Corinthian raisins (Vitis vinifera L., var. Apyrena) antioxidant and sugar content as affected by the drying process: a 3-year study

2018 ◽  
Vol 99 (2) ◽  
pp. 915-922 ◽  
Author(s):  
Eirini A Panagopoulou ◽  
Antonia Chiou ◽  
Eirini K Nikolidaki ◽  
Margarita Christea ◽  
Vaios T Karathanos
Keyword(s):  
Vitis Vinifera ◽  
Sugar Content ◽  
Vitis Vinifera L ◽  
Drying Process

scholarly journals Influence of Plant Growth Regulators to Improve the Colour and Sugar Content of Grapes (Vitis vinifera L.). cv. Red Globe

2021 ◽  
pp. 216-221
Author(s):  
S. Nanthakumar ◽  
V. Manju ◽  
V. Ashok Kumar
Keyword(s):  
Plant Growth ◽  
Vitis Vinifera ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Vegetative Growth ◽  
Tamil Nadu ◽  
Block Design ◽  
Sugar Content ◽  
Vitis Vinifera L ◽  
Berry Size

Studies on Effect of plant growth regulators to improve the colour and sugar content of Grapes” (Vitis vinifera L.).cv. Red Globe was conducted in the field of a progressive grape grower at Kaalampalyam (10 O 58’49.17” N and 76 O 55’ 15. 81”E   and elevation of 1352 ft from MSL) near Perur area of Coimbatore district in Tamil Nadu. The experiment was laid out in a randomized Block design with 7 treatments and each treatment was replicated four times. The data recorded on various parameters viz., vegetative growth, flowering, fruit yield, Quality etc., were statistically analysed. Significant differences were observed among the growth regulators on various vegetative growth parameters in Grapes (Vitis vinifera L.). cv. Red Globe. Among all the treatments, number of bunches per vine was significantly higher when sprayed with ethephon 200ppm (T4) compared to other treatments. (6.53 cm), the berry size and berry weight of the grapes were found to be maximum in the bunches treated with CCC 500ppm (T2) (6.57 g), There was no impact on the number of seeds by the treatments. The ethephon 200ppm (T4) treatment exhibited superior quality in terms of juice content, total sugars and colour value.

scholarly journals Influence of Grapevine Leafroll-associated Virus-3 in Mature Plants of Vitis vinifera L. cv Albariño on 110R and 196.17C Rootstocks

2021 ◽  
Vol 42 (2) ◽  
Author(s):  
C. Cabaleiro ◽  
A.M. Pesqueira ◽  
J.J. García-Berrios
Keyword(s):  
Virus Infection ◽  
Vitis Vinifera ◽  
Sugar Content ◽  
Amino Nitrogen ◽  
Vitis Vinifera L ◽  
Yield Losses ◽  
Leafroll Disease ◽  
Primary Amino ◽  
Grape Yield

The detrimental effects of grapevine leafroll disease (GLD) have been documented mainly in young plantsand little data is available on infected grapevines when they reach maturity. This study examined theinfluence of the rootstock on the effect of GLRaV-3 in a 20-year-old Vitis vinifera cv Albariño vineyard inwhich the virus has been spread by Planococcus ficus. Plants grafted on Richter 110 or Castell 196.17 withsimilar development were analysed for grapevine leafroll-associated viruses. In particular, 25 GLRaV-3-infected and 25 leafroll-free and asymptomatic vines were selected and monitored during a period of threeyears to determine grape yield and must components. Although the virus infection affected plants on bothrootstocks, it caused a greater effect on plants grafted onto 110R, with average accumulated yield losses ofup to 33%, relative to losses of 16% for plants on 196.17C. The sugar content was lower in the must frominfected plants on 110R (-2.1ºBrix) than in the must from plants on 196.17C (-1.5ºBrix). The presence ofthe virus was associated with decreased concentrations of primary amino nitrogen (PAN) and ammonium(NH4+), with the greatest effect for 110R (-35%). As 110R is the most used rootstock in Spain, particularcare must be taken to prevent the transmission of GLRaV-3 to certified virus-free plants on 110R in newvineyards. In sensitive varieties such as Albariño, particularly in areas with an active spread of the virusby mealybugs, grafting on 196.17C seems to minimise the effect that GLD has in a medium to long term.

scholarly journals Influence of Different Dehydration Levels on Volatile Profiles, Phenolic Contents and Skin Hardness of Alkaline Pre-Treated Grapes cv Muscat of Alexandria (Vitis vinifera L.)

