Spatial distribution of Crimean agroecological resources as a factor of variability of the main and secondary metabolites of grapes

Evgeniy Rybalko,Elena Ostroukhova,Svetlana Levchenko,V Likhovskoi,V Kukhar,V Novello,A.M Jordão,V Volynkin

doi:10.1051/bioconf/20213901001

Evgeniy Rybalko, Elena Ostroukhova + Show 6 more

Open Access

https://doi.org/10.1051/bioconf/20213901001

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Abstract

The work is aimed at identifying the relationship between agroecological conditions and the formation of carbohydrate-acid and phenolic grape complexes. The agro-climatic parameters of 14 cv. ‘Cabernet Sauvignon’ industrial vineyards located in five wine-growing regions of Crimea have been determined using the methods of geoinformation and mathematical modeling. According to the similarity of 9 agro-climatic characteristics, the vineyards are united into 6 clusters, significantly different from each other. The dispersion of the main and secondary metabolites of grapes, as well as technological indicators based on them in the harvest from the selected clusters, has been established. According to the combined mass concentration of anthocyanins in berries, potential amount of extractable anthocyanins, anthocyanin extractability, monophenolmonooxygenase activity, glucoacidimetric index and grape ripeness index the selected vineyard clusters are discriminated with Wilks L. = 0.09 at α<0.00001. Sugar content, active acidity index, glucoacidimetric index, and grape ripeness index were found to correlate inversely with the amount of precipitation during the growing season; anthocyanin extractability correlates directly with the Huglin and Winkler indices; monophenolmonooxygenase activity with the sum of active temperatures above 10 °C, Huglin index, total precipitation per year and growing season.

Highlights

The quality of grapes and wine is greatly influenced by the agro-ecological parameters of grape growing area [1,2,3,4,5]
The data in the table indicate that the geographical location of the vineyards caused the dispersion of their agroclimatic parameters at the level of significance α 0.005
Study of regularities of agro-ecological factors influence on formation of qualitative characteristics of yield and wine is an integral condition of selection of territories for vineyard

Summary

Introduction

The quality of grapes and wine is greatly influenced by the agro-ecological parameters of grape growing area [1,2,3,4,5]. The amount of sunlight, heat supply, water regime of grape cultivation and an adaptive feature of variety to environmental influences largely predetermine the synthesis of many enzyme systems, primary and secondary metabolites of grape plant. This concerns carbohydrate-acid, phenolic and aroma-forming complexes, oxidase and hydrolytic enzymes [15,16,17,18].

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