terclim by ICS banner
IVES 9 IVES Conference Series 9 Estimation of stomatal conductance and chlorophyll fluorescence in Croatian grapevine germplasm under water deficit    

Estimation of stomatal conductance and chlorophyll fluorescence in Croatian grapevine germplasm under water deficit    

Abstract

Water deficit profoundly impacts the quality of grapes and results in considerable reductions in crop yield. First symptoms manifest with reduced stomatal conductance and transpiration, accompanied by the wilting of apical leaves and tendrils. So far, there is no available data on the water stress response in Croatian grapevine germplasm. Therefore, objective of this study was to determine influence of genotype and treatment on stomatal conductance (gsw), transpiration (E), electron transport rate (ETR), and quantum efficiency in light (PhiPS2). In this research we observed the initial response to water deficit of 84 unique genotypes, 70 Vitis vinifera subsp. vinifera and 14 Vitis vinifera subsp. sylvestris accessions. The experiment was conducted in a greenhouse in both 2022 and 2023, involving self-rooted cuttings exposed to water stress and compared to a well-watered control. Multifactorial analysis of variance was used to examine the effects of genotype, treatment, replicate, date and time of measurement on gsw, E, ETR, PhiPS2. In both years gsw and E were significantly influenced by all parameters except replicate, while ETR wasn’t significantly influenced by treatment in second year and PhiPS2 in first year. Due to the observed significance of the interaction between genotype and treatment across all parameters in both years, we employed the pairwise comparisons of treatment levels within each genotype with Bonferroni correction. In this study, a non-destructive high-throughput method for rapid screening of the initial physiological response to water deficit is briefly presented, in which the grapevine genotypes studied are divided into two distinct groups.

DOI:

Publication date: June 13, 2024

Issue: Open GPB 2024

Type: Poster

Authors

Luka Marinov1*, Domagoj Ivan Žeravica2, Katarina Lukšić1, Ana Mucalo1, Maja Ozretić Zoković1, Toni Safner3, Goran Zdunić1

1 Institute for Adriatic Crops and Karst Reclamation, Split, Croatia
2 University of Dubrovnik, Dubrovnik, Croatia
3 University of Zagreb, Faculty of Agriculture, Zagreb, Croatia

Contact the author*

Keywords

water stress, genotype, stomatal conductance, sylvestris, vinifera

Tags

IVES Conference Series | Open GPB | Open GPB 2024

Citation

Related articles…

Modelisation of the microclimatical parameters for the viticultural ”terroirs”characterization of “Canton de Vaud” (Switzerland)

Dans le cadre d’une recherche sur les terroirs viticoles du canton de Vaud – Suisse, un modèle du microclimat intégrant température, relief, éclairement et pluviométrie a été conçu.

Anthropogenic factors in modulations of fungal populations from grapes to wines and their repercussions on wine characteristics

The effects of anthropogenic activities on vineyard (different plant protections) and in winery
(pressing/clarification step, addition of sulfur dioxide) on fungal populations from grape to wine were studied. The studied anthropogenic activities modify the fungal diversity. Thus, lower biodiversity of grapes from organic modality was measured for the three vintages considered compared to biodiversity from ecophyto modality and conventional modality. The pressing / clarification steps strongly modify fungal populations and the influence of the winery flora is highlighted.

The role and quantification of vitamins in wine: what do we know?

AIM: Vitamins are essential compounds to numerous organisms, including yeasts, and appear highly significant during winemaking processes.

Eliminating Brettanomyces and lactic acid bacteria in wine: the potential of Ultra-High Pressure Homogenization (UHPH)

Ultra-High Pressure Homogenization (UHPH) is an innovative technology that can be seamlessly integrated at various stages of winemaking. Its application helps minimize or even eliminate the need for sulphites and other antimicrobial or antioxidant treatments, offering a faster and more sustainable alternative.

Terroir zoning in appellation campo de borja (northeast Spain): Preliminary results

The components and methodology for characterization of the terroir have been described by Gómez-Miguel & Sotés (1993-2014, 2003) and Gómez-Miguel (2011) taking into account the full range of environmental factors (i.e: climate, lithology, vegetation, topography, soils, altitude, etc.), landscape variables (derived from photo-interpretation and a digital elevation model), and specific variables to the country’s viticulture (i.e: size and distribution of the vineyards, varieties, phenology, productivity, quality, designation regulations, etc.).