scholarly journals Analysis of Compounds with Oenological Interest in Somatic Variants of Grapevines

Horticulturae ◽  
2021 ◽  
Vol 8 (1) ◽  
pp. 22
Author(s):  
Ana Jiménez-Cantizano ◽  
Pau Sancho-Galán ◽  
Gerardo F. Barbero ◽  
Víctor Palacios ◽  
Antonio Amores-Arrocha
Keyword(s):  
Somatic Mutations ◽  
Principal Component ◽  
Polyphenolic Compounds ◽  
Individual Identity ◽  
Anthocyanin Content ◽  
Ripening Stage ◽  
Warm Climate ◽  
Climate Conditions ◽  
Grape Berries ◽  
Opposite Behavior

Grapevine varieties can be identified genetically by microsatellite markers. However, these molecular markers are not available to discriminate between somatic mutations that give rise to clones. Therefore, the study of compounds with oenological interest could be used to identify variability in grapevine somatic variants. In this research, sugars (glucose, fructose), acids (tartaric and malic acid) and polyphenols (22 phenolic compounds, including 13 anthocyanins) were analyzed in grape berries of two somatic variants known with different names—‘Graciano’ and ‘Tintilla de Rota’—cultivated in the same vineyard under warm climate conditions. The organic acid results show significant differences between the performance of the two accessions. Regarding phenolic compound (excluding anthocyanins) content, significant differences were observed between the two accessions. Kaempferol, caftaric acid and epicatechin were the compounds responsible for the reported differences. Differences in anthocyanin content showed opposite behavior between ‘Tintilla de Rota’ and ‘Graciano’. In this sense, ‘Graciano’ accession showed an increase in all forms of anthocyanins, with a remarkable increment of peonidin 3-O-glucoside. Principal component analysis of polyphenolic compounds revealed clearly distinguished behaviors concerning these compounds, besides showing similar tendencies between the two accessions during the ripening stage. These results could allow for the discrimination of the two accessions into somatic variants highlighting their individual identity.

scholarly journals Evaluation of Biochemical Juice Attributes and Color-Related Traits in Muscadine Grape Population

Foods ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 1101
Author(s):  
Jiovan Campbell ◽  
Ali Sarkhosh ◽  
Fariborz Habibi ◽  
Pranavkumar Gajjar ◽  
Ahmed Ismail ◽  
...  
Keyword(s):  
Principal Component ◽  
Titratable Acidity ◽  
Positive Influence ◽  
Biochemical Properties ◽  
Soluble Solids ◽  
Matrix Analysis ◽  
Anthocyanin Content ◽  
Total Anthocyanin ◽  
Color Characteristics ◽  
Muscadine Grape

Biochemical juice attributes and color-related traits of muscadine grape genotypes have been investigated. For this study, 90 muscadine genotypes, including 21 standard cultivars, 60 breeding lines, and 9 Vitis x Muscadinia hybrids (VM), were evaluated. The biochemical properties of total soluble solids (TSS), titratable acidity, and TSS/Acid (T/A) ratio showed modest diversity among genotypes with a range of 10.3 °Brix, 2.1 mg tartaric acid/L, and 4.6, respectively. Nonetheless, the pH trait exhibited a tight range of 0.74 among the population with a minimum and maximum pH of 3.11 ± 0.12 and 3.85 ± 0.12. Color-related traits showed more deviation between individuals. Total anthocyanin content (TAC), luminosity index (L*), hue angle (h°), and chroma index (C*) displayed a range of 398 µg/g DW, 33.2, 352.1, and 24, respectively. The hierarchical clustering map classified the population into two large groups of colored and non-colored grapes based on L* and h°, suggesting the predominance of these two characters among the population. The colored berries genotypes clade was further divided into several sub-clades depending on C*, TAC, and TSS levels. The principal component analysis (PCA) separated the four-color characteristics into two groups with a negative correlation between them, L* and C* versus TAC and h°. Further, PCA suggested the positive influence of acidity in enhancing the different nutraceutical components. Despite the nature of anthocyanins as a member of phenolic compounds, a lack of significant correlation between TAC and nutraceutical-related traits was detected. The dissimilatory matrix analysis highlighted the muscadine individuals C11-2-2, E16-9-1, O21-13-1, and Noble as particular genotypes among the population due to enhanced color characteristics.

scholarly journals Intergraded Applied Methodology for the Treatment of Heavy Polluted Waste Waters from Olive Oil Industries

2011 ◽  
Vol 2011 ◽  
pp. 1-14 ◽  
Author(s):  
Antonis A. Zorpas ◽  
Vassilis J. Inglezakis
Keyword(s):  
Olive Oil ◽  
Oil Production ◽  
Olive Mill Wastewater ◽  
Fenton Process ◽  
Waste Waters ◽  
Warm Climate ◽  
Climate Conditions ◽  
Integrated Method ◽  
Third Stage ◽  
Olive Mill

The annual olive oil production in Cyprus is in the range of 2700–3100 t y−1, resulting in the generation of significant amount of waste. The cocomposting of the olive oil solid residue (OOSR) and the treated wastewaters (with Fenton) from the olive oil production process with the application of reed beds has been studied as an integrated method for the treatment of wastewater containing high organic and toxic pollutants under warm climate conditions. The experimental results indicated that the olive mill wastewater (OMW) is detoxified at the end of the Fenton process. Specifically, COD is reduced up to 65% (minimum 54.32%) by the application of Fenton and another 10–28% by the application of red beds as a third stage. The final cocomposted material of OOSR with the treated olive mile wastewater (TOMW) presents optimum characteristics and is suitable for agricultural purpose.

