terclim by ICS banner
IVES 9 IVES Conference Series 9 Nitrogen uptake, translocation and YAN in berries upon water deficit in grapevines with contrasting stomatal sensitivity

Nitrogen uptake, translocation and YAN in berries upon water deficit in grapevines with contrasting stomatal sensitivity

Abstract

Nitrogen (N2) is critical in grape berries, especially in organic wine making. After intake, N2 follows various metabolic and allocation routes and, from veraison, partly reallocates into berries. Water deficit affects the N2 nutrition due to a poor diffusion in soil solution and vascular mobilisation. Also, affects photosynthesis and the energy needed for metabolism, whose extent would depend on the stomatal sensitivity of the plant. We have assessed the effect of a moderate water deficit from pea size, in 3 years old field grown potted plants of Chardonnay (CH) and Cabernet Sauvignon (CS), differing in stomatal sensitivity, on the N2 status of plant parts. Water deficit reduced photosynthesis, leaf area and fresh and dry plant mass along the season, but up to a higher extent in CS. Vcmax, tightly linked with Rubisco, an important N2 sink in leaves, was strongly reduced after water deficit in both varieties, even though the total leaf N2 at harvest was only reduced in CS under deficit. The yeast assimilable nitrogen in berries, on the other hand, was not affected at harvest, but only after the water deficit was imposed in CS, mainly accountable for ammonium, not primary amino acids. Yet, arginine, the most abundant amino acid in CH was affected by water deficit. N2 allocation to berries is highly favoured, despite the reduced capacity for N2 uptake as inferred from the reduced transcript abundance for N2 transporters in active roots. Further discussion will be made based on N2 transporters in plant parts.

DOI:

Publication date: June 13, 2024

Issue: Open GPB 2024

Type: Poster

Authors

Claudio Pastenes1*, Andrea Ávila-Valdés1, Álvaro Peña-Neira1, Carlos Pérez1, Benjamín Rosales1, Marco Garrido1, Reinaldo Campos1, Carol Leiva1, José Ignacio Covarrubias1

1 Affliliation 1 Universidad de Chile, Facultad de Ciencias Agronómicas

Contact the author*

Keywords

nitrogen intake, nitrogen transporters, photosynthesis, water deficit, YAN

Tags

IVES Conference Series | Open GPB | Open GPB 2024

Citation

Related articles…

Characterization of Brettanomyces bruxellensis biofilm, a resistance strategy to persist in wine-related environments

AIM: Biofilm is a resistance mechanism deployed by microorganisms to adapt to stresses, leading to their persistence in the environment. In the case of Brettanomyces bruxellensis, a wine spoilage yeast, knowledge about its capacity to form biofilm remains limited although this potential strategy could explain its recurring presence in cellars.

Application of regenerative agriculture to viticulture: The REVINE project

Conventional viticulture improved the quality of production, but the economic costs can be unsustainable. Today, producers need to consider consumers’ demands for healthy, eco-friendly products. Institutions promote sustainable agriculture, with regenerative agriculture being the latest generation of methodologies focused on recovering losses and ensuring future sustainability. The revine project studies regenerative agricultural technology applied in mediterranean countries to provide precise indications for soil processing and effective vineyard treatments.

Étude de l’adaptation des cépages Muscat à petits grains et Muscat d’Alexandrie dans l’A.O.C. Muscat de Rivesaltes

L’A.O.C. Muscat de Rivesaltes prévoit l’utilisation de 2 cépages Muscats : le Muscat à petits grains (M.P.G) et le Muscat d’Alexandrie (M.A).

Climate change impact study based on grapevine phenology modelling

In this work we present a joint model of calculation the budbreak and full bloom starting dates which considers the heat sums and allows reliable estimations for five white wine grape varieties

How to develop strategies of adaptation to climate change based on a foresight exercise?

Prospective studies raise a real intellectual interest for those who contribute to them or take cognizance of it. But they are often considered too difficult to operationalize