Sensory analysis of Ontario Riesling wines from various water status zones

Willwerth, James; Reynolds, Andrew G.; Lesschaeve, Isabelle

doi:10.20870/oeno-one.2018.52.2.1669

Cited by 9 publications

(7 citation statements)

References 38 publications

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“…Many studies have attributed the vine water status as a component of terroir because it impacts the physiology of the vine and the biosynthesis of secondary metabolites, including aroma compounds and their precursors [44,46,47]. Climate change, particularly the projected temperature increases and changes in precipitation [48], will lead to a change in the water status of the vines during the course of the growing season [49].…”

Section: Impact Of Climate Changementioning

confidence: 99%

“…Climate change, particularly the projected temperature increases and changes in precipitation [48], will lead to a change in the water status of the vines during the course of the growing season [49]. Vineyard soils can impact grape aroma compounds, but it is largely due to the physical characteristics of the soil such as the water holding capacity and drainage that influence the vine water status and vine vigor [46,47,50]. Therefore, climate change-associated effects on the water content in soil, water availability, and vine water status impact the vine growth, physiology of the vine, and synthesis/degradation of MPs.…”

Section: Impact Of Climate Changementioning

confidence: 99%

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Prevalence and Management of Alkyl-Methoxypyrazines in a Changing Climate: Viticultural and Oenological Considerations

et al. 2021

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Alkyl-methoxypyrazines are an important class of odor-active molecules that contribute green, ‘unripe’ characters to wine and are considered undesirable in most wine styles. They are naturally occurring grape metabolites in many cultivars, but can also be derived from some Coccinellidae species when these ‘ladybugs’ are inadvertently introduced into the must during harvesting operations. The projected impacts of climate change are discussed, and we conclude that these include an altered alkyl-methoxypyrazine composition in grapes and wines in many wine regions. Thus, a careful consideration of how to manage them in both the vineyard and winery is important and timely. This review brings together the relevant literatures on viticultural and oenological interventions aimed at mitigating alkyl-methoxypyrazine loads, and makes recommendations on their management with an aim to maintaining wine quality under a changing and challenging climate.

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Section: Impact Of Climate Changementioning

confidence: 99%

Section: Impact Of Climate Changementioning

confidence: 99%

Prevalence and Management of Alkyl-Methoxypyrazines in a Changing Climate: Viticultural and Oenological Considerations

et al. 2021

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“…In Bordeaux (France), the best soils are considered those characterized by free draining, lack of water logging in the rooting zone, and limited water availability during ripening [ 6 ]. Indeed, some researchers give more importance to soil physical properties determining water supply to the vine rather than to soil chemical constituents [ 7 ]. Whether soil plays a primary and direct role on wine quality or it indirectly determines wine quality, through its effects on vine growth, canopy density, and vigor must be still established [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Soil and Regulated Deficit Irrigation Affect Growth, Yield and Quality of ‘Nero d’Avola’ Grapes in a Semi-Arid Environment

Barbagallo

Vesco

Lorenzo

et al. 2021

Plants

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The present work studied the effect of two consecutive years of regulated deficit irrigation (RDI) compared to rain fed management on the vegetative growth, yield, and quality of ‘Nero d’Avola’ grapes. The trial was conducted separately in two soils (vertisol and entisol) located at the top and bottom hillside of the same vineyard. Vertisol was characterized by greater depth, organic matter, exchangeable K2O, and total N than entisol. RDI was based on an irrigation volume at 25% of estimated crop evapotranspiration (ETc) up to end of veraison and 10% of estimated ETc up to 15 days before harvest. Predawn water potential (PDWP) was used as indicator of plant water status and irrigation timing. No difference in irrigation management was evident between vertisol and entisol. Under Mediterranean climate conditions, RDI was able to enhance grape yield and vegetative growth, especially in vertisol, but it reduced berry titratable acidity and total anthocyanins. ‘Nero d’Avola’ showed to adapt to drought conditions in the open field. Both soil type and irrigation regimes may provide opportunities to obtain different ‘Nero d’Avola’ wine quality and boost typicality.

