GiESCO 2019 banner
IVES 9 IVES Conference Series 9 GiESCO 9 GiESCO 2019 9 Effect of kaolin foliar application on grape cultivar Assyrtiko (Vitis vinifera L.) under vineyard conditions

Effect of kaolin foliar application on grape cultivar Assyrtiko (Vitis vinifera L.) under vineyard conditions

Abstract

Context and purpose of the study – In the context of climate change and for the sustainable exploitation of Mediterranean vineyards, it is necessary to use new strategies to adapt to the new climatic conditions. High temperatures and radiation along with the increasing CO2 concentration in the atmosphere affect the maturity process, the technological maturity, as well as the physiology of the grapevine. The aim of the present study was to investigate the effects of kaolin foliar application on water relations, photosynthesis and berry composition of grape cultivar Assyrtiko, under drought conditions in Santorini and with two different training systems. 

Material and methods – The experiment took place in the cultivation season 2017-2018 in Santorini. There were two vineyards, one with the traditional training system of Santorini ‘kouloures’, and one with a unilateral Guyot training system, on vines of grape cultivar Assyrtiko. In both vineyards, there were vines that underwent kaolin application and control vines.  

Results – The use of kaolin reduced the leaf temperature in both training systems by 6.2 % for the unilateral Guyot system and by 6.9% for the traditional system. Chlorophyll concentration was higher after kaolin application for both training systems. Regarding the water potential, the kaolin application reduced water stress in both training systems, with significant difference observed in the unilateral Guyot system. Vine transpiration did not present statistically significant difference after the kaolin application. The photosynthesis of the vines after kaolin application was lower in comparison with the control vines, while in the case of stomatal conductance, there were no statistically significant differences observed. Kaolin delayed the maturation of the grapes in the case of the traditional training system. Water use efficiency was lower in the treatments with kaolin application compared to control vines. Regarding the other mechanical properties of the grapes and analyses of the must, there were no significant differences observed between the treatments. Therefore, the application of kaolin can be an effective and economical solution for the water saving of the vines in dry conditions, while at the same time it can improve the physiology of the plant and preserve the qualitative and quantitative characters of the grapes

Download the PDF

DOI:

Publication date: June 18, 2020

Issue: GiESCO 2019

Type: Poster

Authors

Eustratios Guillaume XYRAFIS1, Maritina STAVRAKAKI1, Ioannis DASKALAKIS1, Konstantinos TELLIS2, Despoina BOUZA1, Katerina BINIARI1*

(1) Laboratory of Viticulture, Agricultural University of Athens, Iera Odos 75, 11855, Athens, Greece
(2) Domaine Sigalas, Baxes, Oia Santorini 84702, Santorini, Greece

Contact the author

Keywords

Kaolin, Santorini, Vitis vinifera L., water stress, water use efficiency

Tags

GiESCO | GiESCO 2019 | IVES Conference Series

Citation

Related articles…

Evaluation of the agronomic performance of cvs. Syrah and tempranillo when grafted on a new series of rootstocks developed in spain

The choice of an adequate rootstock is a key tool to improve the performance of grapevine varieties in different ‘terroirs’, as rootstocks confer adaptation to soil characteristics
Read More

Influence of climate change conditions (elevated CO2 and temperature) on the grape composition of five tempranillo (Vitis vinifera L.) Somatic variants

The current levels of greenhouse gas emissions are expecting to provoke a change on the environmental conditions which, among others, will include a rise of global mean surface temperature and an increment of atmospheric CO2 levels (IPCC, 2014), known as climate change. The response of grapevine (Vitis vinifera L.), one of the most important crops in Europe, from both a cultural and economic point of view, is not completely understood yet and the studies considering the interaction between factors are scarce. Besides, the potential variety of responses among somatic variants needs to be studied in order to be exploited in the avoidance of undesired traits linked to climate change (Carbonell‐Bejerano et al., 2015).

Read More

Towards the definition of a detailed transcriptomic map of grape berry development

In the last years the application of genomic tools to the analysis of gene expression during grape berry development generated a huge amount of transcriptomic data

Read More

Comparative study of qualitative and quantitative characters of grape cultivar ‘Mavrodafni’ (Vitis vinifera L.) grown in different regions of the PDO Mavrodafni Patras

‘Mavrodafni’ (Vitis vinifera L.) is considered one of the oldest grapevine cultivars indigenous to the Greek vineyard, with western Peloponnese being its primary center of cultivation. ‘Renio’ is considered to be either a variant of ‘Mavrodafni’ or an altogether different cultivar. Both ‘Mavrodafni’ and ‘Renio’ can be found in the vineyards of the centers of cultivation, since ‘Renio’ is considered to be more productive compared to ‘Mavrodafni’, and for this reason, it has gradually replaced ‘Mavrodafni’ from cultivation over the course of time. The aim of the present study was to assay the mechanical properties, the polyphenolic content and the antioxidant capacity of skin extracts and must of berries coming from ‘Mavrodafni’ and ‘Renio’, cultivated in the same vineyard as well as in the different regions of cultivation of the PDO Mavrodafni Patras.

Read More

To what extent does vine balance actually drive fruit composition?

Context and purpose of the study ‐ Vine balance is a concept describing the relationship between carbon assimilation (usually estimated using a measure of vine vigour, e.g. pruning weight) and its utilisation for fruit production (usually estimated using harvest yield). Manipulating vine balance through leaf area or crop load adjustments affects the proportion of the vine’s total carbohydrate production required to mature the fruit. It is commonly considered that composition of the berry, and resulting wine, is strongly affected by vine balance.

Read More