scholarly journals Assessment of tempranillo grapes quality in the vineyard by Vitur score-sheet

OENO One ◽  
2008 ◽  
Vol 42 (1) ◽  
pp. 59
Author(s):  
Javier Tardáguila ◽  
Fernando Martínez de Toda
Keyword(s):  
Chemical Composition ◽  
Reliable Method ◽  
Sugar Content ◽  
Growth Yield ◽  
Titratable Acidity ◽  
Wine Industry ◽  
Vitis Vinifera L ◽  
Score Sheet ◽  
Grape Quality ◽  
Total Anthocyanins

<p style="text-align: justify;"><strong>Aims</strong>: The main objective of this study is to determine whether the Vitur score-sheet could be applied as a reliable method for assessing winegrape quality in the vineyard.</p><p style="text-align: justify;"><strong>Methods and results</strong>: Grape assessment of vineyards (Vitis vinifera L. 'Tempranillo') in the Rioja Appellation was performed by Vitur scoresheet, proposed by Tardáguila and Martínez de Toda (2005). Vegetative growth, yield components and the chemical composition of the grapes were also determined. Correlation analysis between vineyard variables and the chemical composition of the grapes were performed to identify characteristics associated with grape quality. The Vitur value was the studied parameter that displayed the best correlation with the chemical composition of the grapes. Vitur value was significantly correlated with extractable and total anthocyanins, total polyphenols index, sugar content, titratable acidity, tartaric acid and malic acid content.</p><p style="text-align: justify;"><strong>Conclusions</strong>: This article reports a new approach to winegrape assessment in the vineyard. The Vitur methodology was a fast and reliable method for assessing Tempranillo grape quality in the vineyard under Spanish conditions.</p><p style="text-align: justify;"><strong>Significance and impact of study</strong>: The results suggest that wine industry could use a Vitur methodology, as tool to classify grapes in a simple and rational manner before the harvest and winemaking</p>

scholarly journals Qualification of 'Bordô' grape clones in Vale do Rio do Peixe, in the state of Santa Catarina, Brazil

2018 ◽  
Vol 53 (7) ◽  
pp. 800-808
Author(s):  
Alberto Fontanella Brighenti ◽  
Ricardo Allebrandt ◽  
Bruno Munhoz ◽  
Diego Poletto de Matos ◽  
Murillo Albuquerque Regina ◽  
...  
Keyword(s):  
Morphological Characteristics ◽  
Titratable Acidity ◽  
The State ◽  
Soluble Solids ◽  
Alternate Bearing ◽  
Santa Catarina ◽  
Grape Quality ◽  
Total Anthocyanins ◽  
Adequate Quality ◽  
Cluster Compactness

Abstract: The objective of this work was to characterize the productive and qualitative performances of 11 clones of 'Bordô' grape (Vitis labrusca) destined to wine and juice production, in the region of Vale do Rio do Peixe, in the state of Santa Catarina, Brazil. The experiment was carried out in the 2011, 2012, 2014, and 2015 crop seasons. The analyzed yield components were: number of clusters per vine, yield, cluster weight, accumulated yield, and alternate bearing index. The analyzed morphological characteristics of clusters were: number of berries per cluster, berry diameter, cluster compactness index, and cluster length. In order to assess grape quality, the following parameters were analyzed: soluble solids (SS), pH, titratable acidity (TA), SS/TA ratio, total anthocyanins, and total polyphenols. The 'Bordô' grape clones 13 and 16 ('Paco' and 'Bocaina') are the most suitable ones for cultivation in the wine producing region of Vale do Rio do Peixe, as they show the highest yields, production stability, and grapes with adequate quality for wine and juice elaboration.

scholarly journals Advancement of `Riesling' Fruit Maturity by Paclobutrazol-induced Reduction of Lateral Shoot Growth

