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Volatile Characterization of Recovery Minority Grape Varieties from Castilla-La Mancha Region (Spain)
Cristina Cebrián-Tarancón1, Argimiro Sergio Serrano1,2, Juan L Chacón-Vozmediano2
1Department of Agricultural Chemistry, School of Agricultural and Forestry Engineering and Biotechnology, University of Castilla-La Mancha, Avda. de España s/n, 02071 Albacete, Spain.
This study assessed aromatic potential in Spanish minority grape cultivars under water stress. Irrigated white varieties showed higher aromatic potential, suggesting suitability for semi-arid wine regions.
Area of Science:
- Viticulture and Oenology
- Plant Physiology
- Analytical Chemistry
Background:
- Climate change necessitates resilient grapevine cultivars for sustainable wine production.
- Minority grape varieties offer potential for adaptation and unique quality traits.
- Water deficit significantly impacts grapevine physiology and berry composition.
Purpose of the Study:
- To characterize the aromatic potential of nine white and six red minority Spanish grape cultivars.
- To evaluate the effect of two water-deficit regimes (rainfed and irrigated) on their aromatic profiles.
- To identify cultivars suitable for cultivation in semi-arid regions.
Main Methods:
- Analysis of varietal aromatic potential index (IPAv) and detailed aromatic composition.
- Utilized Headspace-Solid Phase Microextraction-Gas Chromatography-Mass Spectrometry (HS-SBSE-GC/MS).
- Examined aromatic extracts at two different pH levels.
Main Results:
- White minority varieties exhibited higher IPAv under irrigation.
- Aromatic composition differed significantly between minority and reference cultivars, mainly due to esters and acids.
- Acidic conditions enhanced the extractability of specific aroma compounds like linalool.
Conclusions:
- Recovered minority grape cultivars show promise for wine production in water-limited semi-arid regions.
- Aromatic potential is influenced by irrigation and pH, offering selection criteria for adaptation.
- These findings contribute to the sustainability of the wine sector through cultivar diversification.
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