GiESCO 2019 banner
IVES 9 IVES Conference Series 9 GiESCO 9 Ozone treatment: a solution to improve sanitary and physiological quality of vine plant

Ozone treatment: a solution to improve sanitary and physiological quality of vine plant

Abstract

Context and purpose of the study – The vineyard world is faced to a lot of fungal diseases. Grapevine Trunk Diseases (GTD) are some of the major. After exhibiting chronical foliar symptoms, grapevines can die by apoplexy within only few days. A range species of fungi was described to be associated with the apparition of early symptoms of GTD. It is well known that ozone dissolved into water is a powerful disinfectant with no remanence. The main goal of this study was to test the efficiency of this process on different fungal species associated with GTD in vitro and in planta conditions.

Material and methods – In vitro sanitary tests: Eighteen strains of two different species associated with GTD were selected (Phaeomoniella chlamydospora and Phaeoacremonium minimum). Ozone dissolved into water (4.5 g.m-3 according the Henry’s law) or autoclaved demineralized water (control) were applied on spore suspensions from strains. Suspensions were then plated on agar medium. Germinating spores were observed after five days. In vivo sanitary tests:Cuttings of Vitis vinifera Cabernet-Sauvignon clone 15 were drilled until the vascular channels. In each injury, plants received 20 µL of spore suspension (105 spores.mL-1) of P. minimum. Immediately after inoculation, infected wounded damages were treated with 20 µL of ozone dissolved into water (4.5 g.m-3 according the Henry’s law). The fungal development was evaluated 4, 6 and 9 weeks after inoculation by q-PCR.

Results – In vitro sanitary tests: Solution of ozone dissolved into water presented a complete sporicide effect. Indeed, no spore germinated in ozonated treatments whereas water treated controls normally developed. In vivo sanitary tests:The anti-fungal abilities of ozone treatment were secondly assessed by quantification of P. minimum DNA in woody tissues (via qPCR). Four and six weeks after inoculation, ozone treatment strongly reduced the source of inoculum present in the injury, resulting in more of 50% decrease of the number of P. minimum copies per ng of total. After nine weeks, the quantity of DNA is more important in ozone modality than in control modality. These results suggest that ozone treatment slowed down the fungal colonization via its primary sporicide effect in cutting-wounding conditions. Finally, consequences on the physiological aspect of the plant after ozone treatment should be discussed during the congress thanks to some news results.

DOI:

Publication date: September 26, 2023

Issue: GiESCO 2019

Type: Poster

Authors

Ana ROMEO OLIVAN1,ǂ, Marielle PAGÈS1, 2,*,ǂ, Coralie BRETON1, Frédéric VIOLLEAU2,3 and Alban JACQUES1

1 PPGV, INP-PURPAN, F-31076 Toulouse, France
2 Plateforme TOAsT, Université de Toulouse, INP-PURPAN, Toulouse, France
3 Laboratoire de Chimie Agro-industrielle, LCA, Université de Toulouse, INRA, 31000 Toulouse, France
ǂ These authors contributed equally to this work

Contact the author

Keywords

grapevine, fungi, ozone, disinfection, growth

Tags

GiESCO | GiESCO 2019 | IVES Conference Series

Citation

Related articles…

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.

L’effet du climat viticole sur la typicité des vins rouges: caractérisation au niveau des régions viticoles Ibéro-Américaines

Il n’existe presque pas d’études qui caractérisent l’effet du climat viticole sur la typicité des vins en considérant les différents types de climats à l’échelle mondiale. Cette étude fait partie d’un projet CYTED de zonage vitivinicole. L’objectif a été de caractériser l’effet du climat viticole sur la typicité des vins sur une macro région viticole du monde.

Are Farm to fork strategy goals reasonable and achievable? State of the art of Península de Setubal’s winegrowers

The European Union’s “farm to fork” strategy sets out several objectives to be achieved by farmers, who, among others, relate to increasing biodiversity, protecting soils and reducing the use of pesticides. At a time when the amendments to the national plans of Sustainable Use of pesticides are being discussed, it is important to understand what the Setúbal Peninsula region status is.

Preliminary study of extraction of polysaccharides from pomace by high powered ultrasonic combined with enzymes

Red grape pomace can be an important source of polysaccharides, but currently they are little studied and even less with viable and environmental extraction processes (green extraction). These green techniques must be able to break the cell wall so that the compounds contained in the cells, including polysaccharides, are released and can have a great influence on extraction yields, the chemical structure of polysaccharides and applications in wines. Amongst the emerging green techniques most applied to the extraction of bioactive compounds, such as polysaccharides, high-power ultrasound (US) and enzyme-assisted extraction stand out.

Influenza di alcuni aspetti ambientali sul contenuto di stilbeni nel vino nell’area della DOC “Sangiovese di Romagna” (Italia)

The ambition of the zonation of the Doc “Sangiovese di Romagna” is described as 25 siti sperimentali, aventi diversa origine geologica, in cui è stato individuato un vigneto omogeneo per la determinazione dei principali parametri viticoli ed enologici. In seguito è stato analizzato il contentto di stilbeni nei vini al fine di indepth il legame con le charatteristiche geopedologiche. The studio describes the positive relationship between the altitude and the content of the trans -piceide nelle province di Forlì and Ravenna and of the trans -resveratrolo a Ravenna. I suoli con maggiore calcare attivo hanno fornito vini più ricchi in stilbeni.