1992 ◽  
Vol 117 (3) ◽  
pp. 430-435 ◽  
Author(s):  
A.G. Reynolds ◽  
D.A. Wardle ◽  
A.C. Cottrell ◽  
A.P. Gaunce
Keyword(s):  
Growth Yield ◽  
Leaf Size ◽  
Titratable Acidity ◽  
Vitis Vinifera L ◽  
First Year ◽  
Total Leaf Area ◽  
Lateral Shoot ◽  
Fruit Composition ◽  
Lateral Shoots ◽  
Fruit Maturity

Paclobutrazol (PB) was sprayed on hedged `Riesling' (Vitis vinifera L.) vines at one of five concentrations (0, 1000, 2000, 3000, or 4000 mg·liter-1) as single annual applications over 3 years (1987-89). Observations were made on growth, yield, and fruit composition during the years of application and 1 year thereafter (1990) to test carryover effects. PB had no effect on vine vigor, expressed as weight of cane prunings, during the three application years, but reduced vine vigor linearly with concentration in 1990. Yield was reduced by PB in the first 2 years of the trial, while in one season cluster weight and berries per cluster were also reduced. °Brix was increased by PB during all 3 years of application; titratable acidity was reduced and pH increased in the first year of application. PB sprays significantly reduced lateral shoot length, mean leaf size on both main and lateral shoots, and total leaf area on main and lateral shoots. Winter injury to buds, cordons, and trunks was also reduced with increasing PB level. Residues of PB in fruit in the first year of application ranged from 9 μg·kg-1 at the 0-m·gliter-1 level to 638 μg·kg-1 at the 4000-mg·liter-1 level. PB shows promise as a viticultural tool for advancement of fruit maturity, with possible additional benefits such as improved vine winter hardiness. Chemical name used β -[(4-chlorophenyl) methyl]-α -dimethylethyl)-1-H-1,2,4-triazole-l-ethanol (paclobutrazol, PB).

scholarly journals Effect of the dehydration method of Hibiscus sabdariffa L. calyces on the quality of their aqueous extracts

2021 ◽  
pp. 159
Author(s):  
Yolanda Salinas Moreno ◽  
César Sánchez-Feria ◽  
María Del Carmen Ybarra-Moncada ◽  
Víctor Arturo González-Hernández ◽  
María Luisa Machuca-Sánchez
Keyword(s):  
Chemical Composition ◽  
Organic Acids ◽  
Titratable Acidity ◽  
Hibiscus Sabdariffa ◽  
Aqueous Extracts ◽  
Total Anthocyanins ◽  
Soluble Phenols ◽  
The One ◽  
Tropical Climates

Hibiscus sabdariffa L. is a plant from tropical climates, which produces, among other products, deep red calyces used to prepare refreshing drinks. The high humidity (85-87%) of the calyces at the time of harvest must be reduced to about 12% for handling and storage. The aim of the work was to evaluate the effect of the dehydration method of the calyces (sun drying, SD; air-drying, AD, at three temperatures: 50, 60 and 70 ºC) of three varieties of Hibiscus sabdariffa L. on the quality of their aqueous extracts. The quality was measured as a function of color), and chemical variables (titratable acidity, TA, total soluble phenols, TSP; total anthocyanins content TAC, and organic acids). The varieties used were Negra Quiviquinta (NQ) with dark red calyces, UAN-9 with light red calyces, and UAN-16, with white calyces. The dehydration method affected the quality of the extracts. The SD was the one that most affected the color and chemical variables. The color of the extracts was darker than that of the control while titratable acidity (TA) was reduced on average 40.6%. No effect of AD treatments was observed on these variables. On chemical composition, SD reduced TSP on average 15.3%, the most affected variety was UAN-16. In the varieties with red calyces, the average TAC reduction was 36.9%. Of the organic acids, the most affected were malic and succinic. As observed in physical variables, AD treatments showed little influence on chemical composition of calyces. Of the dehydration methods evaluated, the AD70°C rendered the best quality aqueous extract, in base of the variables evaluated.

scholarly journals The dynamics of berries quality indicators of technical kinds of grapes during a ripening period

