IVAS 2022 banner
IVES 9 IVES Conference Series 9 IVAS 9 IVAS 2022 9 Impact of Japanese beetles (Popillia japonica Newman) on the chemical composition of two grape varieties grown in Italy (Nebbiolo and Erbaluce)

Impact of Japanese beetles (Popillia japonica Newman) on the chemical composition of two grape varieties grown in Italy (Nebbiolo and Erbaluce)

Abstract

The Japanese beetle, Popillia japonica Newman, is considered one of the most harmful organisms due to its ability to feed on more than 300 plant species. Symptoms indicative of adult beetles include feeding holes in host plants extending to skeletonization of leaves when population numbers are high. The vine is one of the species most affected by this beetle. However, the damaged plants, even if with difficulty, manage to recover, bringing the bunches of grapes to ripeness.

The idea of this study was to chemically characterize both grapes produced from healthy plants and those obtained from damaged plants. The purpose was to highlight how the plant was able to respond positively or negatively after its leaf surface has been heavily damaged by the beetle.

Nebbiolo (red) and Erbaluce (white) are the V. vinifera L. cultivars selected for this study. These were harvested in three different sampling points, during the last phase of berry development (vintage 2020) from the vineyard located in the Northern part of Piedmont Region. Samples collection was conducted on August 26th, September 3rd and September 9th, including both healthy and popillia-affected samples.
Both the phenolic and aromatic components were characterized in the samples for 93 analytical variables (58 VOCs, 22 phenolics, 13 anthocyanins) whose information has been subjected to statistical analysis.

To further understand the different between healthy and affected state, a PLS-DA model was built. A clear separation was observed between affected and healthy grapes independently of grape variety. From the data set used, 10 phenolics were identified with VIP score higher than 1.5, namely protocatechuic acid-O-hexoside, protocatechuic acid, hydroxy-caffeic acid dimer isomer 1, (E)-coutaric acid, (Z)-fertaric acid, procyanidin dimer, catechin, epicatechin, quercetin-3-O-glucuronide, and quercetin, which are the most significant analytes to explain the discrimination between affected and healthy grapes.

DOI:

Publication date: June 24, 2022

Issue: IVAS 2022

Type: Poster

Authors

Bordiga Matteo1, Selli Serkan2, Hasim Kelebek3, Selvindikb Onur4, Perestrelo Rosa5, Camara José S.5, Travaglia Fabiano1, Coisson Jean Daniel1 and Arlorio Marco1

1Dipartimento di Scienze del Farmaco, Università degli Studi del Piemonte Orientale “A. Avogadro”
2Department of Food Engineering, Faculty of Agriculture, Cukurova University
3Department of Food Engineering, Faculty of Engineering, Adana AlparslanTurkes Science and Technology University, Adana, Turkey
4Cukurova University Central Research Laboratory (CUMERLAB), 01330 Adana, Turkey
5CQM-UMa, Centro de Química da Madeira, Campus Universitário da Penteada, 9020-105, Funchal, Portugal

Contact the author

Keywords

Japanese beetle; Nebbiolo; Erbaluce

Tags

IVAS 2022 | IVES Conference Series

Citation

Related articles…

Modelling vine water stress during a critical period and potential yield reduction rate in European wine regions: a retrospective analysis

Most European vineyards are managed under rainfed conditions, where seasonal water deficit has become increasingly important. The flowering-veraison phenophase represents an important period for vine response to water stress, which is seldomly thoroughly evaluated. Therefore, we aim to quantify the flowering-veraison water stress levels using Crop Water Stress Indicator (CWSI) over 1986–2015 for important European wine regions, and to assess the respective potential Yield Lose Rate (YLR). Additionally, we also investigate whether an advanced flowering-veraison phase may help alleviating the water stress with improved yield. A process-based grapevine model STICS is employed, which has been extensively calibrated for flowering and veraison stages using observed data at 38 locations with 10 different grapevine varieties. Subsequently, the model is being implemented at the regional level, considering site-specific calibration results and gridded climate and soil datasets. The findings suggest wine regions with stronger flowering-veraison CWSI tend to have higher potential YLR. However, contrasting patterns are found between wine regions in France-Germany-Luxembourg and Italy-Portugal-Spain. The former tends to have slight-to-moderate drought conditions (CWSI<0.5) and a negligible-to-moderate YLR (<30%), whereas the latter possesses severe-to-extreme CWSI (>0.5) and substantial YLR (>40%). Wine regions prone to a high drought risk (CWSI>0.75) are also identified, which are concentrated in southern Mediterranean Europe. An advanced flowering-veraison phase may have benefited from cooler temperatures and a higher fraction of spring precipitation in wine regions of Italy-Portugal-Spain, resulting in alleviated CWSI and moderate reductions of YLR. For those of France-Germany-Luxembourg, this can have reduced flowering-veraison precipitation, but prevalent alleviations of YLR are also found, possibly because of shifted phase towards a cooler growing season with reduced evaporative demands. Overall, such a retrospective analysis might provide new insights towards better management of seasonal water deficit for conventionally vulnerable Mediterranean wine regions, but also for relatively cooler and wetter Central European regions.

Geopedological and climatic zoning of northern Malaga vineyards region: Fuente de Piedra, Humilladero and Mollina (southern Spain)

The vineyards placed in the municipal areas of Fuente de Piedra, Humilladero and Mollina constitute a wine-growing important area of the “Zona Norte” of the province of Málaga.

Effect of redox mediators on the activity of laccase from Botrytis cinerea against volatile phenols

Volatile phenols namely 4-ethylphenol and 4-ethylguaiacol are formed by enzymatic decarboxylation of hydroxycinnamic acids by Brettanomyces yeasts to give vinylphenols and subsequent reduction of the vinyl group to form the correspondent ethylphenols. The presence of these compounds in wine affects negatively its aromatic quality, conferring unpleasant animal and phenolic odor when present in quantities above the olfactory detection threshold [1]. Several methods have been described to remove these undesirable compounds from wines, including the use laccase enzymes [2, 3]. Due to this, the aim of this work was to evaluate the effect of several natural redox mediators on the activity of Botrytis cinerea laccase against these volatile phenols.

Ultrastructural and chemical analysis of berry skin from two Champagne grapes varieties and in relation to Botrytis cinerea susceptibility

Botrytis cinerea is a necrotrophic pathogen that causes one of the most serious diseases of the grapevine (Vitis vinifera), grey mold or Botrytis bunch rot. In Champagne, the Botrytis cinerea disease leads to considerable economic losses for winemakers and wines exhibit organoleptic defaults.

Dispersive liquid-liquid microextraction for the quantification of terpens in wines

In a highly competitive worldwide market, a current challenge for the beverage sector is to diversify the range of products and to offer wines and spirits with typicity and character.

During alcoholic fermentation, wine yeasts generate a large variety of volatile metabolites, including acetate esters, ethyl fatty acid esters, higher alcohols, volatile fatty acids and volatile sulfur compounds that contribute to the aroma profile of wine. These molecules, refered as fermentative aromas, are the most abundant volatile compounds synthetized by yeasts and the metabolic pathways involved in their formation have been well characterized. Furthermore, other molecules with a major organoleptic impact may be produced during wine fermentation including terpene derivatives. However, little information is available on the contribution of yeasts to the formation of these molecules, in particular on their ability to synthethise de novo the terpens derivatives or to produce hydrolytic enzymes involved in the release of varietal precursors.