Brix, pH and anthocyanin content determination in whole Port wine grape berries by hyperspectral imaging and neural networks

2015 ◽  
Vol 115 ◽  
pp. 88-96 ◽  
Author(s):  
Armando M. Fernandes ◽  
Camilo Franco ◽  
Ana Mendes-Ferreira ◽  
Arlete Mendes-Faia ◽  
Pedro Leal da Costa ◽  
...  
Keyword(s):  
Neural Networks ◽  
Hyperspectral Imaging ◽  
Anthocyanin Content ◽  
Wine Grape ◽  
Port Wine ◽  
Grape Berries ◽  
Content Determination

Abrupt CO2 release to the atmosphere under glacial and early interglacial climate conditions

Science ◽  
2020 ◽  
Vol 369 (6506) ◽  
pp. 1000-1005
Author(s):  
C. Nehrbass-Ahles ◽  
J. Shin ◽  
J. Schmitt ◽  
B. Bereiter ◽  
F. Joos ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Intertropical Convergence Zone ◽  
Meridional Overturning Circulation ◽  
Before Present ◽  
Freshwater Input ◽  
Warm Climate ◽  
Climate Conditions ◽  
Carbon Dioxide Release ◽  
Meridional Overturning ◽  
Co2 Release

Pulse-like carbon dioxide release to the atmosphere on centennial time scales has only been identified for the most recent glacial and deglacial periods and is thought to be absent during warmer climate conditions. Here, we present a high-resolution carbon dioxide record from 330,000 to 450,000 years before present, revealing pronounced carbon dioxide jumps (CDJ) under cold and warm climate conditions. CDJ come in two varieties that we attribute to invigoration or weakening of the Atlantic meridional overturning circulation (AMOC) and associated northward and southward shifts of the intertropical convergence zone, respectively. We find that CDJ are pervasive features of the carbon cycle that can occur during interglacial climate conditions if land ice masses are sufficiently extended to be able to disturb the AMOC by freshwater input.

scholarly journals Effect of shoot topping intensity on 'Cabernet Franc' grapevine maturity in high-altitude region

2017 ◽  
Vol 52 (10) ◽  
pp. 946-950
Author(s):  
Douglas André Würz ◽  
José Luiz Marcon Filho ◽  
Alberto Fontanella Brighenti ◽  
Ricardo Allebrandt ◽  
Betina Pereira de Bem ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Leaf Area ◽  
Soluble Solids ◽  
Anthocyanin Content ◽  
Total Polyphenol ◽  
Cabernet Franc ◽  
Grape Berries ◽  
Grape Quality ◽  
Vegetative Canopy ◽  
Different Levels

Abstract: The objective of this work was to evaluate the chemical composition of 'Cabernet Franc' grape subjected to different levels of shoot topping. The experiment was conducted in the 2008 and 2009 vintages, and the levels of shoot topping consisted of: control, without topping; and reductions of 15, 30, and 45% in total leaf area. The effect of shoot topping intensity on the chemical composition of the 'Cabernet Franc' grape berries was observed. A reduction of 26% in the vegetative canopy through a moderate shoot topping increased the total polyphenol index and the anthocyanin content. Shoot topping is a practice that must be carried out with caution, since severe shoot topping, i.e., a reduction greater than 26% of the leaf area, may negatively impact grape quality by reducing the content of soluble solids and decreasing the total polyphenol index and the content of anthocyanins of 'Cabernet Franc' grape berries.

scholarly journals Prediction of Holocene Mercury Accumulation Trends by Combining Palynological and Geochemical Records of Lake Sediments (Black Forest, Germany)

2018 ◽  
Author(s):  
Martin Schütze ◽  
Gegeensuvd Tserendorj ◽  
Marta Pérez-Rodríguez ◽  
Manfred Rösch ◽  
Harald Biester
Keyword(s):  
Principal Component Regression ◽  
Principal Component ◽  
Terrestrial Ecosystems ◽  
Forest Vegetation ◽  
Warm Climate ◽  
Black Forest ◽  
Components Analysis ◽  
Lake Systems ◽  
Hg Accumulation

