terclim by ICS banner
IVES 9 IVES Conference Series 9 Xylem vessel blockages in grape pedicel growing in tropical climate observed by microtomography

Xylem vessel blockages in grape pedicel growing in tropical climate observed by microtomography

Abstract

In grape berry pedicel, xylem hydraulic conductance can be impaired by blockage deposition in the lumen of xylem elements. However, the varietal difference of the interruptions has not yet been characterized. In this preliminary work, we utilized synchrotron x-ray computed microtomography experiments performed at MOGNO beamline (LNLS – Brazil) to identify possible blockage sites in natural grape pedicel xylem. For this, we imaged dehydrated pedicel’s stem portion from the Niagara Rosada variety in three different phenological stages (Pre-veraison (PreV), veraison (V) and post-veraison (PostV). The reconstructed tridimensional images with a voxel size of 1.16 µm were segmented for the identification of xylem vessel lumens. After analysing one pedicel stem per stage, we identified 658 vessels without occlusion throughout his axial plane and 41 in which we could identify possible interruptions. The percentage of interrupted vessels was higher at PostV (15,58%) when compared to V (4,09%) and PreV (3,14%). At the same time, the vessels’ volume decreased through berry ripening. This may indicate that a higher hydraulic resistance could advance in Niagara Rosada pedicel during development, reducing water flow to the berry. These findings highlight the importance of tools that allow detailed tridimensional histological analysis of intact tissues. Furthermore, we expect to calculate and understand how the water transport throughout the stem pedicel is affected by the growth/ripening changes in blockages, volume vessels and connections between xylem vessels.

Download the abstract

DOI:

Publication date: June 13, 2024

Issue: Open GPB 2024

Type: Poster

Authors

Eduardo Monteiro1, Tainara Perciliano da Silva2, Talita Rosas Ferreira3, Carla Cristina Polo1*

1 Brazilian Synchrotron Light Laboratory (LNLS), CATERETÊ Group
2 Universidade Federal de Alagoas
3 Brazilian Synchrotron Light Laboratory (LNLS), MOGNO Group

Contact the author*

Keywords

vascular occlusions, imaging analysis, grapevine pedicel

Tags

IVES Conference Series | Open GPB | Open GPB 2024

Citation

Related articles…

Effet de l’ombrage respectif des ceps et des grappes de Muscat sur leurs teneurs en composés volatils libres et glycosyles et en précurseurs d’aromes carotenoïdiques

Le Muscat de Frontignan est bien connu pour ses fortes teneurs en composés terpéniques et par l’odeur florale et fruitée que ces composés confèrent aux vins qui en sont issus (1,2).

Read More

´Vinho Verde´ wines production from differential fermentation: the role of musts sulphitation as a preservation strategy to keep the musts character

High-volume mass-market white wines production method by means of harvest-deferred fermentation from desulphited musts allows an efficient business management by avoiding the seasonality in wine sector.

Read More

Color stabilization properties of oenological tannins

The use of oenological tannins is authorized for many years by the OIV and advised for color stabilization. For this reason, winemakers look for a better understanding of tannins/anthocyanins interactions to produce deeply colored wines with great color stability during aging.

Read More

Analysis of voltammetric fingerprints of different white grape musts reveals genotype-related oxidation patterns

Must oxidation is a complex process involving multiple enzymatic transformations, including the oxidation of phenolics containing an ortho-diphenol function. The latter process has a primary influence on wine aroma characteristics and stability, due to the central role of ortho-diphenols in the non-enzymatic oxidative reactions taking place during winemaking and in finished wine. Although oxidation of must is traditionally avoided, in recent years its contribution to wine quality has been revisited, and in some cases improvements to wine aroma have been observed with the application of controlled must oxidation. Nowadays there is a great interest in the wine industry towards the identification of specific markers or patterns to characterize and classify the response of grape must to oxidation.

Read More

Impact assessment of the reverse osmosis technique in wine alcohol management

Wine authenticity and composition can be influenced by a range of membrane separation processes as reverse osmosis. In the context of climate change, the natural trend is to obtain wines with higher alcoholic concentration when classical winemaking methods are employed, and this may induce alteration of typicity of wines by masking the olfactory and taste properties. This study aimed to evaluate the influence of reverse osmosis techniques used for decrease of ethanol content on the stable isotopic ratios as markers for wine authenticity characteristics.

Read More