Ecogeographic Conditions Dramatically Affect Trans-Resveratrol and Other Major Phenolics' Levels in Wine at a Semi-Arid Area.

Bat-Chen R. Lubin,Maria Stanevsky,Yaakov Anker,Nimrod Inbar,Ania Pinkus,Elyashiv Drori,Jonathan Cohen,Oshrit Rahimi,Oded Shoseyov

doi:10.3390/plants11050629

Bat-Chen R. Lubin, Maria Stanevsky + Show 7 more

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https://doi.org/10.3390/plants11050629

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Abstract

Grapevines are susceptible and responsive to their surrounding environment. Factors such as climate region and terroir are known to affect polyphenolic compounds in wine and therefore, its quality. The uniqueness of the terroir in Israel is the variety of soil types and the climatic conditions, ranging from Mediterranean to arid climates. Thus, understanding the effects of climate on grapevine performance in Israel may be a test case for the effect of climate change on grapevine at other areas in the future. First, we present a preliminary survey (2012–2014) in different climate zones and terroirs, which showed that trans-resveratrol concentrations in Merlot and Shiraz were high, while those of Cabernet Sauvignon were significantly lower. A further comprehensive countrywide survey (2016) of Merlot wines from 62 vineyards (53 wineries) compared several phenolic compounds’ concentrations between five areas of different climate and terroir. Results show a connection between trans-resveratrol concentrations, variety, and terroir properties. Furthermore, we show that trans-resveratrol concentrations are strongly correlated to humidity levels at springtime, precipitation, and soil permeability. This work can be considered a glimpse into the possible alterations of wine composition in currently moderate-climate wine-growing areas.

Highlights

IntroductionGrapevines are susceptible and responsive to their surrounding environment
Preliminary characterization of trans-resveratrol levels in Israeli wines was performed on 130 wines from three cultivars: 34 of Merlot, 69 of Cabernet Sauvignon, and 21 of Shiraz (Figure 2A)
To better understand the ecogeographic effects on wine quality, we studied the phenolic concentration changes in relation to the variety, the location of the vineyard, and the environmental conditions such as soil type, humidity, and temperature

Summary

Introduction

Grapevines are susceptible and responsive to their surrounding environment Factors such as climate region and terroir are known to affect polyphenolic compounds in wine and its quality. We present a preliminary survey (2012–2014) in different climate zones and terroirs, which showed that trans-resveratrol concentrations in Merlot and Shiraz were high, while those of Cabernet Sauvignon were significantly lower. Concentrations between five areas of different climate and terroir. Meteorological Organization (WMO), which places the average temperature of the Earth at 1.1 ◦ C above pre-industrial levels [2]. While these international assessments provide important insights into global processes and threats to global systems, the Levant region (Eastern Mediterranean region) is already hot, arid, and water scarce.

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