Investigation of intraregional variation, grape amino acids, and pre-fermentation freezing on varietal thiols and their precursors for Vitis vinifera Sauvignon blanc

Aims: The aim of this work is to test the effects of soil-applied nitrogen (N) at budbreak and subsequent foliar-applied N at veraison on the N composition and partitioning in berries of water stressed Vitis vinifera L. cv. Sauvignon blanc vines.Methods and results: N fertilizer was applied to the soil at budbreak at doses of 30 or 60 kg N/ha, while the control did not receive any treatment. This did not increase N content of leaves and the vines showed symptoms of N deficiency from the beginning of the season. In order to overcome this deficiency, N foliar sprayings were applied at veraison at doses of 2.5 or 5 kg N/ha to vines having received 30 or 60 kg N/ha of soil-applied N, respectively. Total N of berry flesh responded to N foliar fertilization more than that any other berry part, whereas amino acids in skins were the more affected by N foliar fertilization than those of other berry parts. Only the 60 soil/5 foliar N treatment produced a measurable increase in the total, assimilable and amino N in berry juices at maturity. Assimilable N was a better indicator for N summer uptake by the vine than total N. Of all amino acids, arginine showed the highest increases following N fertilization and could be considered among the better indicators to distinguish between N summer fertilization treatments.Conclusion: In conditions of severe water deficit and N deficiency, fertilization at a dose of 60 kg/ha soil-applied N combined with 5 kg/ha foliar-applied N improved fruit fermentability. Results support the use of foliar fertilization at veraison as a tool for enhancing grape quality and to a certain extent the style of wine.Significance and impact of study: This work helps to provide insight into the effect of N soil fertilization along with foliar fertilization on waterstressed vines. This may be useful in fertilization programs in the Mediterranean area and may help to choose the type and the rate of the N fertilization in case of severe vine water deficit. Also, we provide information of utmost importance on the distribution of summer foliarapplied N in grape tissues.

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Effects of irrigation on ecophysiology, sugar content and tiolic precursors on Vitis vinifera cv. Sauvignon Blanc facing the climate change

Plant Physiology and Biochemistry ◽

10.1016/j.plaphy.2021.04.029 ◽

2021 ◽

Author(s):

Eleonora Cataldo ◽

Linda Salvi ◽

Giovan Battista Mattii

Keyword(s):

Climate Change ◽

Vitis Vinifera ◽

Sugar Content ◽

Sauvignon Blanc

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Efecto de la poda sobre la calidad de frutos DE Vitis vinifera L. Sauvignon Blanc durante la maduración

Temas Agrarios ◽

10.21897/rta.v17i2.701 ◽

2012 ◽

Vol 17 (2) ◽

pp. 43-51

Author(s):

Ingrid Walteros ◽

Deisy Molano ◽

Pedro Almanza-Merchán

Keyword(s):

Vitis Vinifera ◽

Vitis Vinifera L ◽

Sauvignon Blanc ◽

Para Determinar

La producción y calidad de la uva para elaboración de vino, se modifican con las prácticas culturales que se realizan en el viñedo. La poda es una de las prácticas que buscan mejorar la calidad final de mostos y vinos. Con la investigación se buscó conocer el efecto de tres tipos de poda (corta, larga y mixta) en la evolución de los componentes de la calidad, durante la maduración de frutos de Vitis vinifera L. var. Sauvignon Blanc, en el municipio de Sutamarchán-Boyacá, Colombia. Se recolectaron, cada quince días, aleatoriamente 20 bayas, desde el inicio del envero, hasta la maduración, para determinar el comportamiento de los sólidos solubles totales (SST), acidez total titulable (ATT) e índice de madurez técnica (IMT). Con la poda larga se alcanzó el mayor contenido de azúcares (22,76ºBrix) y el más alto IMT (3,42), la acidez total titulable (ATT) disminuyó con el desarrollo del fruto, obteniéndose en el momento de la vendimia una acumulación de ácidos orgánicos de 6,88 g L-1. Los tratamientos no afectaron el contenido de SST; mas si hubo diferencias significativas entre ATT e IMT. La poda larga produjo los frutos con los valores más adecuados, de calidad (SST, ATT, IMT) requeridos para la elaboración de vinos tropicales de la variedad Sauvignon Blanc, en la localidad del estudio.

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Effects of Soil Parent Material and Climate on the Performance of Vitis vinifera L. cvs. Sauvignon blanc and Cabernet Sauvignon - Part II. Climate, Leaf Analysis, Juice Analysis and Wine Quality

South African Journal of Enology and Viticulture ◽

10.21548/33-2-1117 ◽

2016 ◽

Vol 33 (2) ◽

Author(s):

L.P. Shange ◽

W.J. Conradie

Keyword(s):

Vitis Vinifera ◽

Parent Material ◽

Vitis Vinifera L ◽

Cabernet Sauvignon ◽

Wine Quality ◽

Sauvignon Blanc ◽

Leaf Analysis ◽

Soil Parent Material

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Leaf-to-Fruit Ratios in Vitis vinifera L. cv. “Sauvignon Blanc”, “Carmenère”, “Cabernet Sauvignon”, and “Syrah” Growing in Maule Valley (Chile): Influence on Yield and Fruit Composition

Agriculture ◽

10.3390/agriculture9080176 ◽

2019 ◽

Vol 9 (8) ◽

pp. 176

Author(s):

Gastón Gutiérrez-Gamboa ◽

Irina Díaz-Galvéz ◽

Nicolás Verdugo-Vásquez ◽

Yerko Moreno-Simunovic

Keyword(s):

Vitis Vinifera ◽

Yield Components ◽

Soluble Solids ◽

Vitis Vinifera L ◽

Cabernet Sauvignon ◽

Clear Trend ◽

Total Polyphenol ◽

Sauvignon Blanc ◽

Fruit Composition ◽

Berry Composition

A trial was conducted during the 2005–2006 season in order to determine the effects of different leaf-to-fruit ratios on yield components and fruit composition in four Vitis vinifera L. cultivars. The treatments consisted of selecting shoots of four lengths (>1.3 m, 1.3–0.8 m, 0.8–0.4 m, and <0.4 m) with two crop levels (1–2 clusters/shoot), which allowed defining eight ratios. Berry composition and yield components were measured. The treatments affected the accumulation of soluble solids in “Sauvignon blanc”, “Cabernet Sauvignon”, and “Syrah”, delaying it as the ratio decreased. All yield components were affected in “Sauvignon blanc”, while bunch weight and the number of berries per bunch were altered without a clear trend. None of the yield components were affected in “Cabernet Sauvignon”, while the lowest ratio presented the lowest number of berries per bunch in “Syrah”. Total polyphenol index (TPI) was affected in “Carmenère” without a clear trend. A highly significant correlation was found between shoot length and leaf area in all studied cultivars. As the ratio increased, the shoot lignification increased in “Sauvignon blanc”. However, studies must be conducted during more seasons to establish better conclusions about the effects of leaf-to-fruit ratios on yield and fruit composition.

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