GiESCO EcoMetaEthical Charter !

The sustainability of vineyards is a major issue. The choices proposed to date have major flaws such as the lack of scientific bases or the use of dangerous products such as copper. GiESCO has published a charter of best practices for the environment and for people adapted to various environments. The use of sustainably resistant grape varieties that produce quality wines plays a central role here. Often innovative cultivation systems associated with new technologies and based on scientific bases, guarantee respect for people and the environment. These proposals are brought together in a charter which is part of a meta-ethical approach to seeking consensual measures to ensure the sustainability of vineyards.