Foods ◽  
2020 ◽  
Vol 9 (5) ◽  
pp. 666 ◽  
Author(s):  
Onofrio Corona ◽  
Diego Planeta ◽  
Paola Bambina ◽  
Simone Giacosa ◽  
Maria Alessandra Paissoni ◽  
...  
Keyword(s):  
Vitis Vinifera ◽  
Vitis Vinifera L ◽  
Drying Process ◽  
Technological Parameters ◽  
Grape Skin ◽  
Aroma Profile ◽  
Profile Modification ◽  
Phenolic Contents ◽  
Volatile Profiles ◽  
Air Speed

A dehydration experiment was carried out on Vitis vinifera L. cv Muscat of Alexandria (synonym Zibibbo) following the process for the production of renowned special dessert wines produced on Pantelleria island (Sicily, Italy). Harvested berries were pre-treated in a sodium hydroxide dipping solution (45 g/L, dipped for 185 s, 25 °C) to accelerate the drying process, rinsed, and dehydrated in simulated conditions (relative humidity 30%, 30 °C temperature, air speed 0.9 m/s). Three dehydration levels were achieved, corresponding to “Passolata”, “Bionda”, and “Malaga” stages (35%, 50%, and 65% of weight loss, respectively) of the Pantelleria denomination of origin (DOC). Grape skin mechanical properties, technological parameters, phenolics, and aroma profile varied considerably during dehydration. The most important aroma compounds for their olfactory impact, such as linalool, geraniol, nerol, and citronellol, especially in glycosylated forms, significantly increased in dried grapes compared to fresh ones, even if aroma profile modification occurred. A decrease in break skin force could have induced higher release of flavonoids. The findings showed relevant changes, allowing winemakers to better select the ratio of fresh and dehydrated grapes in the function of the final desired wine.

scholarly journals THE INFLUENCE OF MYCORRIZAL FUNGI INOCULATION ON THE GRAŠEVINA (Vitis vinifera L.) GRAPEVINE CULTIVAR’S PLANT NUTRIENT SUPPLY

Poljoprivreda ◽  
2020 ◽  
Vol 26 (2) ◽  
pp. 43-49
Author(s):  
Josip Mesić ◽  
Marko Karoglan ◽  
Sanja Slunjski ◽  
Brankica Svitlica ◽  
Ankica Budimir ◽  
...  
Keyword(s):  
Vitis Vinifera ◽  
Sugar Content ◽  
Calcium Content ◽  
Positive Influence ◽  
Nutrient Supply ◽  
Training System ◽  
Mycorrhizal Symbiosis ◽  
Vitis Vinifera L ◽  
Plant Nutrient ◽  
Phosphorus And Potassium

The aim of the study was to determine the effect of a live mycorrhizal vaccine on the dynamics of grapevine’s plant nutrient supply. The experiment was performed on the Graševina variety (Vitis vinifera L.), grafted on an SO4 rootstock in the conditions of the Kutjevo Vineyards. The training system was Guyot, with a 10‐bud load. In the root system’s immediate vicinity, 20 ml of mycorrhizal suspension containing approximately 2,000 propagation units of a live mycorrhizal mycelium were inoculated. From the viticultural aspect, the research was conducted in two climatically very different years. The first research year (2014) was characterized by an abundant precipitation and less sunny days, resulting in a later technological grape maturity, amounting to 34 days when compared to the year 2015, which was extraordinarily warm and arid during the grape ripening period. In both research years, in the conditions of the soil’s low supply with the organic matter, phosphorus, and potassium, a mycorrhizal symbiosis influenced the higher content of phosphorus and potassium in the Graševina’s dry leaf matter. In a year experiencing more precipitation and less heat, a higher nitrogen content was found in the vine leaves manifesting a mycorrhizal symbiosis. In the dry and warm conditions, the calcium content was increased during the entire period of grape ripening, and a justifiably higher content of zinc, manganese, and iron was found in the period immediately preceding a technological grape ripeness. A positive influence of mycorrhiza on the yield, sugar content, and total acidity was not determined.