2017 ◽  
pp. 90-96
Author(s):  
H. V. Lyashenko ◽  
O. M. Soborova
Keyword(s):  
Quality Indicators ◽  
Field Experiments ◽  
Clonal Selection ◽  
Sugar Content ◽  
Titratable Acidity ◽  
Rate Of Change ◽  
Ripening Period ◽  
Grape Quality ◽  
Main Production

The article describes the main indicators of a grapes crop quality - a sugar content in the juice of grapes and a titratable acidity, which give a special taste to the main production of technical kinds of grapes - dry wines. The methods and tools of the laboratory analysis of these indicators, as well as the methodology of a field experience are described . The results of laboratory and field experiments, conducted in 2015 in the areas of an ampelography and clonal selection department of NSC of "Institute for Winegrowing and Winemaking named after V. E. Tairov" are represented. The quality of grapes crop was determined for three grades - Odessa Muscat, Sukholimansky white and Odessa black (respectively medium, later than average and late ripening). Analysis of grape quality indicators was carried out in the dynamics during ripening (from the beginning of ripening to a technical maturity) in four replications for 40 plants on three tiers of the bush - the upper, middle and lower. It was executed the calculations of glucoacidimetric indicator (GAP) value for grades Odessa Muscat, Sukholimansky white and Odessa black. The following conclusions were obtained. The greatest rate of change of grapes quality indicators of different ripening technical kinds is observed for the grape with the lowest grade ripening period – Odessa Muscat. The resulting calculations indicate sufficient indicators value to obtain good quality wine materials for making high quality wines.

scholarly journals Research on Phenotyping and Eno-Carpological Traits of Twenty-Three New Romanian Table Grape Varieties (Vitis Vinifera L.)

2018 ◽  
Vol 1 (1) ◽  
pp. 268-275
Author(s):  
Georgeta Mihaela Bucur ◽  
Liviu Dejeu
Keyword(s):  
Sugar Content ◽  
Titratable Acidity ◽  
Frost Damage ◽  
Sugar Accumulation ◽  
Vitis Vinifera L ◽  
Absolute Minimum ◽  
Table Grapes ◽  
Berry Weight ◽  
Acid Ratio ◽  
Grape Yield

Abstract Twenty-three new Romanian table grapes varieties were analysed for their phenological behaviour, quantitative characteristics (bunch weight, berry weight, their length and width, grape yield), sugar accumulation, titratable acidity, and ºBrix / acid ratio during three consecutive years (2015-2017). The higher temperatures recorded during the study period determined an advance in the development of the main phenophases, especially the grapes’ harvest maturity. Absolute minimum temperatures during winter, damaging the vine, have significantly affected grape yield. As a consequence of earlier phenology and lower yields due to frost damage, harvest was advanced between 2 and 4 weeks than the average. The results obtained in this study favoured five remarkable genotypes for their very good quality of grape (‘Victoria’, ‘Tamina’, ‘Xenia’, ‘Napoca’ and ‘Augusta’). These varieties are distinguished by the highest values for bunch and berry weight (between 300-500 g and 5.5-8.4 g, respectively), berries’ size uniformity, the sugar content between 15.45-21.53 ºBrix and balanced ºBrix / acid ratio. Lately, the high temperatures during the grape maturation period have led to increased accumulations of sugar in berries, to reduced acidity, which affects the sugar-acidity balance; a more careful choice of grape harvest time is needed.

scholarly journals Effect of the plot variability on the qualitative and quantitative characteristics of the berry's skins and seeds of grape cultivar Agiorgitiko (Vitis vinifera L.)

