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.

Download the abstract

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…

Facteurs physiques et biologiques affectant la production viticole et vinicole de la région avec dénomination d’origine “Condado de Huelva” (SW d’Espagne)

Les facteurs physiques et biologiques du milieu naturel affectant la production viticole de la R.D.O. “Condado de Huelva” et quelques relations les concernant sont étudiés dans les systèmes de la production vinicole ; le bon fonctionnement du Vignoble ayant besoin par ailleurs, du concours d’autres facteurs (Reynier, 1989 ; Paneque et al., 1996, a,b).

Read More

CHARACTERIZATION AND IDENTIFICATION OF YEAST BIOACTIVE PEPTIDES RELEASED DURING FERMENTATION AND AUTOLYSIS IN MODEL WINE

Aging wine on lees is a consolidated practice during which some yeast components (e.g., polysaccharides,
proteins, peptides) are released and solubilized in wine thus, affecting its stability and quality.
Apart from the widely studied mannoproteins, the role of other yeast components in modulating wine
characteristics is still scarce. Wine peptides have been studied for their contribution to taste, antioxidant,
and antihypertensive potentials. However, the peptides detected in wine can be influenced by the
interaction between yeasts and grape components.

Read More

Evaluating nature-based solutions for under trellis soil management: effectiveness and impacts on vine performance compared to conventional strategies

Soil management plays a key role in climate change adaptation.

Read More

New highlights of polyphenols from red wine to counteract ocular degenerative diseases

More recently, studies have shown that polyphenols could also prevent or improve vision in patients with ocular diseases and especially age-related macular degeneration (AMD) which is an eye disease characterized by damage to the central part of the retina, the macula, and that affects millions of people worldwide. Despite therapeutic advances thanks to the use of anti-vascular endothelial growth factor (VEGF), many resistance mechanisms have been found to accentuate the visual deficit.

Read More

Hyperspectral imaging and machine learning for monitoring grapevine physiology

Rootstocks are gaining importance in viticulture as a strategy to combat abiotic challenges, as well as enhancing scion physiology and attributes. Therefore, understanding how the rootstock affects photosynthesis is insightful for genetic improvement of either genotype in the grafted grapevines. Photosynthetic parameters such as maximum rate of carboxylation of RuBP (Vcmax) and the maximum rate of electron transport driving RuBP regeneration (Jmax) have been identified as ideal targets for breeding and genetic studies. However, techniques used to directly measure these photosynthetic parameters are limited to the single leaf level and are time-consuming measurements.

Read More