Macrowine 2021
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

Related articles…

Physiological and growth reaction of Shiraz/101-14 Mgt to row orientation and soil water status

Advanced knowledge on grapevine row orientation is required to improve establishment, management and outcomes of vineyards on terroirs with different environmental conditions (climate, soil, topography) and in view of a future change to more extreme climatic conditions. The purpose of this study was to determine the combined effect of row orientation, plant water status and ripeness level on the physiological and viticultural reaction of Shiraz/101-14 Mgt.

Effects of mechanical leafing and deficit irrigation on Cabernet Sauvignon grown in warm climate of California

San Joaquin Valley accounts for 40% of wine grape acreage and produces 70% of wine grape in California. Fruit quality is one of most important factors which impact the economical sustainability of farming wine grapes in this region. Due to the recent drought and expected labor cost increase, the wine industry is thrilled to understand how to improve fruit quality while maintaining the yield with less water and labor input. The present study aims to study the interactive effects of mechanical leafing and deficit irrigation on yield and berry compositions of Cabernet Sauvignon grown in warm climate of California.

The effects of cane girdling on berry texture properties and the concentration of some aroma compounds in three table grape cultivars

The marketability of the table grapes is highly influenced by the consumer demand; therefore the market value of the table grapes is mainly characterized by its berry size, colour, taste and texture. Girdling could cause accumulation of several components in plants above the ringing of the phloem including clusters and resulting improved maturity. The aim of the experiments was to examine the effect of girdling on berry texture characteristics and aroma concentration.

Application of a fluorescence-based method to evaluate the ripening process and quality of Pinot Blanc grape

The chemical composition of grape berries at harvest is one of the most important factors that should be considered to produce high quality wines. Among the different chemical classes which characterize the grape juice, the polyphenolic compound, such as flavonoids, contribute to the final taste and color of wines. Recently, an innovative non-destructive method, based on chlorophyll fluorescence, was developed to estimate the phenolic maturity of red grape varieties through the evaluation of anthocyanins accumulated in the berry skin. To date, only few data are available about the application of this method on white grape varieties.

Different yield regulation strategies in semi-minimal-pruned hedge (SMPH) and impact on bunch architecture

Yields in the novel viticulture training system Semi-Minimal-Pruned Hedge (SMPH) are generally higher compared to the traditional Vertical Shoot Positioning (VSP). Excessive yields have a negative impact on the vine and wine quality, which can result in substantial losses in yield in subsequent vintages (alternate bearing) or penalties in fruit quality. Therefore yield regulation is essential. The bunch architecture in SMPH differs from VSP. Generally there is a higher amount but smaller bunches with lower single berry weights in SMPH compared to VSP.