Row orientation effects on chemical composition and aromatic profile of Syrah winter wines

Renata Vieira Da Mota,Ricardo Henrique Paulino Raimundo,Camila Pinheiro Carvalho Silva,Claudia Rita De Souza,Fernanda De Paula Fernandes,Isabela Peregrino

doi:10.1590/fst.38219

Renata Vieira Da Mota, Ricardo Henrique Paulino Raimundo + Show 4 more

Open Access

https://doi.org/10.1590/fst.38219

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Abstract

Abstract Sunlight and heating influence leaf and grape metabolism and therefore wine quality. As a recent management tool, no information exists on the effects of grapevine row orientation on the wine composition of Syrah vines within the context of double pruning management, a technique used to transfer the grape harvest from the wet summer to the dry winter season. This is a first attempt to investigate the wine composition from north-south- (NS) and east-west- (EW) oriented Syrah winter vines. EW wine samples had higher total acidity, residual sugars, alcohol and color hue, whereas NS wines exhibited higher content of color intensity, anthocyanins, total phenolics, total phenolic index, ashes and pH. The identification of volatile compounds was tentatively performed and demonstrated the presence of alkanes, volatile phenols and alkyl sulfide in NS wines, while butyrolactone and beta-damascenone were found mainly in EW wines. Row orientation contributed to wine composition and could be used as a management tool for obtaining individual wine styles.

Highlights

IntroductionThe first vineyard managed with the double pruning technique was introduced in the coffee region of Três Corações in 2001 (Amorim et al, 2005)
The concept of winter wines is relatively new in Brazil
When the density reached approximately 990 g L-1, the wines were transferred to 5 L glass carboys for malolactic fermentation that was carried out at 21 °C, without lactic bacteria inoculation, until malic acid was not detected by the paper chromatography method (Amerine & Ough, 1980)

Summary

Introduction

The first vineyard managed with the double pruning technique was introduced in the coffee region of Três Corações in 2001 (Amorim et al, 2005). Under this management, the grapevines are first spur pruned at the end of winter (August or September) to develop the vegetative cycle with the removal of all clusters. The reduced light interception in an EW row orientation may have a negative impact on growth and yield compared to an NS direction (Chorti et al., 2018; Souza et al, 2019). To gain further knowledge on the double pruning management technique, this preliminary study aims to investigate the effects of row orientation on Syrah winter wine composition

Materials and methods

Wine composition

Volatile extraction and analysis

Statistical analysis

Results and discussion

Conclusion