Manual and Mechanical Leaf Removal in the Bunch Zone (Vitis Vinifera L. 'Nero D'avola'): Effects on Plant Physiology, Vegetative Parameters, Yield and Grape Quality in a Warm Area

Pisciotta, Antonino; Scafidi, Pietro; Lorenzo, Rosario Di; Barbagallo, M

doi:10.17660/actahortic.2013.978.33

Cited by 5 publications

(5 citation statements)

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“…Generally, this response can influence canopy performance as shown by Candolfi-Vasconcelos and Koblet (1990) who reported that early defoliation caused an increase in leaf photosynthetic efficiency in the remaining leaves. This compensated for the stress of the early reduction in source/sink ratio (Pisciotta et al, 2013). In our trial, the effect explains the best photosynthetic efficiency expressed in terms of SPAD values registered in the main and lateral leaves of defoliated vines.…”

Section: Discussionsupporting

confidence: 49%

“…However, this effect may not be strong because grapes have great resilience, showing compensatory increases in lateral growth and in the photosynthetic efficiency of younger leaves (Reynolds and Wardle, 1989). Meanwhile, fruit quality parameters are positively affected by EBD and are key to the oenological wine profile as measured by the fruit's biochemical characteristics (Feng et al, 2017;Pisciotta et al, 2013). Increases in bunch exposure are generally associated with increases in the ratio of total soluble solids/titratable acidity (Pastore et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…Effects of increased light exposure on berry flavonoids are unclear. Lemut et al (2013) found that increased light has a positive effect on flavonoid synthesis while others have reported decreased levels of these compounds (Spayd et al, 2002;Tarara et al, 2008;Pisciotta et al, 2013;Scafidi et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Early defoliation effects on water status, fruit yield and must quality of ‘Nerello mascalese’ grapes

Ferlito

Allegra

Torrisi

et al. 2020

Sci. agric. (Piracicaba, Braz.)

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The effect of basal zone defoliation on vines influences yield and ripening depending on the phenological stage and its intensity. Early basal defoliation (EBD) was carried out at flowering on the autochthonous Vitis vinifera (L.) cultivar 'Nerello mascalese' grown on the eastern slopes of Mount Etna, Sicily. The effects were evaluated over a two-year period. In the first year, the canopy retained 67 % of its original leaf area after EBD and in the second year, 58 %. Compared with control vines, midday leaf water potentials in the EBD vines enjoyed higher water status throughout the growing seasons in both years. EBD had no significant negative effects on yield but did have significant positive effects on the levels of total polyphenols, total flavonols and total anthocyanins. Yield and its components are conditioned by a number of factors mainly linked to climate and to the vines' general condition during berry growth and ripening. Even after two consecutive years of treatment, EBD does not have any negative effects on yield. However, EBD does have strong positive effects on berry quality attributes as a consequence of the following: greater exposure of the cluster to sunlight, higher vine water status and avoidance of high temperature stresses in the last phase of ripening during the analysis of anthocyanin.

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Section: Discussionsupporting

confidence: 49%

Section: Introductionmentioning

confidence: 99%

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Early defoliation effects on water status, fruit yield and must quality of ‘Nerello mascalese’ grapes

Ferlito

Allegra

Torrisi

et al. 2020

Sci. agric. (Piracicaba, Braz.)

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“…The growing demand for wines with moderate alcohol content is leading to a reappraisal of current production systems as well as management techniques. Vineyard management practices are able to increase, stabilize, or slow maturation [6][7][8][9][10], and grapevine phenology is predominantly temperature-driven [11,12]. Matching the critical developmental stages of grapevines to a suitable climate is a fundamental factor in the planning of new vineyards where optimizing quality is a priority.…”

Section: Introductionmentioning

confidence: 99%

Anti-Transpirant Effects on Vine Physiology, Berry and Wine Composition of cv. Aglianico (Vitis vinifera L.) Grown in South Italy

et al. 2019

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In viticulture, global warming requires reconsideration of current production models. At the base of this need there are some emerging phenomena: modification of phenological phases; acceleration of the maturation process of grapes, with significant increases in the concentration of sugar musts; decoupling between technological grape maturity and phenolic maturity. The aim of our study was to evaluate the effect of a natural anti-transpirant on grapevine physiology, berry, and wine composition of Aglianico cultivar. For two years, Aglianico vines were treated at veraison with the anti-transpirant Vapor Gard and compared with a control sprayed with only water. A bunch thinning was also applied to both treatments. The effectiveness of Vapor Gard were assessed through measurements of net photosynthesis and transpiration and analyzing the vegetative, productive and qualitative parameters. The results demonstrate that the application of anti-transpirant reduced assimilation and transpiration rate, stomatal conductance, berry sugar accumulation, and wine alcohol content. No significant differences between treatments were observed for other berry and wine compositional parameters. This method may be a useful tool to reduce berry sugar content and to produce wines with a lower alcohol content.

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“…In fact, fruit response to sunlight is closely related to berry temperature, which increases linearly with sunlight exposure. 15 -18 The effects of 'traditional' leaf removal on Nero d'Avola plant physiology, vegetative parameters, yield and grape quality were studied by Pisciotta et al 19 The authors observed that the photosynthetic activity of primary leaves was higher in leaf removal treatments than in non-defoliated plants; moreover, leaf removal had an effect on total anthocyanins and flavonoids content, even if it did not significantly modify grape quality.…”

Section: Introductionmentioning

confidence: 99%

Leaf removal and wine composition of Vitis vinifera L. cv. Nero d'Avola: the volatile aroma constituents

et al. 2015

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'Early' leaf removal can lead to a positive effect on the quality of Nero d'Avola under the environmental conditions in which the present study was undertaken but particular attention has to be given to the time of grape harvest. The results also demonstrate that 'early' defoliation can be applied to improve wine quality in the Mediterranean region, where there is a concentration of rainfall during winter, and nearly arid conditions and high temperatures during the summer.

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Manual and Mechanical Leaf Removal in the Bunch Zone (Vitis Vinifera L. 'Nero D'avola'): Effects on Plant Physiology, Vegetative Parameters, Yield and Grape Quality in a Warm Area

Cited by 5 publications

References 0 publications

Early defoliation effects on water status, fruit yield and must quality of ‘Nerello mascalese’ grapes

Early defoliation effects on water status, fruit yield and must quality of ‘Nerello mascalese’ grapes

Anti-Transpirant Effects on Vine Physiology, Berry and Wine Composition of cv. Aglianico (Vitis vinifera L.) Grown in South Italy

Leaf removal and wine composition of Vitis vinifera L. cv. Nero d'Avola: the volatile aroma constituents

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