Rootstock Effects on Deficit-Irrigated Winegrapes in a Dry Climate: Grape and Wine Composition

Harbertson, James F.; Keller, Markus

doi:10.5344/ajev.2011.11079

Cited by 56 publications

(49 citation statements)

References 19 publications

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“…A companion study evaluated rootstock effects on fruit and wine composition. The findings of that study are reported in a separate publication (Harbertson and Keller 2012).…”

mentioning

confidence: 81%

“…Juice potassium concentration ([K + ]) was measured in 2007 and 2009 harvest samples as described by Harbertson and Harwood (2009). Additional fruit composition data and winemaking procedures and results are reported in a companion paper (Harbertson and Keller 2012).…”

Section: Methodsmentioning

confidence: 99%

“…At harvest, which occurred on the same day for all rootstocks within a scion cultivar, 100 berries were collected per replicate. Berry samples were weighed and analyzed the following day for total soluble solids (TSS), titratable acidity (TA), pH, and anthocyanin color (Harbertson and Keller 2012). Juice potassium concentration ([K + ]) was measured in 2007 and 2009 harvest samples as described by Harbertson and Harwood (2009).…”

Section: Methodsmentioning

confidence: 99%

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Rootstock Effects on Deficit-Irrigated Winegrapes in a Dry Climate: Vigor, Yield Formation, and Fruit Ripening

Keller¹,

Mills²,

Harbertson³

2011

Am. J. Enol. Vitic.

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A rootstock field trial was conducted in the Yakima Valley, southeastern Washington, with three Vitis vinifera cultivars (Merlot, Syrah, Chardonnay). Vines were grown on their own roots or field-grafted to the rootstocks 5C, 99R, 140Ru, 1103P, 3309C, and an unnamed rootstock from Cornell University (here termed 101CU) that is a likely sibling or seedling of 101-14 Mgt. Repeated scion dieback due to cold injury to 99R led us to abandon this rootstock. Vine phenology, vigor, water status, yield formation, and fruit ripening and composition were evaluated during three years beginning in the vineyard's ninth year. Own-rooted Merlot and Chardonnay grew more shoots than grafted vines, and 140Ru and 1103P tended to reduce pruning weights. However, 3309C was the rootstock associated with the highest pruning weights in Syrah and the lowest in Chardonnay. Rootstocks usually did not impact vine phenology, fruit set, and plant water status, although there was a trend for stem water potential to be highest with 3309C and lowest with 5C. The rootstock effect on yield formation depended on the scion cultivar, and variations in different yield components often cancelled out each other, but 3309C (Merlot and Syrah), 5C (Merlot and Chardonnay), and own roots (Chardonnay) were often associated with high yields. Nevertheless, the rootstocks had only minor effects on fruit ripening and did not consistently alter soluble solids, TA, K + , or anthocyanin pigments, but the pH was higher in fruit from own-rooted vines compared with grafted Merlot and Chardonnay. Overall, scion effects and differences due to yearly climate variation far outweighed any differences due to rootstock.

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“…A companion study evaluated rootstock effects on fruit and wine composition. The findings of that study are reported in a separate publication (Harbertson and Keller 2012).…”

mentioning

confidence: 81%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Rootstock Effects on Deficit-Irrigated Winegrapes in a Dry Climate: Vigor, Yield Formation, and Fruit Ripening

Keller¹,

Mills²,

Harbertson³

2011

Am. J. Enol. Vitic.

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“…The selection of more drought tolerant rootstocks must also be regarded as a possible adaptation measure (Harbertson and Keller, 2012;Keller et al, 2011). Changes in tillage systems and soil management should also be considered (Bahar and Yasasin, 2010;Kvaternjak et al, 2008).…”

Section: Short-term Adaptation Measuresmentioning

confidence: 99%

Viticulture in Portugal: A review of recent trends and climate change projections

et al. 2017

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Aim:The winemaking sector in Portugal is of major socio-economic relevance, significantly contributing to the national exports and sustaining many wine-related activities, including oenotourism. Portuguese viticultural regions present a wide range of edaphoclimatic conditions with remarkable regional specificities, thus contributing to the individuality of their wines. Owing to the strong influence of climate and weather factors on grapevines, climate change may drive significant impacts on Portuguese viticulture. Methods and results:Climatic projections for the next decades in Portugal highlight an overall warming and drying trend of the grapevine growing season, potentially resulting in modifications in phenology, growth, development, yields and eventually wine characteristics and typicity. Furthermore, the current viticultural suitability of each region is projected to undergo significant changes, suggesting a reshaping of the optimal conditions for viticulture throughout the country. In order to sustain high quality levels and affordable yield regularity, cost-effective, appropriate and timely adaptation measures must be implemented by the sector. Conclusion:The most recent scientific studies covering the potential impacts of climate change on Portuguese viticulture are herein presented.Significance and impact of the study: Possible adaptation measures against these threats are also discussed, foreseeing their integration into decision support systems by stakeholders and decision-makers.

