Applied GA 5 , GA 4 and GA 4 /7 increase berry number per bunch, yield and grape quality for winemaking in Vitis vinifera L. cv. Malbec

2021 ◽  
Author(s):  
Federico J. Berli ◽  
Rodrigo Alonso ◽  
Richard P. Pharis ◽  
Rubén Bottini
Keyword(s):  
Vitis Vinifera ◽  
Vitis Vinifera L ◽  
Grape Quality ◽  
Bunch Yield

scholarly journals Grading and Sorting of Grape Berries Using Visible-Near Infrared Spectroscopy on the Basis of Multiple Inner Quality Parameters

Sensors ◽  
2019 ◽  
Vol 19 (11) ◽  
pp. 2600 ◽  
Author(s):  
Hui Xiao ◽  
Li Feng ◽  
Dajie Song ◽  
Kang Tu ◽  
Jing Peng ◽  
...  
Keyword(s):  
Vitis Vinifera ◽  
Least Squares ◽  
Partial Least Squares ◽  
Near Infrared ◽  
Quality Parameters ◽  
Total Phenolic ◽  
Soluble Solid Content ◽  
Vitis Vinifera L ◽  
Grape Berries ◽  
Grape Quality

The potential of visible-near infrared (vis/NIR) spectroscopy (400 nm to 1100 nm) for classification of grape berries on the basis of multi inner quality parameters was investigated. Stored Vitis vinifera L. cv. Manicure Finger and Vitis vinifera L. cv. Ugni Blanc grape berries were separated into three classes based on the distribution of total soluble solid content (SSC) and total phenolic compounds (TP). Partial least squares regression (PLS) was applied to predict the quality parameters, including color space CIELAB, SSC, and TP. The prediction results showed that the vis/NIR spectrum correlated with the SSC and TP present in the intact grape berries with determination coefficient of prediction (RP2) in the range of 0.735 to 0.823. Next, the vis/NIR spectrum was used to distinguish between berries with different SSC and TP concentrations using partial least squares discrimination analysis (PLS-DA) with >77% accuracy. This study provides a method to identify stored grape quality classes based on the spectroscopy and distributions of multiple inner quality parameters.

VINEYARD MANAGEMENT TO OPTIMIZE GRAPE QUALITY IN VIRUS-FREE CLONES OF VITIS VINIFERA L.

2003 ◽  
pp. 121-126 ◽  
Author(s):  
Franco Mannini ◽  
Luca Rolle ◽  
Silvia Guidoni
Keyword(s):  
Vitis Vinifera ◽  
Vitis Vinifera L ◽  
Grape Quality ◽  
Vineyard Management

"Terroir" effect, as a result of enviromental stess, depends more on soil depth than on soil type (Vitis vinifera L. cv. Grenache Noir, Côtes du Rhône, France, 2000)

OENO One ◽  
2006 ◽  
Vol 40 (4) ◽  
pp. 177 ◽  
Author(s):  
Jacques Coipel ◽  
Begoña Rodriguez Lovelle ◽  
Catherine Sipp ◽  
Cornelis Van Leeuwen
Keyword(s):  
Vitis Vinifera ◽  
Soil Type ◽  
Soil Depth ◽  
Soil Types ◽  
Vitis Vinifera L ◽  
Anthocyanin Content ◽  
Nitrogen Status ◽  
Grape Quality ◽  
Shallow Soils ◽  
Berry Composition

<p style="text-align: justify;">Among other elements of the natural environment, soil greatly influences vine behaviour and berry composition. Its influence is complex, because soil affects vine water and mineral uptake, as well as temperature in the root zone. In this research, investigations were undertaken to assess whether vine development and grape quality potentiel could be linked to specific soil types. 15 dry farmed plots planted with Vitis vinifera L. cv. Grenache noir were studied in 2000 on five soil types of the Southern Côtes du Rhône (France). No clear relationship could be established between soil type, vine growth, yield and berry composition. However, vine water and nitrogen status were related to soil depth. On shallow soils, vine water and nitrogen status were low, which resulted in early shoot growth cessation and moderate yield, as well as high berry sugar and anthocyanin content. Severe water stress is known for affecting negatively berry ripening. Nevertheless, although this study was carried out under dry, Mediterranean conditions, the grapes with the highest potential for making quality red wines were obtained on the soils with the lowest water holding capacity.</p>

Effects of cluster thinning on anthocyanin extractability and chromatic parameters of Syrah and Tempranillo grapes and wines

OENO One ◽  
2009 ◽  
Vol 43 (1) ◽  
pp. 45 ◽  
Author(s):  
Rocío Gil-Muñoz ◽  
Rosario Vila-López ◽  
José Ignacio Fernández-Fernández ◽  
Adrián Martínez-Cutillas
Keyword(s):  
Vitis Vinifera ◽  
Alcoholic Fermentation ◽  
Climatic Conditions ◽  
Vitis Vinifera L ◽  
Grape Quality ◽  
Cluster Thinning ◽  
Commercial Vineyard ◽  
Better Than