Heat stress affects flowering, berry growth, sugar accumulation and photosynthesis of Vitis vinifera cv. Semillon grapevines grown in a controlled environment

2010 ◽  
Vol 37 (3) ◽  
pp. 206 ◽  
Author(s):  
Dennis H. Greer ◽  
Chris Weston
Keyword(s):  
Vitis Vinifera ◽  
Fruit Set ◽  
Leaf Growth ◽  
Sugar Content ◽  
Dry Weight ◽  
Soluble Solids ◽  
Sugar Accumulation ◽  
Vitis Vinifera L ◽  
Controlled Environments ◽  
The Impact

High temperatures during the growing season characterise many grape growing regions in Australia and elsewhere in the world, and impact on many processes including growth and berry development. To quantify the impact of heat on the Vitis vinifera L. cv. Semillon, potted vines were grown in controlled environments and exposed to a temperature regime of 40/25°C at flowering, fruit set, veraison and mid-ripening stages. Vegetative and reproductive development was measured throughout and leaf photosynthesis and stomatal conductance tracked during heat exposures. Accumulation of soluble solids was determined during ripening. Leaf growth and stem extension were unaffected by heat whereas flowers completely abscised. Berries treated at fruit set developed normally and those treated at veraison and mid-ripening stopped expanding and sugar content stopped increasing. Photosynthesis was also affected on each occasion, with rates declining by 35% and taking 12 days to recover. Up to 10 mg carbon g (berry dry weight)–1 day–1 was required for ripening after veraison. For vines heat treated at veraison and mid-ripening, net carbon acquisition rates fell to below 4 mg carbon g (leaf dry weight)–1 day–1, which is inadequate to supply berry carbon requirements. This suggests that the impacts of heat on the ripening process can be traced back to the supply of carbon.

scholarly journals Asynchronous dynamics of grapevine ("Vitis vinifera") maturation: experimental study for a modelling approach

OENO One ◽  
2009 ◽  
Vol 43 (2) ◽  
pp. 83 ◽  
Author(s):  
Iñaki García de Cortázar-Atauri ◽  
Nadine Brisson ◽  
Nathalie Ollat ◽  
Olivier Jacquet ◽  
Jean-Christophe Payan
Keyword(s):  
Vitis Vinifera ◽  
Water Content ◽  
Dry Matter ◽  
Sugar Content ◽  
Experimental Studies ◽  
Pinot Noir ◽  
Water Dynamics ◽  
Vitis Vinifera L ◽  
Dry Matter Accumulation ◽  
Grape Berries

<p style="text-align: justify;"><strong>Aims</strong>: An analysis of the asynchrony and dynamics of dry matter accumulation and water content in the grape berries growth period (Vitis vinifera L.) was carried out on a macroscopic scale (berry population). Experimental studies suggest a framework to evaluate the asynchronous nature of grapevine maturation and to propose a simple model to simulate dry matter and water dynamics.</p><p style="text-align: justify;"><strong>Methods and results</strong>:Amethodology based on the measurement of the density of the berries was used, providing information on the dry matter, water content and distribution of the berry populations during the veraison - harvest period. The main experiment was carried out in Rhone valley vineyards on the«Grenache N » and « Syrah » varieties. Additional information was gathered in Burgundy vineyards on « Pinot noir » and « Chardonnay » varieties. A relationship between the sugar content (°Brix) and water content of a berry was observed, which was robust and identical for all varieties. The asynchronous nature of berry growth was confirmed and densimetry allows quantifying the homogeneity of harvest. A model was proposed to modelling dry matter growth, based on thermal time and final potential dry weight. A single relationship was obtained for the two varieties studied which seemed to be independent of field conditions (soil and year). To model water content dynamics (or °Brix, using the relationship obtained between them), two components were defined, one of which is related to the berry phenological stage and the other depends on the water status of the plant.</p><p style="text-align: justify;"><strong>Conclusion</strong>: The results provide a conceptual framework to better understand and represent the dynamics of dry matter accumulation and water content of a population of grape berries, and to evaluate the asynchronous nature of grapevine maturity.</p><p style="text-align: justify;"><strong>Significance and impact of the study</strong>: The models and relationships proposed could be used as a tool to better identify and understand key factors and processes occurring in the field until the detailed processes of berry growth are better understood and can be incorporated into the model. This model could be incorporated into a crop model of vine growth.</p>

