terclim by ICS banner
IVES 9 IVES Conference Series 9 International Congress on Grapevine and Wine Sciences 9 2ICGWS-2023 9 Application of antagonistic Metschnikowia strains against Botrytis cinerea in vineyards 

Application of antagonistic Metschnikowia strains against Botrytis cinerea in vineyards 

Abstract

Less and less chemical plant protection products are approved by the E U. Plant pathogenic fungi become increasingly resistant to the active ingredients that have been around for a long time. Besides, there is a valid demand for effective products that can be applied in organic cultivation.

We examined Metschnikowia strains under laboratory conditions in order to find effective strains against B. cinerea. The antimicrobial mechanism of these yeasts is based on the competition for the ferric ions from the environment. Metschnikowia cells release the pulcherriminic acid which chelates with Fe3+, forming the pigment pulcherrimin. The ability of M. pulcherrima of depleting Fe from the growth media is correlated with it’s ability to inhibit the growth of many microorganism. We compared the strains’ ability to produce pulcherrimin and their ability to inhibit different pathogenic fungi in laboratory conditions. Pulcherrimin production was also reported in the case of other yeast species. Krause et al. (2018) described four genes (PUL1-4) forming a PULcherrimin (PUL) gene cluster present in Kluyveromyces. lactis, K. aestuarii, M. fructicola and Zygotorulaspora mraki. We have also identified the four PULgenes in our effective M. pulcherrima strains.

We conducted field studies in three vintages using a specific M. pulcherrima strains. Based on our results, we can state that we have found an effective method to protect grape against B cinerea, which can be applied both in organic cultivation and also before harvest in conventional technology.

Acknowledgements: The authors would like to thank Anita Kovács, Ilona Szilágyi and Szilvia Struba for the profession technical assistance. This research was financed by the grant 2020-1.1.2-PIACI-KFI-2020-00130

References:

1) Krause D.J., Kominek J., Opulente D.A., Shen X.X., Zhou X., Langdon Q.K., DeVirgiliof J., Hulfachora A.B., Kurtzmanf C.P., Hittinger C.T. 2018. Functional and evolutionary characterization of a secondary metabolite gene cluster in budding yeasts. Proc. Natl. Acad. Sci. 115, 11030-11035. DOI: 10.1073/pnas. 1806268115

DOI:

Publication date: October 6, 2023

Issue: ICGWS 2023

Type: Poster

Authors

Zoltán Kállai1*, Kinga Czentye1, Matthias Sipiczki1

1Department of Genetics and Applied Microbiology, Faculty of Science and Technology, University of Debrecen, H-4032 Debrecen, Hungary

Contact the author*

Keywords

crop protection, bioprotection, antagonism, Metschnikowia, Botrytis cinerea 

Tags

2ICGWS | ICGWS | ICGWS 2023 | IVES Conference Series

Citation

Related articles…

Effect of foliar application of urea and nano-urea on the cell wall of Monastrell grape skins

The foliar application of urea has been shown to be able to satisfy the specific nutritional needs of the vine as well as to increase the nitrogen composition of the must. On the other hand, the use of nanotechnology could be of great interest in viticulture as it would help to slow down the release of urea and protect it against possible degradation. Several studies indicate that cell wall synthesis and remodeling are affected by nitrogen availability.

Read More

Effect of riboflavin on the longevity of white and rosé wines

Light is a fundamental part at sales points which influences in the conservation of wines, particularly in those that are sold in transparent glass bottles such as rosé wines and increasingly white wines. The photochemical effect known as “light-struck taste” can cause changes in the aromatic characteristics of the wine. This “light-struck taste” is due to reactions triggered by the photochemical sensitivity of riboflavin (RBF).

Read More

Preliminary study of the influence of ripening on the polysaccharide content of different red grape varieties

Grape skin has a barrier and protective function in grapes. Cell wall of grape skins is mainly composed of polysaccharides such as pectins, celulloses and hemicelluloses and structural proteins. Terroir, variety and changes during ripening can affect the content of polysaccharides in grapes. The aim of this study was to evaluate the content of polysaccharides (PS) in grapes along the ripening process. Three red grape varieties were studied: Garnacha (G), Tempranillo (T) and Prieto Picudo (PP).

Read More

The weak role of organic mulches in shaping bacterial communities in grapevine

The interest in sustainable and ecologic agricultural practices in grapevine has grown significantly in recent years in the context of ecological transition. Organic mulches are treatments that support the circular economy and positively affect the soil and the plant. They are an alternative to herbicides and other conventional practices since they may influence soil moisture, erosion, structure and weed control. However, their effects on the soil and must microbiota remain unknown.

Read More

Conventional and alternative pest management strategies: a comparative proteomic study on musts

In a context of sustainable agriculture, “agroecological immunity” is an emerging concept to reduce the use of chemical pesticides to protect crops against pathogens. This alternative strategy aims to combine different levers including the use of “bio”solutions. These include biocontrol products, some of which being plant defense elicitors, as well as products authorized in organic farming such as copper or sulfur. In vineyards, depending on climate conditions, powdery and downy mildews can be devastating diseases.

Read More