<p style="text-align: justify;"><strong>Aims</strong>: The effects of cluster thinning on yield and extractability parameters of Syrah and Tempranillo grapes, as well as the chromatic characteristics of the wines obtained in three consecutive seasons.</p><p style="text-align: justify;"><strong>Methods and results</strong>: Grapes of Vitis vinifera L. var. Tempranillo and Syrah were harvested from a commercial vineyard in Jumilla. Two treatments were evaluated: (a) cluster thinned, where in every shoot all the clusters, except the basal one, were removed just before veraison; (b) unthinned control. Yield, physicochemical and extractability parameters were studied in the grapes. Vinifications were made from these grapes, and chromatic parameters were studied at the end of alcoholic fermentation. Results showed that cluster-thinned vines performed better than control vines during the three consecutive years of the experiment, although the best results were obtained in the driest year (2005). The Syrah variety always provided better results than the Tempranillo variety. The cluster-thinning treatment also influenced the chromatic characteristics of the wines obtained.</p><p style="text-align: justify;"><strong>Conclusions</strong>: The results showed that thinning successfully reduced yield and produced an earlier harvest in the two varieties studied. The grape quality improved and, in general, wines made from cluster-thinned vines of both Syrah and Tempranillo had significantly better chromatic characteristics than control wines.</p><p style="text-align: justify;"><strong>Significance and impact of the study</strong>: This study demonstrate that the practice of cluster-thinning may be recommended depending on several factors, as the varieties and the climatic conditions play also a role in the extractability parameters of grapes, and therefore its use cannot be generalized.</p>

scholarly journals Effects of Arthrospira platensis Extract on Physiology and Berry Traits in Vitis vinifera

Plants ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 1805
Author(s):  
Linda Salvi ◽  
Alberto Niccolai ◽  
Eleonora Cataldo ◽  
Sofia Sbraci ◽  
Francesca Paoli ◽  
...  
Keyword(s):  
Water Stress ◽  
Vitis Vinifera ◽  
Arthrospira Platensis ◽  
Vitis Vinifera L ◽  
Negative Consequences ◽  
Optimal Conditions ◽  
Gas Exchanges ◽  
Grape Quality ◽  
Leaf Gas Exchanges ◽  
Berry Composition

Several advantages on physiology, productivity, and grape quality have been reported for grapevine treated with seaweed extracts, but little is known about the importance of cyanobacterial-based biostimulants in viticulture. The purpose of this pioneering work was to analyze the broad-spectrum effects of the Arthrospiraplatensis F&M-C256 extract on Vitis vinifera L. cv. Pinot Nero grown in pots in optimal conditions and under water stress. To evaluate the effects, major physiological parameters of the plants and the quali-quantitative parameters of grape were analyzed. According to the results obtained in this study, ameliorating effects in leaf gas exchanges induced by A. platensis F&M-C256 treatments were detected in both irrigation regimes. Above all, A. platensis F&M-C256 allowed keeping stomata open without negative consequences in water potential in treated vines under water-stress conditions. In terms of berry traits, A. platensis F&M-C256-treated vines presented higher berry weight in comparison with untreated vines in both water regimes and improved berry composition in treated vines subjected to drought. The results of the present study demonstrated an A. platensis-dependent physiological response in case of abiotic stress, which prominently affects grape traits at harvest.

scholarly journals Certified clone and powdery mildew impact rotundone in red wine from Vitis vinifera L. cv. Duras N

OENO One ◽  
2015 ◽  
Vol 49 (4) ◽  
pp. 231 ◽  
Author(s):  
Olivier Geffroy ◽  
Olivier Yobrégat ◽  
Thierry Dufourcq ◽  
Tracey Siebert ◽  
Eric Serrano
Keyword(s):  
Powdery Mildew ◽  
Vitis Vinifera ◽  
Red Wine ◽  
Research Work ◽  
Experimental Unit ◽  
Vitis Vinifera L ◽  
Red Wines ◽  
Experimental Site ◽  
Grape Quality ◽  
The Impact

<p style="text-align: justify;"><strong>Aim</strong>: Few recent studies have been investigating the effect of clone on aroma compounds. The aim of this research work was to study the impact of certified clones from <em>Vitis vinifera </em>L. cv. Duras N on grape quality and rotundone, a sesquiterpene responsible for peppery aroma which has been reported recently in red wines made from this cultivar.</p><p style="text-align: justify;"><strong>Methods and results</strong>: The experimental site consisted of four consecutive rows, each row planted with one of the four certified clones of Duras N (554, 555, 627 and 654). For each clone, measurements were replicated on three experimental units per row. Each experimental unit consisted of twelve continuous vines. Rotundone concentration was measured in wines prepared by microvinification techniques (1-L Erlenmeyer flasks). For both vintages of study, rotundone concentrations were significantly higher in wines from clones 554 and 654 in comparison with clone 555, while clone 627 showed an intermediate level. In 2014, differences in powdery mildew (PM) severity on clusters were identified between the four clones and a positive logarithmic correlation (r<sup>2</sup> = 0.58) was reported on the experimental site between rotundone in wines and PM severity on grapes.</p><p style="text-align: justify;"><strong>Conclusion</strong>: Our results found differences in rotundone concentrations in wines made from the four Duras N certified clones. The results also suggested that grapevine defence response to PM could enhance rotundone production in berries. Clonal differences in susceptibility to biotic stress, such as PM, might explain the differences observed in rotundone concentrations between the four studied clones.</p><p style="text-align: justify;"><strong>Significance and impact of the study</strong>: Our results may assist grape growers to produce high quality wines with a desired aroma attribute made from Duras N. One should consider planting clone 554 in order to promote high levels of rotundone in wines made from this cultivar.</p>

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