In vivo assessing flavonols in white grape berries (Vitis vinifera L. cv. Pinot Blanc) of different degrees of ripeness using chlorophyll fluorescence imaging

2007 ◽  
Vol 34 (12) ◽  
pp. 1092 ◽  
Author(s):  
Sándor Lenk ◽  
Claus Buschmann ◽  
Erhard E. Pfündel
Keyword(s):  
Chlorophyll Fluorescence ◽  
Vitis Vinifera ◽  
Radiation Exposure ◽  
Fluorescence Imaging ◽  
Sugar Content ◽  
Chlorophyll Degradation ◽  
Chlorophyll Fluorescence Imaging ◽  
Vitis Vinifera L ◽  
Grape Berries

Exposed and non-exposed halves of field-grown berries of the white grapevine Vitis vinifera L. cv. Pinot Blanc at various stages of ripeness were analysed using chlorophyll fluorescence imaging. The stage of ripeness was classified by the total sugar concentration which ranged between 120 and 300 g L–1 for the different berries but was similar in the exposed and the non-exposed half of individual berries. Fluorescence was excited in the UV-A and the blue spectral region and detected at red as well as far-red wavelengths. At both emission ranges, UV-excited fluorescence was weak and required correction for the contribution of small false signals. After correction, in vivo UV screening by berry skins was derived from the ratio of UV-A to blue-excited fluorescence intensities, and a relationship between in vivo UV screening and flavonol quantity was established: the quantity of flavonols was determined by spectral analysis of extracted phenolics. Significantly high flavonol concentrations, and effective in vivo UV screening, were detected in most exposed half-berries at sugar concentrations higher than 200 g L–1 but not in non-exposed samples. This suggests that radiation-exposure conditions determine flavonol synthesis. Based on the absence of flavonol accumulation in exposed half-berries with sugar concentrations smaller than 200 g L–1, however, it is suggested that berries need to arrive at an advanced stage of ripeness before responding to radiation-exposure by synthesising large amounts of UV-protecting flavonols. Chlorophyll degradation, which was followed by blue-excited intensities of far-red fluorescence, progressed in parallel with increasing sugar content suggesting that chlorophyll degradation is associated with berry ripening. In addition, exposure to sunlight appeared to slightly stimulate chlorophyll decay.

Resveratrol oligomers from Vitis Vinifera L. stems

Planta Medica ◽  
2007 ◽  
Vol 73 (09) ◽  
Author(s):  
H Amira-Guebailia ◽  
T Richard ◽  
S Rouaiguia ◽  
P Waffo Tueguo ◽  
JC Delaunay ◽  
...  
Keyword(s):  
Vitis Vinifera ◽  
Vitis Vinifera L

Biotransformation of 4-hydroxybenzoic acid in the rhizosphere of grapevine (Vitis vinifera L.)

2017 ◽  
Vol 40 (1) ◽  
pp. 95-102 ◽  
Author(s):  
B. Wang ◽  
T. Zhou1 ◽  
K. Li ◽  
X.W. Guo ◽  
Y.S. Guo ◽  
...  
Keyword(s):  
Vitis Vinifera ◽  
Vitis Vinifera L ◽  
Hydroxybenzoic Acid
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