The effects of early leaf removal and cluster thinning treatments on berry growth and grape composition in cultivars Vranac and Cabernet Sauvignon

Bogicevic, M.; Maraš, Vladislav; Mugoša, Milena; Kodžulović, V.; Raičević, Jovana; Šućur, Sanja; Failla, O.

doi:10.1186/s40538-015-0037-1

Cited by 37 publications

(25 citation statements)

References 17 publications

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“…However, it had a remarkable effect on the cluster weight, but such increase did not completely compensate the decrement in the yield weight. Our results concerning the effect of cluster thinning on yield weight and cluster weight have been confirmed by many workers (Looney and Wood, 1977;Looney, 1981;Kaps and Cahoon, 1989;Ferree et al, 2003;Dami, 2005;Reynolds et al, 2007;Gil-Muñoz et al, 2009;El-salhy et al, 2009;Kamiloglu, 2011;Zhuang et al, 2014 andBogicevic et al, 2015), they found that cluster thinning of grape cultivars reduced yield. Naor et al, 2002;Sun et al, 2012 andRescic et al, 2015 noted that the reduction of yield weight resulted from cluster thinning led to a significant increase of cluster weight.…”

Section: Discussionsupporting

confidence: 87%

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Effect of Exogenous Abscisic Acid (ABA), Gibberellic Acid (GA3) and Cluster Thinning on Yield of some Grape Cultivars

Mohamed

El-Salhy

Mostafa

et al. 2019

Journal of Plant Production

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Experiment was carried out throughout two successive seasons of 2016 and 2017 on Flame Seedless, Ruby Seedless and Thompson Seedless grapevines grown at the Experimental Orchard of Assiut University, Faculty of Agriculture. The aim of this study was to assess the impacts of abscisic acid (ABA), cluster thinning and their combinations with GA 3 on yield weight of three important grape cultivars grown under hot region. Data revealed that, the application of abscisic acid (ABA) increased yield weight (kg/vine), while cluster thinning decreased it. During the 1 st season of study (2016), all individual ABA treatments and ABA at 400 ppm combined with GA 3 at 10 ppm significantly increased yield weight (kg/vine) comparing with the control treatment. As a result of ABA treatments at 200, 400 and 600 ppm and ABA at 400 ppm plus GA 3 at 10 ppm, the yield was increased by 15.5%, 10.5%, 9.8% and 9.2%, respectively. During the 2nd season of study (2017), only ABA at 600 ppm treatment significantly surpassed the control treatment with an increment percentage of 20.5%. The rest of treatments either had no effect or reduced the yield weight comparing with the control. On the other side, cluster thinning by removing 30% of the total clusters that the vine bearing significantly reduced the yield weight (kg/vine) during the two studied seasons. As a result of such treatment, the yield was reduced by 37.2% and 39.2% in 2016 and 2017 seasons, respectively.

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Section: Discussionsupporting

confidence: 87%

“…Cluster thinning has been used for increasing berry and cluster weight and improving the quality of various grape cultivars especially the seedless ones. It applied alone or in combination with GA 3 treatments (Zhao et al, 2006;Mohamed and Shaaban, 2008;Damota et al, 2010;El-salhy et al, 2010;Mohsen, 2015 andBogicevic et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Effect of Exogenous Abscisic Acid (ABA), Gibberellic Acid (GA3) and Cluster Thinning on Yield of some Grape Cultivars

Mohamed

El-Salhy

Mostafa

et al. 2019

Journal of Plant Production

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“…Leaf removal consists of removing basal leaves around the clusters in the east or north side during grape development increasing the cluster exposure to solar radiation. It is well known that an early leaf removal (before flowering) increased total soluble solids, anthocyanins, and flavonols (Tarara et al, 2008;Diago et al, 2012;Gatti et al, 2012;Pastore et al, 2013;Bogicevic et al, 2015;Cook et al, 2015;Bubola et al, 2017). However, some authors reported increases in titratable acidity in Sangiovese (Gatti et al, 2012) and Teran (Bubola et al, 2017) cultivars while other authors found decreases in acidity with basal leaf removal on Tempranillo (Diago et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Optimal Ranges and Thresholds of Grape Berry Solar Radiation for Flavonoid Biosynthesis in Warm Climates

et al. 2020

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In commercial wine grape production, canopy management practices are applied to control the source-sink balance and improve the cluster microclimate to enhance berry composition. The aim of this study was to identify the optimal ranges of berry solar radiation exposure (exposure) for upregulation of flavonoid biosynthesis and thresholds for their degradation, to evaluate how canopy management practices such as leaf removal, shoot thinning, and a combination of both affect the grapevine (Vitis vinifera L. cv. Cabernet Sauvignon) yield components, berry composition, and flavonoid profile. Three experiments were conducted in Oakville, CA, USA. First experiment assessed changes in the grape flavonoid content driven by four degrees of exposure. In the second experiment, individual grape berries subjected to different exposures were collected from two cultivars (Cabernet Sauvignon and Petit Verdot). The third experiment consisted of an experiment with three canopy management treatments (i) LR (removal of 5 to 6 basal leaves), (ii) ST (thinned to 24 shoots per vine), and (iii) LRST (a combination of LR and ST) and an untreated control (UNT). Berry composition, flavonoid content and profiles, and 3-isobutyl 2-methoxypyrazine were monitored during berry ripening. Although increasing canopy porosity through canopy management practices can be helpful for other purposes, this may not be the case of flavonoid compounds when a certain proportion of kaempferol was achieved. Our results revealed different sensitivities to degradation within the flavonoid groups, flavonols being the only monitored group that was upregulated by solar radiation. Within different canopy management practices, the main effects were due to the ST. Under environmental conditions given in this trial, ST and LRST hastened fruit maturity; however, a clear improvement of the flavonoid compounds (i.e., greater anthocyanin) was not observed at harvest. Methoxypyrazine berry content decreased with canopy management practices studied. Although some berry traits were improved (i.e. 2.5°Brix increase in berry total soluble solids) due to canopy management practices (ST), this resulted in a four-fold increase in labor operations cost, twofold decrease in yield with a 10-fold increase in anthocyanin production cost per hectare that should be assessed together.

