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.

"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>

scholarly journals Regulation of secondary metabolism in Vitis vinifera by an extract of A.nosodum effects of physiology and grape quality

2019 ◽  
Vol 13 ◽  
pp. 03004
Author(s):  
Linda Salvi ◽  
Cecilia Brunetti ◽  
Giovan Battista Mattii
Keyword(s):  
Vitis Vinifera ◽  
Global Climate ◽  
Phenylpropanoid Pathway ◽  
Stress Factors ◽  
Stem Water Potential ◽  
Gas Exchanges ◽  
Physiological Processes ◽  
Grape Quality ◽  
Leaf Gas Exchanges ◽  
Depth Analysis

Heat and drought are major abiotic stresses that impact on many Vitis vinifera physiological processes and berry development, especially as global climate change is speeding up the expected frequency and severity of both stress factors. Nevertheless, seaweed extracts might represent a strategy to confer to treated plants the capability to be more prone to counteract short-term periods of severe stresses. In this paper, we report the effects of foliar treatments with an Ascophyllum nodosum extract on physiological and biochemical parameters of grapevine. In our study performed in the 2016 season in open field in Tuscany, we assessed differences in leaf gas exchanges, chlorophyll fluorescence and midday stem water potential between treated and untreated vines. In addition, the in-depth analysis of anthocyanins and flavonols in berries presented within the work adds significantly to our knowledge of the influence of seaweed extract on the phenylpropanoid pathway. Moreover, our work witness the treatment-promoting greater tolerance to stress in vines, and support previous studies that hypothesize an influence of treatments with algae extracts on qualitative characteristics in V.vinifera.

scholarly journals Leaf-to-Fruit Ratios in Vitis vinifera L. cv. “Sauvignon Blanc”, “Carmenère”, “Cabernet Sauvignon”, and “Syrah” Growing in Maule Valley (Chile): Influence on Yield and Fruit Composition

Agriculture ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 176
Author(s):  
Gastón Gutiérrez-Gamboa ◽  
Irina Díaz-Galvéz ◽  
Nicolás Verdugo-Vásquez ◽  
Yerko Moreno-Simunovic
Keyword(s):  
Vitis Vinifera ◽  
Yield Components ◽  
Soluble Solids ◽  
Vitis Vinifera L ◽  
Cabernet Sauvignon ◽  
Clear Trend ◽  
Total Polyphenol ◽  
Sauvignon Blanc ◽  
Fruit Composition ◽  
Berry Composition

A trial was conducted during the 2005–2006 season in order to determine the effects of different leaf-to-fruit ratios on yield components and fruit composition in four Vitis vinifera L. cultivars. The treatments consisted of selecting shoots of four lengths (>1.3 m, 1.3–0.8 m, 0.8–0.4 m, and <0.4 m) with two crop levels (1–2 clusters/shoot), which allowed defining eight ratios. Berry composition and yield components were measured. The treatments affected the accumulation of soluble solids in “Sauvignon blanc”, “Cabernet Sauvignon”, and “Syrah”, delaying it as the ratio decreased. All yield components were affected in “Sauvignon blanc”, while bunch weight and the number of berries per bunch were altered without a clear trend. None of the yield components were affected in “Cabernet Sauvignon”, while the lowest ratio presented the lowest number of berries per bunch in “Syrah”. Total polyphenol index (TPI) was affected in “Carmenère” without a clear trend. A highly significant correlation was found between shoot length and leaf area in all studied cultivars. As the ratio increased, the shoot lignification increased in “Sauvignon blanc”. However, studies must be conducted during more seasons to establish better conclusions about the effects of leaf-to-fruit ratios on yield and fruit composition.

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