Macrowine 2021
IVES 9 IVES Conference Series 9 Application of plant growth regulators on Vitis vinifera L var. Mouchtaro affect berry quality characteristics & associated microbial communities

Application of plant growth regulators on Vitis vinifera L var. Mouchtaro affect berry quality characteristics & associated microbial communities

Abstract

The phenolic profile of the red grapevine varieties berries is a key quality factor and several techniques have been applied to improve it (Perez-Lamela et al., 2007; Singh SK and Sharma, 2010). The last decade the application of resistance elicitors and phytohormones is an innovative viticultural technique (Paladines-Quezada et al., 2021; Alenazi et al., 2019).In the present study, leaves and berries of a Greek red indigenous variety (Mouhtaro) sprayed with two elicitors, benzothiadiazole and chitosan and a plant hormone abscisic acid, during veraison. Physicochemical and phenolic characteristics of the berries and microbial communities of carposphere were analyzed during harvest.Differences in the microbial communities were observed after the application of the plant activators. CHT treatment increased the abundance of the beneficial lactic acid bacteria while the ABA treatment decreased the presence of spoilage fungi on the carposphere. Treatments differentiate total phenolics, anthocyanins and in the chemical characteristics of grape must with chitosan treated grapes had increased anthocyanins and skin-derived phenolics that correlated positively with the microbial taxa that was discriminant by LefSe analysis.In the present research, we investigated the effect of alternative environmentally friendly compounds on grape berry quality characteristics, and how the carposhere communities could be influenced by them, contributing to the establishment of more sustainable viticulture.

DOI:

Publication date: September 3, 2021

Issue: Macrowine 2021

Type: Article

Authors

Myrto Tsiknia, Nikolaos KONTOUDAKIS1, Maria DIMOPOULOU2, Yorgos KOTSERIDIS1

Soil Science and Agricultural Chemistry Lab, Department of Natural Resources and Agricultural Engineering, Agricultural University of Athens, Athens, Greece,Dimitrios-Evangelos MILIORDOS1;

1 Agricultural University of Athens, Department of Food Science and Human Nutrition, Laboratory of Enology and Alcoholic Drinks, Athens
2 Department of Wine, Vine, and Beverage Sciences, School of Food Science, University of West Attica, Athens, Greece

Contact the author

Keywords

Vitis vinifera, mouhtaro, resistance elicitors, plant hormones, grapevine microbiome, benzothiadiazole, chitozan, abscisic acid

Citation

Related articles…

Projected impacts of climate change on viticulture over France wine-regions using downscalled CMIP6 multi-model data

Winegrape is a crop for which the quality and the identity of the final product depends strongly on the
climatic conditions of the year. By impacting production systems and the way in which wines are
developed, climate change represents a major challenge for the wine industry (Ollat et al., 2021).

Read More

An excessive leaf-fruit ratio reduces the yeast assimilable nitrogen in the must

Yeast assimilable nitrogen (YAN) in the grape must is a key variable for wine quality as a source of aroma precursors. In a situation of YAN deficiency, a foliar urea application upon the vine at veraison enhances YAN concentration and facilitates must fermentation. In 2013, Agroscope investigated the impact of leaf-fruit ratio on the nitrogen (N) assimilation and partitioning in grapevine Vitis vinifera cv. Chasselas following foliar-urea application with the aim of improving its efficiency on the YAN concentration.

Read More

Impact of press fractioning on current and phenolic compositions of Pinot noir and Pinot meunier wines

In the Champagne’s region, a complete press cycle is a series of pressure increases (squeezes) and decreases (returns). After alcoholic fermentation, the two wines (the “cuvee” and the “tailles”) obtained from grape juice fractions exhibit strong differences for numerous characteristics. Nevertheless, there is no study of the impact of the press cycle, followed after each pressure increase (22-28 steps), on wine colour, current analyses and phenolic composition. So, the aim of this study (vintage 2020) was to investigate the composition changes of Pinot noir and Pinot meunier wines, produced from 22-28 grape juices isolated for each complete pressing cycle.

Read More

Role of climate on grape characteristics of “Moscato bianco” in Piemonte (Italy)

L’objectif de l’étude était de connaître le rôle du climat sur les aspects phénologiques du cépage « Moscato bianco » dans les différentes zones de production du vin Moscato d’Asti aocg en Piemonte (Italie) et ses effets sur l’époque de vendange. La représentation cartographique ( échelle 1 :25000) de exposition, altitude, climat, index

Read More

Novel protocols for variable rate vineyard management

The advent of precision viticulture (PV) has allowed to address problems related to spatial and temporal variability at the within-field scale. Nowadays, several remote and proximal sensing solutions allow description of the existing variability at different temporal and ground resolution through extremely robust soil, vigor, yield, and grape quality maps. In parallel, numerous studies have described grapevine performances within the homogeneous zones and identified soil as main driver of variability. There is a broad consensus that different vigor zones within the same plot may show differential canopy growth, yield and fruit composition, depicting diverse enological potentials and cultural needs.

Read More