terclim by ICS banner
IVES 9 IVES Conference Series 9 International Congress on Grapevine and Wine Sciences 9 2ICGWS-2023 9 Induction of polyphenols in seedlings of Vitis vinifera cv. Monastrell by the application of elicitors

Induction of polyphenols in seedlings of Vitis vinifera cv. Monastrell by the application of elicitors

Abstract

Contamination problems arising from the use of pesticides in viticulture have raised concerns. One of the alternatives to reduce contamination is the use of elicitors, molecules capable of stimulating the natural defences of plants, promoting the production of phenolic compounds (PC) that offer protection against biotic and abiotic stress. Previous studies on Cabernet-Sauvignon seedlings demonstrated that foliar application of elicitors methyl jasmonate (MeJ) and benzothiadiazole (BTH) increased proteins and PC involved in grapevine defence mechanisms. However, no trials had been conducted on Monastrell seedlings, a major winegrape variety in Spain. To address this gap, a trial was conducted to assess whether MeJ and BTH application could enhance the biosynthesis of PC involved in the defense mechanisms of Monastrell seedlings. The trial involved grapevine seedlings of the Monastrell variety grown in individual pots in a controlled environment. Four treatments were administered, including water (control), MeJ, BTH, and a combination of MeJ and BTH. Leaf samples were collected at various time intervals, and the quantification of stilbenes and flavonols was carried out. The results demonstrated that the elicitor treatments positively influenced the biosynthesis of stilbenes and flavonols. The application of MeJ led to significant increases in the production of key grapevine antimicrobial stilbenes, as well as some flavonols, particularly at 18-hours after treatment. These increases remained above control levels throughout the trial. The effects of BTH and MeJ+BTH treatments were less pronounced compared to MeJ alone, with the highest increase observed at 24-hours after treatment. However, they were always greater than the control. Overall, the findings suggest that the application of MeJ and BTH has the potential to improve the defence mechanisms of Monastrell vines, reducing reliance on chemical treatments. Further research is needed to validate the elicitor activity of MeJ and BTH against common grapevine diseases.

DOI:

Publication date: October 9, 2023

Issue: ICGWS 2023

Type: Poster

Authors

D. Paladines-Quezada1*, J. D. Moreno-Olivares2, M. J. Giménez-Bañón2, J. A. Bleda-Sánchez, A. Cebrián-Pérez, J. C. Gómez-Martínez, J. I. Fernández-Fernández2 y Rocío Gil-Muñoz2

1Grupo VIENAP, Instituto de Ciencias de la Vid y del Vino (CSIC, Universidad de La Rioja, Gobierno de La Rioja), Ctra. de Burgos, km. 6, 26007 (Logroño, Spain).
2Instituto Murciano de Investigación y Desarrollo Agrario y Medioambiental (IMIDA). Ctra. La Alberca s/n, 30150 (Murcia, Spain).

Contact the author*

Keywords

stilbenes, induced resistance, elicitor, vineyard

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.

Investigation of cellulose nanofiber-based films used as a protective layer to reduce absorption of smoke phenols into wine grapes

Volatile phenols from wildfire smoke are absorbed by wine grapes, resulting in undesirable smoky and ashy sensory attributes in the affected wine.[1] Unfortunately the severity of wildfires is increasing, particularly when grapes are ripening on the vine. The unwanted flavors of the wine prompted a need for solutions to prevent the uptake of smoke compounds into wine grapes. Films using cellulose nanofibers as the coating forming matrix were developed as an innovative means to prevent smoke phenols from entering Pinot noir grapes. Different film formulations were tested by incorporating low methoxy pectin or chitosan.

Adsorption of tetraconazole by organic residues and vineyard organically-amended soils 

Spain is the country with the largest wine-producing area in the EU and its productivity is largely controlled applying fungicides. However, residues of these compounds can move and contaminate surface and groundwater. The objective of this work was to evaluate the capacity of bioadsorbents from different origin to adsorb and immobilize tetraconazole by themselves or when applied as organic soil amendment, and to prevent soil and water contamination by this fungicide. The adsorption of tetraconazole by 3 organic residues: spent mushroom substrate (SMS), green compost (GC) and vine pruning sawdust (VP), as well as by vineyard soils unamended and amended individually with these residues at 1.5% (w/w) was evaluated using the batch equilibrium technique.

The effect of ozonated water treatment on the metabolic profile and resistance of vines to Downy and powdery mildew 

Ozone is a potent oxidizing compound that quickly decomposes into oxygen without residues. Previous works reported that ozone is not only a disinfectant that directly harms the pathogens of the vine but also activates systemic defense systems in the plant by activating oxidative stress. We assume these systemic defense mechanisms are essential to the vines’ resistance to downy and powdery mildew (Plasmopara viticola & Erysiphe necator, respectively). The goals of the research are to examine the effect of spraying with ozone water on the plant’s resistance against the mentioned pathogens as well as to characterize the metabolic profile of the plants treated with ozone as well as physiological characteristics in the vines such as the level of Photosynthesis and crop yield. Vines in the vineyard sprayed with ozone water at concentrations of 2 and 4 PPM weekly and biweekly, untreated control & conventional spray. Leaves were taken from vines 2,4,7,9 and 11 days after exposure to ozone and inoculated with the pathogens.

Moderate wine consumption – part of a balanced diet or a health risk?

Consumption of wine/alcoholic beverages remains a topic of great uncertainty and controversy worldwide. The term “no safe level” dominates the media communication and policy ever since population studies in 2018 [1,2] were published, which denied the existence of a J-curve and suggested that ANY consumption of an alcoholic beverage is harmful to health. The scientific evidence accumulated during the past decades about the health benefits of moderate wine consumption, were questioned and drinking guidelines considered to be too loose.