Effects of temperature and light (before and after budburst) on inflorescence morphology and flower number of Chardonnay grapevines (Vitis vinifera L.)

Petrie, Paul R.; Clingeleffer, Peter R.

doi:10.1111/j.1755-0238.2005.tb00279.x

Cited by 76 publications

(59 citation statements)

References 9 publications

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“…This is the period when the final number of florets per inflorescence is determined by the environmental conditions and the reserve status of the vine (Vasconcelos et al 2009). It was also shown that higher temperature during the 2 weeks before budburst reduced the number of florets per inflorescence and the temperature influence on florets differentiation weakened as budburst advanced (Petrie and Clingeleffer 2005). From the middle of March 2012, the maximum air temperature fluctuated from 24 to 29°C for a week, which coincided to 2 weeks before budburst.…”

Section: Discussionmentioning

confidence: 96%

Identification of a defoliation severity threshold for changing fruitset, bunch morphology and fruit composition in Pinot Noir

Acimovic

Tozzini

Green

et al. 2016

Australian Journal of Grape and Wine Research

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Background and Aims: Early defoliation has been proposed as a tool to reduce bunch susceptibility to fungal infections through a reduction in bunch compactness. This research aims to determine the desired level of defoliation producing looser bunches and to investigate the impact of the application of early defoliation on Pinot Noir vines under cool climate conditions. Methods and Results: We applied leaf removal treatments at full flowering or EL-20 phenological stage on Pinot Noir in 2 consecutive years using five levels of defoliation: no leaves removed, and leaves removed from four, six, eight and ten basal nodes. The effects on fruitset, bunch morphology, fruit chemistry, yield and rot severity were recorded. We identified the defoliation of eight basal nodes as the threshold resulting in significantly lower fruitset. The removal of eight or ten leaves reduced bunch compactness but did not alter the proportion of rot. Finally, fruit composition at harvest of the treated vines was found to be improved compared with that of the control vines. Conclusions: The defoliation of six to eight basal nodes at full flowering can regulate fruitset and bunch compactness in Pinot Noir under cool climate conditions. Application over 2 years showed no adverse effects on bud fruitfulness or vine performance the following year. Significance of the Study: Early leaf removal can be an efficient tool to alter bunch architecture, yield and fruit composition without impacting vine health.

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Section: Discussionmentioning

confidence: 96%

Identification of a defoliation severity threshold for changing fruitset, bunch morphology and fruit composition in Pinot Noir

Acimovic

Tozzini

Green

et al. 2016

Australian Journal of Grape and Wine Research

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show abstract

“…Hence it is important that more research is undertaken to link environmental cues with effects on bunch number. Petrie and Clingeleffer (2005) in a field study with Chardonnay, found a strong negative correlation between temperature and flower number (R 2 = 0.81). The period during which budburst occurs appears to be a critical period which is poorly understood.…”

Section: Long-term Trends In Yield and Compositionmentioning

confidence: 95%

Plant management research: status and what it can offer to address challenges and limitations

Clingeleffer

2010

Australian Journal of Grape and Wine Research

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Seasonal fluctuations in yield, grape composition and wine attributes, largely driven by variable climatic conditions, are major challenges for the wine industry aiming to meet consumer expectations for consistent supply, wine style and product quality. This paper will address known causes for this variability and identify management techniques, together with their limitations, that offer potential to modulate these responses. Results will be presented from research studies, conducted over a number of seasons, which link vineyard management practices with fruit composition and wine assessments. They show that there is potential to develop integrated systems to stabilise yield, fruit composition and wine quality attributes across seasons. These techniques include lighter pruning, deficit irrigation techniques and adoption of low‐moderate vigour rootstocks which lead to reduced shoot vigour and the development of open canopies and small bunches with small berries, with enhanced colour, phenolics and sensory appeal; application of mechanical and chemical crop thinning techniques for yield stabilisation and promotion of early ripeness, colour and flavour development. However, the results also show that variability between seasons in many cases is much larger than can be achieved by modifying management practices. Hence, opportunities to use management practices to completely reduce the seasonal variability, particularly with respect to grape composition and wine attributes, factors largely affected by climatic conditions during berry development, may be limited. There exists significant potential in the longer term to use new varieties and rootstocks better adapted to variable and changing climatic conditions. It can be concluded that vineyard practices can be modified to stabilise yield, grape composition and wine attributes to varying degrees and hence, minimise the impact of variability in climatic conditions from season to season. In the longer term, the adoption of new varieties together with new rootstocks adapted to higher temperatures and limited water supply will assist the wine industry to cope with impacts of climate variability and change and address ever changing consumer expectations. A total systems approach to vineyard management offers potential to modulate seasonal fluctuations in yield, grape composition and wine quality attributes with significant benefit for an industry.

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“…At plant's level, female meiosis overlaps the transition between reserve mobilization from perennial organs (roots, trunk, and canes) towards efficient leaf photosynthesis. During this delicate period, any interruption or partial decline of sugar supply, as result of environmental stress, might result in excessive flower abortion [16,18]. For instance, cold stress impacts carbon metabolism leading to ovule abortion and fruit set reduction [19,20].…”

Section: Introductionmentioning

confidence: 98%

Cold-night responses in grapevine inflorescences

et al. 2015

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Effects of temperature and light (before and after budburst) on inflorescence morphology and flower number of Chardonnay grapevines (Vitis vinifera L.)

Cited by 76 publications

References 9 publications

Identification of a defoliation severity threshold for changing fruitset, bunch morphology and fruit composition in Pinot Noir

Identification of a defoliation severity threshold for changing fruitset, bunch morphology and fruit composition in Pinot Noir

Plant management research: status and what it can offer to address challenges and limitations

Cold-night responses in grapevine inflorescences

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