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“…O raleio de cacho aplicado em véraison promoveu a biossíntese de proantocianidinas em 'Vranac', enquanto que em 'Cabernet Sauvignon', o aumento dos teores de proantocianidinas foi associado a menor massa das bagas (Bogicevic et al, 2015). Com relação a 'Malbec', o raleio de cacho demonstrou efeito variado sobre flavan-3-ols em duas safras (Fanzone et al, 2011).…”

Section: /9unclassified

Características físico-químicas de uva ‘Marselan’ sob raleio de cachos na Serra do Sudeste-RS

Barros

Mello

Frölech

et al. 2019

Agraria

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AGRONOMIA (AGRONOMY)RESUMO: Este experimento teve como objetivo avaliar o efeito de diferentes intensidades de raleio de cachos nas características físico-químicas da 'Marselan' na Serra do Sudeste-RS. O estudo foi realizado na safra 2015/16 em vinhedo comercial no município de Encruzilhada do Sul. A cultivar utilizada foi a Marselan (Vitis vinifera L.) sobre porta enxerto Paulsen 1103 e espaçamento de 2,2m entre fileiras e 1m entre plantas. O delineamento experimental foi de blocos completos casualizados em esquema unifatorial, com cinco repetições. O fator de tratamento testado foi o raleio, com quatro níveis (0, 10, 30 e 50%), realizado no véraison. As variáveis avaliadas foram comprimento e massa fresca de cachos, massa fresca e número de bagas e massa fresca de ráquis. Também foi determinado o número de cachos, produção por planta e o índice de Ravaz. Foram verificadas o pH, sólidos solúveis (SS), acidez titulável (AT), a razão SS/AT, índice de polifenóis e antocianinas totais. A 'Marselan' quando submetida a 0 e 10% de raleio de cachos obteve adequado índice de Ravaz, indicando que a relação carga vegetativa está proporcional a produção por planta nesses níveis. Para todas as outras variáveis, a intensidade de raleio de cacho não proporciona incremento na qualidade da uva 'Marselan' na Serra do Sudeste-RS. Palavras-chave: índice de Ravaz; remoção de cachos; véraison; Vitis vinifera Physical chemical characteristics of 'Marselan' grape under clusters thinning in Serra do Sudeste, RS, BrazilABSTRACT: This observation, this experiment aimed to evaluate the effect of different intensities of cluster thinning in the physicochemical characteristics of 'Marselan' grape in the Serra do Sudeste, RS, Brazil. The cultivar used was the Marselan (Vitis vinifera L.) on Paulsen 1103 grafted and 2.2m spacing between rows and 1m between plants. The study was carried out in the 2015/16 harvest in a commercial vineyard in the municipality of Encruzilhada do Sul. The experimental design was a randomized complete block with five replications. The treatment factor tested was the cluster thinning, with four levels (0, 10, 30 and 50%), performed in véraison. The evaluated variables were length clusters, fresh cluster mass, fresh berries mass, number of berries, fresh rachis mass. The number of clusters, production per plant and Ravaz index were also determined pH, soluble solids (SS), titratable acidity (TA), ratio SS/TA, total polyphenol content and total anthocyanins. The 'Marselan' when submitted to 0 and 10% of cluster thinning obtained an adequate Ravaz index, indicating that the relation vegetative load is proportional to the production per plant at these levels. For all other variables, the intensity of cluster thinning does not increase the 'Marselan' grape quality in the Serra do Sudeste-RS.Características físico-químicas de uva 'Marselan' sob raleio de cachos na Serra do Sudeste-RS Rev. Bras.

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The effects of early leaf removal and cluster thinning treatments on berry growth and grape composition in cultivars Vranac and Cabernet Sauvignon

Cited by 37 publications

References 17 publications

Effect of Exogenous Abscisic Acid (ABA), Gibberellic Acid (GA3) and Cluster Thinning on Yield of some Grape Cultivars

Effect of Exogenous Abscisic Acid (ABA), Gibberellic Acid (GA3) and Cluster Thinning on Yield of some Grape Cultivars

Optimal Ranges and Thresholds of Grape Berry Solar Radiation for Flavonoid Biosynthesis in Warm Climates

Características físico-químicas de uva ‘Marselan’ sob raleio de cachos na Serra do Sudeste-RS

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