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.

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…

EFFECT OF MICRO-OXYGENATION IN COLOR OF WINES MADE WITH TOASTED VINE-SHOOTS

The use of toasted vine-shoots (SEGs) as an enological tool is a new practice that seeks to improve wines, differentiating them and encouraging sustainable wine production. The micro-oxygenation (MOX) technique is normally combined with alternative oak products with the aim to simulate the oxygen transmission rate that takes place during the traditional barrel aging. Such new use for SEGs implies a reduction in color due to the absorption by the wood of the responsible compounds, therefore, given the known effect that MOX has shown to have on the modification of wine color, its use together with the SEGs could result in an interesting implementation with the aim to obtain final wines with more stable color over time.

Application to the wine sector of European Convention on the landscapes

The landscape is defined by the European convention of the landscape (Florence, October 20, 2000) like part of the territory as perceived by the populations, whose character results from the action of natural and/or human factors and their interrelationships. This convention is based on the contribution cultural, ecological, environmental, social of the landscapes and aims at a reinforcement of the tools of protection and valorization in particular in the agricultural policies, of regional planning and town planning. Moreover, it encourages a step of identification and qualification of the landscapes and underlines the need for developing the sensitizing and the training of the actors concerned.

Fungal resident flora of a new winery: colonization, dynamics and potential persistence capacities

Through the years, extensive studies have been conducted on fungal biodiversity during the winemaking process: from the vineyard until aging.

Adaptation and resilience of scions and rootstocks to water constraint? It’s complicated and requires an integrated approach

The ability, and the underlying mechanisms of grapevines to cope with and adapt to recurring water constraints, are the focuses of this study.

Double success of combining technical management with low pesticide inputs in the vineyard to obtain PDO wines in France

Viticulture is a major contributor to the antagonism of positive reputation and negative environmental impacts of agriculture. Vine contributes to structure landscape in the world, resulting, for example, in the delimitation of protected designations of origin (PDO). PDO vine is currently subject to the double challenge of sustainability and climate change adaptation. As vine is very sensitive to diseases and pests, vine requires a high use of pesticides to achieve its quality and yield goals. This high need for pesticides is the most important negative impact of environmental components.