terclim by ICS banner
IVES 9 IVES Conference Series 9 International Congress on Grapevine and Wine Sciences 9 2ICGWS-2023 9 The tolerance of grapevine rootstocks to water deficit is related to root morphology and xylem anatomy traits 

The tolerance of grapevine rootstocks to water deficit is related to root morphology and xylem anatomy traits 

Abstract

Climate change is altering water balances, thereby compromising water availability for crops. In grapevine, the strategic selection of genotypes more tolerant to soil water deficit can improve the resilience of the vineyard under this scenario. Previous studies demonstrated that root anatomical and morphological traits determine vine performance under water deficit conditions. Therefore, 13 ungrafted rootstock genotypes, 6 commercial (420 A, 41 B, Evex 13-5, Fercal, 140 Ru y 110 R), and 7 from new breeding programs (RG2, RG3, RG4, RG7, RG8, RG9 and RM2) were evaluated in pots during 2021 and 2022. Well-watered plants were subjected to progressive water deficit and subsequent recovery.  Plant water status and hydraulic conductance was determined under different conditions of water availability and, at the end of the experiment, the anatomy of the vascular system and root morphology were characterized by using optical microscopy and WinRHIZO software respectively. The results showed a great anatomical diversity of xylem among the genotypes studied. The greater proportion of fine roots and the smaller diameter of the xylem vessels seem to be key traits in the tolerance to severe stress and the recovery capacity. The genotypes 420 A and RM2 (common parent V. Berlandieri), showed greater tolerance to severe stress and recovery capacity. On the other hand, the new RG series did not show clear advantages of adaptation to stress compared to commercial rootstocks. These findings improve the understanding of the role of root anatomy and morphology in vine responses to water deficit providing a basis for future breeding programs.

DOI:

Publication date: October 5, 2023

Issue: ICGWS 2023

Type: Article

Authors

Flor L.1*, Buesa I.1,2, Sabater A.1, Gómez I.1, Medrano H.1,2, Escalona JM 1,2

1Agro-environmental and Water Economy Research Institute-University of Balearic Islands (INAGEA-UIB)
2Research group of plant biology under Mediterranean Conditions – University of Balearic Islands (PlantMed-UIB)

Contact the author*

Keywords

hydraulic conductance, plant water status, drought, climate change, xylem vessels, root diameter

Tags

2ICGWS | ICGWS | ICGWS 2023 | IVES Conference Series

Citation

Related articles…

Development of a new method for detecting acetic acid bacteria in wine

The presence of acetic acid bacteria in wine can lead to the appearance of acetic acid at concentrations above the perception threshold, causing the wine rejection by the consumer. During the winemaking process, avoiding the presence of acetic acid bacteria is very difficult, as there is always a residual population accompanying the wine[1], and the problem arises with the significant development of these microorganisms that metabolizes large amounts of acetic acid.
The concern of wineries to control the presence of acetic acid bacteria in wines during their conservation is due to the absence of simple and effective analyses that allow the detection of these microorganisms in the initial stages.

Detoxification capacities of heavy metals and pesticides by yeasts 

Winegrowing is still characterized by the extensive use of chemical fertilizers and plant protection products, despite strong recommendations to limit these practices. A part of these xenobiotics and metals are then found in grape juice and wine, causing a major health concern, as well as negatively affecting the fermentation process. In recent years, there has been renewed interest in non-Saccharomyces yeasts. These species have a wide phenotypic diversity, which would be exploited to broaden the aromatic palette of wines.

Metabolomic insights into wine’s sensory identity: unveiling climate-driven changes in aroma composition

Wine, a sensitive and intricate agricultural product, is being affected by climate change, which accelerates grapevine phenological stages and alters grape composition and ripening. This influences the synthesis of key aroma compounds, shaping wine’s sensory attributes [1]. The complex aroma profile, resulting from compound interactions, presents a metabolomics challenge to identify these indicators and their environmental change responses, which is being addressed using diverse analytical techniques.

Effect of ultraviolet B radiation on pathogenic molds of grapes

The fungicidal effect of UV-C radiation (100-280 nm wavelength) is well known, but its applicability for the control of pathogenic molds of grapes is conditioned by its effect on the host and by the risks inherent in its handling[1].
As an alternative, the effect in vitro of UV-B radiation (280-315 nm) on the main pathogenic molds of grapes has been studied: Botrytis cinerea, Aspergillus niger, Penicillium expansum and Rhizopus stolonifer.

Impact of climate on berry weight dynamics of a wide range of Vitis vinifera cultivars 

In order to study the impact of climate change on Bordeaux grape varieties and to assess the behavior of candidate grape varieties potentially better adapted to the new climatic conditions, an experimental vineyard composed of 52 grape varieties was planted in 2009 at the INRAE Bordeaux Aquitaine center[1]. Among the many parameters studied since 2012, berry weight for each variety was measured weekly from mid-veraison to maturity, with four independent replicates. The kinetics obtained allowed to study berry growth, a key parameter in grape composition and yield.