Influence of natural variation in berry size on the volatile profiles of Vitis vinifera L. cv. Merlot and Cabernet Gernischt grapes

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.

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Genetic variability of berry size in the grapevine (Vitis vinifera L.)

Australian Journal of Grape and Wine Research ◽

10.1111/ajgw.12021 ◽

2013 ◽

Vol 19 (2) ◽

pp. 208-220 ◽

Cited By ~ 27

Author(s):

C. Houel ◽

M.-L. Martin-Magniette ◽

S.D. Nicolas ◽

T. Lacombe ◽

L. Le Cunff ◽

...

Keyword(s):

Genetic Variability ◽

Vitis Vinifera ◽

Vitis Vinifera L ◽

Berry Size

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Irrigation and Leaf Removal Effects on Polyphenolic Content of Grapes and Wines Produced from cv. â€˜Agiorgitikoâ€™ (Vitis vinifera L.)

Notulae Botanicae Horti Agrobotanici Cluj-Napoca ◽

10.15835/nbha44110254 ◽

2016 ◽

Vol 44 (1) ◽

pp. 133-139 ◽

Cited By ~ 3

Author(s):

Evangelia CHORTI ◽

Maria KYRALEOU ◽

Stamatina KALLITHRAKA ◽

Manolis PAVLIDIS ◽

Stefanos KOUNDOURAS ◽

...

Keyword(s):

Vitis Vinifera ◽

Sun Exposure ◽

Vitis Vinifera L ◽

Total Phenols ◽

Leaf Removal ◽

Total Anthocyanin ◽

Polyphenolic Composition ◽

Berry Size ◽

Significant Difference ◽

Red Grape

Vitis vinifera L. cv. â€˜Agiorgitikoâ€™ is one of the most important red grape varieties of Greece, cultivated almost exclusively in the region of Nemea in north-eastern Peloponnese. This work aimed to study the influence of some commonly applied viticultural practices on the polyphenolic composition of â€˜Agiorgitikoâ€™. Leaf removal at veraison, irrigation, and a combination of both, were applied and the phenolic content of the grapes and of the produced wines was compared. The results showed that leaf removal decreased berry size, enhanced total anthocyanin, total phenol and malvidin 3-O-monoglucoside accumulation in skins and increased the amount of extractable anthocyanins in the juice. The combination of irrigation and leaf removal caused a significant increase in total phenols in the skin and in the amount of extractable anthocyanins in juice. As far as the produced wines were concerned, color intensity, tannin content and total polyphenols were increased due to leaf removal. Both irrigation and leaf removal resulted in wines with the highest concentration of malvidin 3-O-monoglucoside, although neither practice resulted in any significant difference in anthocyanin concentration of the wines. Vines where only irrigation was applied produced berries with reduced extractable anthocyanins, increased seed total phenols and lower wine total tannins. The study showed that increasing cluster sun exposure of â€˜Agiorgitikoâ€™ vines may be, overall, beneficial to the quality of the produced wine.

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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 ◽

10.3390/foods9050666 ◽

2020 ◽

Vol 9 (5) ◽

pp. 666 ◽

Cited By ~ 1

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.

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The Effect of Water Deficit on Two Greek Vitis vinifera L. Cultivars: Physiology, Grape Composition and Gene Expression during Berry Development

Plants ◽

10.3390/plants10091947 ◽

2021 ◽

Vol 10 (9) ◽

pp. 1947

Author(s):

Anastasios Alatzas ◽

Serafeim Theocharis ◽

Dimitrios-Evangelos Miliordos ◽

Konstantina Leontaridou ◽

Angelos K. Kanellis ◽

...

Keyword(s):

Vitis Vinifera ◽

Water Deficit ◽

Expression Profile ◽

Soluble Sugars ◽

Phenylpropanoid Pathway ◽

Vitis Vinifera L ◽

Berry Development ◽

Berry Size ◽

Grape Quality ◽

Influence Of Water

Plants are exposed to numerous abiotic stresses. Drought is probably the most important of them and determines crop distribution around the world. Grapevine is considered to be a drought-resilient species, traditionally covering semiarid areas. Moreover, in the case of grapevine, moderate water deficit is known to improve the quality traits of grape berries and subsequently wine composition. However, against the backdrop of climate change, vines are expected to experience sustained water deficits which could be detrimental to both grape quality and yield. The influence of water deficit on two Greek Vitis vinifera L. cultivars, ‘Agiorgitiko’ and ‘Assyrtiko’, was investigated during the 2019 and 2020 vintages. Vine physiology measurements in irrigated and non-irrigated plants were performed at three time-points throughout berry development (green berry, veraison and harvest). Berry growth and composition were examined during ripening. According to the results, water deficit resulted in reduced berry size and increased levels of soluble sugars, total phenols and anthocyanins. The expression profile of specific genes, known to control grape color, aroma and flavor was altered by water availability during maturation in a cultivar-specific manner. In agreement with the increased concentration of phenolic compounds due to water deficit, genes of the phenylpropanoid pathway in the red-skinned Agiorgitiko exhibited higher expression levels and earlier up-regulation than in the white Assyrtiko. The expression profile of the other genes during maturation or in response to water deficit was depended on the vintage.

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