 IVES 9 IVES Conference Series 9 Under-vine cover crop: effect over glycosidic aroma precursors of Vitis vinifera L. Cv Syrah

Under-vine cover crop: effect over glycosidic aroma precursors of Vitis vinifera L. Cv Syrah

Abstract

AIM: Volatile compounds joint to aromatic precursors form the aroma of grape must that will provide a characteristic aroma to the wine. A high proportion of aromatic compounds are present in the berry in their precursor form linked to sugars. The amount of the glycosidic fraction may be influenced by many factors such as soil, climatic conditions, viticultural practises, etc. [1]. The use of cover crops is a practice that is expanding in vine culture and to study indeep the effect of this practice on the aroma of grape is required. To this end, the effects of the employment of “Zulla” as cover crop on glycosidic aromatic precursors of Shyraz grapes has been studied.

METHODS: Grape samples from vines with three different amount of cover crop (one line, two lines and four lines) and without cover crop were recolected during two harvests (2019 and 2020). Glycosidic aroma precursors fraction was extracted and hydrolized following the method proposed by Loscos et al., [2] and the aglycons were analyzsed by SPME-GC-MS following the method appliyed by Talaverano et al. [3] with modifications.

RESULTS: A total of 40 aromatic precursors were determined in the Syrah must samples analyzed. Among them, 12 terpenes, 11 norisoprenoids, 7 alcohols, 5 aldehydes and 3 acids. Significant differences were found among the precursors volatile compounds found in the different under-vine cover crop strategies tested. The employment of “Zulla” showed a positive effect in the amount of aroma precursors in the must.

CONCLUSION

The employement of “Zulla” as under-vine cover crop influences the composition in aromatic precursor present in the grape and potentially the volatile profile of the resulting wines.

DOI:

Publication date: September 7, 2021

Issue: Macrowine 2021

Type: Article

Authors

M.P. Segura-Borrego

Nutrition and Food Science Area, Faculty of Pharmacy, University of Seville, Seville, Spain.,S. Tejero, Nutrition and Food Science Area, Faculty of Pharmacy, University of Seville, Seville, Spain. B. Puerta, Agricultural and Fisheries Research and Training Institute (IFAPA), Rancho de la Merced. Jerez de la Fra. Spain. E. Valero, Department of Molecular Biology and Biochemical Engineering, University of Pablo de Olavide, Seville, Spain. M.L.Morales, Nutrition and Food Science Area, Faculty of Pharmacy, University of Seville, Seville, Spain. C. Ubeda, Nutrition and Food Science Area, Faculty of Pharmacy, University of Seville, Seville, Spain.

Contact the author

Keywords

zulla cover crop, aroma precursor, ecological crop, warm climate zone

Citation

Changes in the composition and extractability of flavonoids in Cabernet-Sauvignon: influence of site, climate and vine water status

The purpose of the study was to monitor berry development as a function of site, vine water status and climate in order to improve our understanding of the role played by climate change on secondary metabolites relevant to wine quality.

Re-examination and meta-analysis of previous research as a tool to evaluate the suitability of rootstocks in adaptation to global change. A study case from Spanish viticulture

Meta-analysis (MA) is a method that allows statistical synthesis of the results of several similar individual studies (Figure 1). This term was introduced by Glass in 1976 as a useful tool for the scientific community to pool and summarise the enormous amount of information collected in the literature.

New methods and technologies to describe the environment in terroir studies

The concept of terroir in viticulture deals with the influence of environmental factors on vine behaviour and grape ripening. Recent advances in technology, in particular computer technology, allow a more in-depth study of the environment. Geomorphology can be studied with digital Elevation Models (DEM). Soils can be surveyed with geophysics.

Fruit set rate clonal variation explains yield differences at harvest in Malbec

Malbec is Argentina’s flagship variety, and it is internationally recognized for producing high-quality red wines. Fruit set rate is a major component in grapevine yield determination, and it is the outcome of multiple genetic and environmental interacting variables. Here, we characterized the reproductive performance of 25 Malbec clones grown under homogeneous conditions in a 23-years old experimental plot. We measured traits near flowering (like the number of flowers per inflorescence) and at harvest (including the number of berries per cluster and berry weight), during two consecutive seasons (2022 and 2023).

Applications of a novel molecular phenology scale to align the stages of grape berry development

Phenology scales widely adopted by viticulturists (i.e., BBCH or modified E-L systems) are classification tools that describe seasonal and precisely recognized stages of fruit growth and development based on specific descriptors such as visual/physical traits or easy-to-measure compositional parameters.