2020 ◽  
Vol 2 ◽  
Author(s):  
Victoria Verarou ◽  
Maritina Stavrakaki ◽  
Ioannis Daskalakis ◽  
Despoina Bouza ◽  
Katerina Biniari
Keyword(s):  
Sugar Content ◽  
Climatic Conditions ◽  
Quality Data ◽  
Weather Data ◽  
Vitis Vinifera L ◽  
Qualitative And Quantitative ◽  
Significant Variability ◽  
Quantitative Characteristics ◽  
Total Anthocyanins ◽  
Qualitative And Quantitative Characteristics

Soil properties, climatic conditions and cultivation techniques constitute significant variables, which affect the quality of the final product. In particular, soil data (soil texture, soil electrical conductivity etc.) and weather data (average temperature, humidity etc.) affect both crop quality data (sugar content, anthocyanins content, phenolic compounds concentrations etc.) and crop quantity data (crop yield, berry weight and size etc.). The aim of this study was to investigate the variations of the microclimatic areas that exist within the same vineyard and their effect on the qualitative and quantitative characteristics of the berry skins and seeds of the grapes. These microclimatic areas could be identified and classified as those which could produce grapes for PDO wines and those which could be used for the production of other types of wines. The overall results of this study indicated important differences between the grapes of different sub-zones from the perspective of their chemical analyses, namely with notable differences identified between the grapes in the anthocyanin concentration and mainly in the concentration of malvidin, acetyl and coumaric esters of malvidin. A significant variability was observed in the characters of the must and in berry mechanical properties. More specifically, higher weight of berries was observed in the lower part of the vineyard, based on its slope. In the north-eastern part of the vineyard, a higher concentration of polyphenolic compounds was recorded. The concentration of total anthocyanins was found to be positively correlated with the soil slope, while significant variability in the concentration of total anthocyanins was revealed.

scholarly journals The relationship between the chemical composition and taste of strawberries

2021 ◽  
pp. 52-59
Author(s):  
Z. I. Arifova ◽  
A. V. Smykov
Keyword(s):  
Ascorbic Acid ◽  
Chemical Composition ◽  
Sugar Content ◽  
Titratable Acidity ◽  
Total Sugar ◽  
Biologically Active ◽  
Total Sugar Content ◽  
Fruit Flavor ◽  
The Relationship ◽  
Acid Index

The results of the evaluation of promising 24 cultivars and 6 forms of garden strawberries by their chemical composition (contents of ascorbic acid, titrated acid, sugars, dry substances, monosaccharides, the level of the sugar-acid coefficient) and the taste qualities of the fruits are presented to identify sources of high taste qualities and high content of biologically active substances. Seven cultivars and forms (Aidarina, Assol, Zarina, Efsane 3-15 Atlantida × Uniol, 12-15 Sunrise × Hercules, 25-15 Jantarnaja × Zenga Zengana) with a high fruit flavor (4.8-5.0 points);  six cultivars (Aidarina, Assol, Atlantida, Bagryana, Zarina, Present) with an increased content of ascorbic acid (76.1-85.4 mg/100 g);  eight cultivars and forms (Bagryana, Hercules, Krymskaya Remontantnaya, Luiza, Sanika, Honey, 3-15 Atlantida × Uniol, 14-15 Sunrise × Clery) with high titratable acidity (1.1-1.2%);  five cultivars (Aidarina, Albion, Bagryana, Zarina, Rusanovka) with optimal total sugar content (7.5-9.8%);  four cultivars (Albion, Bagryana, Krymskaya Remontantnaya, Uniol) with a high amount of dry matter (10.6-17.3 %);  seven cultivars and forms (Assol, Albion, Zarina, Krymskaya Rannaya, Rusanovka, 13-15 Sunrise × Zenga Zengana, 14-15 Sunrise × Clery, 25-15 Jantarnaja × Zenga Zengana) with a high sugar-acid index (8.0-11.9). The lowest variability (8.2-16.7%) was characterized by such signs as the taste of fruits and the content of total sugar, titrated acidity, and the highest (18.3-25.0%) - the content of ascorbic acid, solids, and the sugar-acid index. The most significant correlation between the sugar-acid coefficient and the biochemical parameters of strawberry fruits was revealed.