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“…The specific objectives of this research were to demonstrate the putative influences of soil texture, soil water content, and vine water status on vine and fruit development within vineyard blocks, to delineate these terroir effects using geomatic technologies, and to elucidate relationships between soil and vine water status vs. vine performance. Data on berry composition are included in a companion article (Willwerth and Reynolds, 2020) and data describing sensory differences between wines from high and low water status zones in these vineyards were published in Willwerth et al (2018).…”

Section: Introductionmentioning

confidence: 99%

Spatial variability in Ontario Riesling vineyards: I. Soil, vine water status and vine performance

Reynolds

Willwerth

2020

OENO One

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Aim: The major focus of this research was to explain the so-called terroir effects that impact grapevine yield components, berry composition, and wine varietal character. To elucidate potential contributors to the terroir effect, vine water status [midday leaf water potential (ψ)] was chosen as a major determinant. The hypothesis of this component of the study was that consistent leaf ψ zones could be identified within vineyard sites and that vine water status would play a major role in vine performance and yield components. Soil texture was anticipated to play a role indirectly through its water-holding capacity.Methods and materials: To test this hypothesis, ten Riesling vineyards representative of each Vintners Quality Alliance of Ontario sub-appellation were selected within the Niagara Peninsula. These vineyards were delineated using global positioning systems and 75–80 sentinel vines were geo-referenced within a sampling grid for data collection. During the 2005–2007 growing seasons, leaf ψ measurements were collected bi-weekly from a subset of these sentinel vines. Data were collected on soil texture and composition, soil water content (SWC), vine performance and yield components. These variables were mapped using geographical information systems software and relationships between them were elucidated.Results: Vineyards were variable in terms of soil texture, composition, nutrition, and moisture. However, in general, few consistent relationships with soil composition variables were found. As hypothesized, consistent leaf ψ zones were identified within vineyards in all three vintages. Some geospatial patterns and relationships were spatially and temporally stable within vineyards. In many cases, spatial distribution of leaf ψ was temporally stable within vineyards despite different weather conditions during each growing season. Spatial trends within vineyards for SWC and leaf ψ were temporally stable over the 3-year period for eight vineyards. Generally, spatial relationships between leaf ψ, SWC, vine size, berry weight and yield were also temporally stable. Some inconsistencies in spatial distribution of variables were attributable to winter injury.Conclusions: Many viticultural variables such as leaf ψ, vine size, berry weight, and yield were spatially variable and, as hypothesized, consistent leaf ψ zones were identified within vineyards in three distinct vintages. Many geospatial patterns and relationships were determined and were temporally stable, and this temporal stability in these variables occurred despite different growing seasons. The strongest relationships were those concerning leaf ψ, SWC, vine size, and berry weight. No consistent relationships were found concerning soil composition. The most consistent soil variables that impacted vine performance and yield components were physical properties, particularly texture.Significance and impact of the study: Soil had some indirect effects, but leaf ψ was more likely a major contributor to the terroir effect, as it had a major impact on vine size, berry weight and yield in many vineyards across multiple vintages. Temporal stability is required for many practical geomatic applications to be initiated in vineyards, but it is also of importance to future research endeavors for this project as well as others.

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Sensory analysis of Ontario Riesling wines from various water status zones

Cited by 9 publications

References 38 publications

Prevalence and Management of Alkyl-Methoxypyrazines in a Changing Climate: Viticultural and Oenological Considerations

Prevalence and Management of Alkyl-Methoxypyrazines in a Changing Climate: Viticultural and Oenological Considerations

Soil and Regulated Deficit Irrigation Affect Growth, Yield and Quality of ‘Nero d’Avola’ Grapes in a Semi-Arid Environment

Spatial variability in Ontario Riesling vineyards: I. Soil, vine water status and vine performance

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