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“…The delimited thermal classes may allow growers to select and grow grapevine varieties based on their optimum thermal requirements (Lopes et al, 2008;Alves et al, 2013). The hydric classes may also assist the selection of suitable rootstocks to improve plant water status (Pavlousek, 2011;Harbertson and Keller, 2012). These issues are particularly relevant taking into account the projected climate change impacts for the region, mainly the drying trend over the next decades (Fraga et al, 2016b;Santos et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

Multivariate clustering of viticultural terroirs in the Douro winemaking region

Fraga

Costa

Santos

2017

Ciência Téc. Vitiv.

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SUMMARYThe Douro Demarcated Region (DDR) is one of the most important winemaking regions in Portugal. Viticulture is historically and culturally tied to the DDR, having a strong impact on the local economy. This mountainous region, characterized by the steep slopes of the Douro Valley, provides a wide range of environmental characteristics for grapevine growth. Different climatic conditions, soil profiles, topography, grapevine varieties and management practices comprise the DDR terroir, resulting in the distinctiveness of the wines produced. In the present study, an assessment of the homogeneous zones of interest for viticultural activities is proposed for the DDR, by integrating different terroir elements (thermal, hydric, soils, topography and vegetation), using state-of-the-art high resolution datasets (1 km) and a large number of variables/indices. A multivariate zoning was carried out using a principal component analysis and a subsequent clustering methodology. A geospatial assessment of the terroir elements was also performed separately for each type of vegetation covering the DDR. The inter-connections of the different terroir elements that exist at a given location, were also innovatively assessed. The zoning may promote a more appropriate selection of vineyard sites, the selection of more locally-adapted varieties and rootstocks and the adoption of appropriate viticultural practices and management planning. After assessing the terroir conditions that exist at the current vineyard locations, possible expansion zones within the DDR were also evaluated. The present study may also be used as an archetypal methodology that can be applied to other winemaking regions worldwide. RESUMOA Região Demarcada do Douro (RDD) é uma das regiões vitivinícolas mais importantes de Portugal. A viticultura está historicamente e culturalmente ligada à RDD, tendo uma importância vital para a economia local. Esta região montanhosa, caracterizada pelas encostas íngremes do vale do Douro, proporciona uma ampla gama de características edafoclimáticas para o crescimento da vinha. Diferentes condições climáticas, perfis de solo, topografia, castas e práticas culturais fazem parte do terroir da RDD, resultando no carácter distintivo dos vinhos aí produzidos. No presente estudo, propõe-se uma avaliação de zonas homogéneas com interesse para as atividades vitivinícolas na RDD, integrando diferentes elementos do terroir (térmico, hídrico, solos, topografia e vegetação), utilizando-se conjuntos de dados de alta resolução (1 km) e um elevado número de variáveis/índices. Foi realizada uma zonagem multivariada com recurso à análise em componentes principais e a uma metodologia de clustering. A avaliação geoespacial dos elementos do terroir foi também realizada separadamente para cada tipo de vegetação existente na RDD. As interconexões entre os diferentes elementos do terroir de um determinado local também foram avaliadas de forma inovadora. Esta zonagem poderá potenciar uma seleção mais adequada de áreas vitícolas, a seleção de castas e p...

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Rootstock Effects on Deficit-Irrigated Winegrapes in a Dry Climate: Grape and Wine Composition

Cited by 56 publications

References 19 publications

Rootstock Effects on Deficit-Irrigated Winegrapes in a Dry Climate: Vigor, Yield Formation, and Fruit Ripening

Rootstock Effects on Deficit-Irrigated Winegrapes in a Dry Climate: Vigor, Yield Formation, and Fruit Ripening

Viticulture in Portugal: A review of recent trends and climate change projections

Multivariate clustering of viticultural terroirs in the Douro winemaking region

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