CHANGES IN THE CHEMICAL COMPOSITION OF CONCORD GRAPES GROWN IN ONTARIO DURING RIPENING IN THE 1970 SEASON

1972 ◽  
Vol 52 (6) ◽  
pp. 863-868 ◽  
Author(s):  
TIBOR FULEKI
Keyword(s):  
Chemical Composition ◽  
Titratable Acidity ◽  
The Other ◽  
Soluble Solids ◽  
Anthocyanin Content ◽  
Methyl Anthranilate ◽  
Total Anthocyanin ◽  
Total Anthocyanin Content ◽  
Total Anthocyanins ◽  
Concord Grapes

Methyl anthranilate, soluble solids, titratable acidity, pH, and total anthocyanin content of Concord grapes was followed during ripening in the 1970 season. Methyl anthranilate content increased from 0.04 ppm on 27 August to 6.44 ppm on 26 October and declined thereafter. The maximum values for the other components examined were: total anthocyanins, 114 mg/100 g (30 Oct.); soluble solids, 16.4% (13 Oct.); titratable acidity (minimum), 9.45‰ (16 Oct.); and sugar/acid, 16.93 (16 Oct.).

scholarly journals The impact of cluster thinning and leaf removal timing on the grape quality and concentration of monomeric anthocyanins in Cabernet-Sauvignon and Probus (Vitis vinifera L.) wines

OENO One ◽  
2020 ◽  
Vol 54 (1) ◽  
pp. 63-74 ◽  
Author(s):  
Dragoslav Ivanišević ◽  
Mladen Kalajdžić ◽  
Mato Drenjančević ◽  
Vladimir Puškaš ◽  
Nada Korać
Keyword(s):  
Vitis Vinifera ◽  
Titratable Acidity ◽  
Vitis Vinifera L ◽  
Cabernet Sauvignon ◽  
Leaf Removal ◽  
Time Points ◽  
Grape Quality ◽  
Cluster Thinning ◽  
The Impact ◽  
Monomeric Anthocyanins

Aim: Leaf removal around clusters and cluster thinning are techniques usually applied in cool-climate vineyards in order to achieve optimal grape maturity. However, the impact of the timing of these two operations differs across varieties. Thus, the aim of the present work was to investigate the effects of cluster thinning and leaf removal timing (performed at three specific time points) on grape quality and monomeric anthocyanins in the wines of Cabernet-Sauvignon and Probus (Kadarka × Cabernet-Sauvignon, Vitis vinifera L.)Methods and results: The experiment was conducted in Sremski Karlovci (Northern Serbia) in 2014, 2015, and 2016. Leaf removal was applied on six basal nodes of each shoot at three time points, 7 days after flowering, 30 days after flowering, and at veraison, i.e., at the onset of berry ripening. After cluster thinning, which was performed 7 days after flowering, one cluster per shoot was retained. On the treated vines, leaf removal treatment and cluster thinning were applied only once. Leaf removal was more effective than cluster thinning in respect to grape quality. Leaf removal, applied 7 and 30 days after flowering, decreased titratable acidity in Cabernet-Sauvignon, while in Probus an interaction of leaf removal and year was observed. Moreover, early leaf removal decreased the incidence of Botrytis sp. in Probus. The varieties reacted differently to cluster thinning in respect to grape quality: cluster thinning increased total soluble solids in Probus and lowered titratable acidity in Cabernet-Sauvignon. In 2015, both cluster thinning and leaf removal yielded changes in the anthocyanin ratios in the wines. Cluster thinning increased total and acylated anthocyanins in the wine of Cabernet-Sauvignon compared to wine derived from unthinned vines. The peonidin content was 40 % higher in the Cabernet-Sauvignon wine if the vines were subjected to leaf removal treatments.Conclusions: Cluster thinning and leaf removal affected both Cabernet-Sauvignon and Probus (Vitis vinifera L.) grape quality and wine composition. Early leaf removal was the most effective treatment in both varieties. Therefore, combined application of cluster thinning and early leaf removal is highly recommended in the production of high-quality red wines in Serbia.Significance and impact of the study: Timing of leaf removal application was usually investigated around flowering and veraison. Our results suggested that leaf removal between these two phenological stages also improves grape quality and changes the ratio of the monomeric anthocyanins in the wine.

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