Shiraz vines maintain yield in response to a 2–4°C increase in maximum temperature using an open-top heating system at key phenostages

Sadras, Víctor O.; Soar, Christopher J.

doi:10.1016/j.eja.2009.09.004

Cited by 58 publications

(46 citation statements)

References 39 publications

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“…Seventeen interviewees (n = 27) reported problems encountered specifically with Syrah, all linked to one or more of the three following reasons. Firstly, Syrah does not resist daily T max above or equal to 35°C as well as Grenache and Carignan when it is not irrigated and responds by reducing yield and producing damaged fruit (Sadras and Soar 2009;Sadras et al 2010). As shown in Fig.…”

Section: The Syrah Issuementioning

confidence: 97%

The viticultural system and climate change: coping with long-term trends in temperature and rainfall in Roussillon, France

et al. 2013

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International audienceClimate change could put at risk viticultural areas situated at the hotter margins of Vitis vinifera growth climatic range. We focus on two such regions with a Mediterranean climate (CSb type in Köppen classification): Côtes-du-Roussillon in southern France and McLaren Vale in South Australia. They share a relatively similar recent climate evolution. Based on data from two synoptic weather stations, Perpignan (France) and Adelaide (Australia), with daily time series running from 1956 to 2010, we identified changes in temperatures and precipitation patterns, especially an increase of maximum temperatures, of the Huglin Index and Cool Night Index. According to climate models (data from DRIAS project in France, CSIRO Mk3.5 model in Australia) this tendency is likely to continue in the future. In these two regions, two red varieties are mainly grown: Grenache and Shiraz, as they are relatively well suited to Mediterranean climate and to market demand in volatile global markets. Based on twenty in-depth semi-structured interviews in both regions, we identified that vineyard management practices -current and planned for a near future, are based in their vast majority on economical considerations. Concerns of producers include: maintaining income and market position by producing optimal yields, a constant wine style and quality and a diversified offer. In addition, producers feel they have to deal with an increasing uncertainty regarding climate variability, confirmed by climate data. Adaptation strategies of producers to various types of changes, including climate change, take into account a multiplicity of factors, in which climate change is often not the main concern. Two opposite systems of legislation and cultural traditions in the two regions also make the choice and implementation of adaptation strategies very different. Thus the sensitivity of viticultural systems to climate change depends strongly on non-climatic factors

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Section: The Syrah Issuementioning

confidence: 97%

The viticultural system and climate change: coping with long-term trends in temperature and rainfall in Roussillon, France

et al. 2013

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“…Merlot Temperature/ radiation (east vs west, exposed vs shaded and heated vs cooled bunches) Ambient/shaded + up to 13°C in sun-exposed berries Active, with blowers From bunch closure to harvest Anthocyanins Higher in east-exposed bunches Increased by sun-exposure Increased in cooled sun-exposed bunches and reduced in heated shaded bunches TSS Unaffected by exposure Acidity Reduced in west-exposed bunches Sadras and Soar (2009) reduce radiation intensity and change spectral composition; a polyethylene cover, for example, filters out UV-B radiation and increases the proportion of diffuse radiation, which may alter both the synthesis of phenolic substances (Spayd et al 2002, Berli et al 2011) and carbon assimilation (Berli et al 2013) in comparison with that of control plants growing in natural conditions. Air speed is reduced in the chamber altering boundary layer and plant energy balance; the poor heat dissipation under calmer conditions may cause a substantial warming of plant tissues (De Boeck et al 2012a).…”

Section: Referencementioning

confidence: 99%

Review: critical appraisal of methods to investigate the effect of temperature on grapevine berry composition

Bonada

Sadras

2014

Australian Journal of Grape and Wine Research

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The grapevine is an economically important crop and a model species of long‐lived perennials widely used in bioclimatic studies. Ambient temperature modulates berry composition, hence the significant research effort in establishing links between temperature, berry composition and wine attributes. Our current understanding of the effect of temperature on berries and wines has been largely gained from indirect methods or direct methods in controlled conditions. Indirect methods include comparisons of thermally contrasting locations and vintages; this approach is of value but is bound to be inconclusive as the effect of temperature is often confounded with other weather and climate factors (solar radiation, vapour pressure deficit and rainfall), management practices and soils. Direct experimental methods comparing fruit grown at a range of temperature are required to prove cause‐and‐effect, but attempts to modify the thermal regime of the plant often generate secondary effects. Experimental artefacts in controlled environments often include small soil volume, lack of wind and altered radiation regimes, with direct implications for plant physiology and berry composition. Experiments involving controlled temperature in vineyards aim at a higher degree of realism, but are constrained by cost, issues of scale in space and time, and are not necessarily free from artefacts. Indirect and direct methods are of course non‐mutually exclusive but complementary. This review critically assesses the methods used to elucidate the effect of temperature on grape berry composition. It emphasises the limitations of studies where confounded effects are overlooked. With the focus on selected berry traits (total soluble solids, total and titratable acidity and anthocyanins), we analyse the dominant effect of temperature and highlight discrepancies and agreements between indirect and direct research methods.

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“…The interest in the wine industry is particularly pronounced because projections for warmer, dryer, longer-term changes in climate have the potential to impact all aspects of wine production (Hadarits et al, 2010;Hayman & Alexander, 2010;IPCC, 2007;. Furthermore, as some regions and varieties will see positive ripening effects (Sadras & Soar, 2009), the industry is particularly motivated to transform early in order to benefit from opportunities as well as minimise negative impacts (Stokes & Howden, 2010;Webb, Whetton, & Barlow, 2005.…”

Section: Introductionmentioning

confidence: 97%

Enhancing adaptation outcomes for transformation: climate change in the Australian wine industry

Fleming

Park

Marshall

2015

Journal of Wine Research

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As climate change progresses, an increasing number of wine industry enterprises and other resource-based enterprises will need to transform. It is therefore important for research accounts to provide contextual understandings of how transformations are occurring to help inform other stakeholders facing decisions of how, when and even if they might consider transformation. Our work provides an account of how adaptations are currently occurring in the wine industry, focusing on decision-making. Nineteen interviews with key decisionmakers from three Australian-based wine companies and surveys with 50 of their contracted winegrape suppliers operating at various points along the value chain revealed that attitudes to climate change and transformation varied. We highlight how transformation decisions require a broader set of considerations than incremental changes, taking into account stakeholder values, attitudes and supply chain position.

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Shiraz vines maintain yield in response to a 2–4°C increase in maximum temperature using an open-top heating system at key phenostages

Cited by 58 publications

References 39 publications

The viticultural system and climate change: coping with long-term trends in temperature and rainfall in Roussillon, France

The viticultural system and climate change: coping with long-term trends in temperature and rainfall in Roussillon, France

Review: critical appraisal of methods to investigate the effect of temperature on grapevine berry composition

Enhancing adaptation outcomes for transformation: climate change in the Australian wine industry

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