Forest vegetation plays a key role in the cycling of mercury (Hg) and organic matter (OM) in terrestrial ecosystems. Litterfall has been indicated as the major transport vector of atmospheric Hg to forest soils, which is eventually transported and stored in the sediments of forest lakes. Hence, it is important to understand how changes in forest vegetation affect Hg in soil and its biogeochemical cycling in lake systems. We investigated the pollen records and the geochemical compositions of sediments from two lakes (Schurmsee and Glaswaldsee) in the Black Forest (Germany) to evaluate whether long-term shifts in forest vegetation induced by climate or land use influenced Hg accumulation in the lakes. We were particularly interested to determine whether coniferous forests were associated with a larger export of Hg to aquatic systems than deciduous forests. Principal components analysis followed by principal component regression enabled us to describe the evolution of the weight of the latent processes determining the accumulation of Hg over time. Our results emphasize that the in-lake uptake of Hg during warm climate periods, soil erosion after deforestation and emissions from mining and other human activities triggered changes in Hg accumulation during the Holocene stronger than the changes caused by forest vegetation alone.

scholarly journals Space-time variability of hydrological drought and wetness in Iran using NCEP/NCAR and GPCC datasets

2010 ◽  
Vol 14 (10) ◽  
pp. 1919-1930 ◽  
Author(s):  
T. Raziei ◽  
I. Bordi ◽  
L. S. Pereira ◽  
A. Sutera
Keyword(s):  
Time Series ◽  
Singular Spectrum Analysis ◽  
Standardized Precipitation Index ◽  
Principal Component ◽  
Reanalysis Data ◽  
Space Time ◽  
Hydrological Drought ◽  
Time Variability ◽  
Climate Conditions ◽  
Good Agreement

Abstract. Space-time variability of hydrological drought and wetness over Iran is investigated using the National Centers for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR) reanalysis and the Global Precipitation Climatology Centre (GPCC) dataset for the common period 1948–2007. The aim is to complement previous studies on the detection of long-term trends in drought/wetness time series and on the applicability of reanalysis data for drought monitoring in Iran. Climate conditions of the area are assessed through the Standardized Precipitation Index (SPI) on 24-month time scale, while Principal Component Analysis (PCA) and Varimax rotation are used for investigating drought/wetness variability, and drought regionalization, respectively. Singular Spectrum Analysis (SSA) is applied to the time series of interest to extract the leading nonlinear components and compare them with linear fittings. Differences in drought and wetness area coverage resulting from the two datasets are discussed also in relation to the change occurred in recent years. NCEP/NCAR and GPCC are in good agreement in identifying four sub-regions as principal spatial modes of drought variability. However, the climate variability in each area is not univocally represented by the two datasets: a good agreement is found for south-eastern and north-western regions, while noticeable discrepancies occur for central and Caspian sea regions. A comparison with NCEP Reanalysis II for the period 1979–2007, seems to exclude that the discrepancies are merely due to the introduction of satellite data into the reanalysis assimilation scheme.

scholarly journals Are the Winters 2010 and 2012 Archetypes Exhibiting Extreme Opposite Behavior of the North Atlantic Jet Stream?*

2013 ◽  
Vol 141 (10) ◽  
pp. 3626-3640 ◽  
Author(s):  
João A. Santos ◽  
Tim Woollings ◽  
Joaquim G. Pinto
Keyword(s):  
North Atlantic ◽  
Jet Stream ◽  
Climate Conditions ◽  
Rossby Wave Breaking ◽  
The North ◽  
Westerly Jet ◽  
Opposite Behavior ◽  
The North Atlantic ◽  
Jet Variability ◽  
North Atlantic Jet

Abstract The atmospheric circulation over the North Atlantic–European sector experienced exceptional but highly contrasting conditions in the recent 2010 and 2012 winters (November–March, with the year dated by the relevant January). Evidence is given for the remarkably different locations of the eddy-driven westerly jet over the North Atlantic. In the 2010 winter the maximum of the jet stream was systematically between 30° and 40°N (south jet regime), whereas in the 2012 winter it was predominantly located around 55°N (north jet regime). These jet features underline the occurrence of either weak flow (2010) or strong and persistent ridges throughout the troposphere (2012). This is confirmed by the very different occurrence of blocking systems over the North Atlantic, associated with episodes of strong cyclonic (anticyclonic) Rossby wave breaking in 2010 (2012) winter. These dynamical features underlie strong precipitation and temperature anomalies over parts of Europe, with detrimental impacts on many socioeconomic sectors. Despite the highly contrasting atmospheric states, mid- and high-latitude boundary conditions do not reveal strong differences in these two winters. The two winters were associated with opposite ENSO phases, but there is no causal evidence of a remote forcing from the Pacific sea surface temperatures. Finally, the exceptionality of the two winters is demonstrated in relation to the last 140 years. It is suggested that these winters may be seen as archetypes of North Atlantic jet variability under current climate conditions.

scholarly journals Grapevine as a Rich Source of Polyphenolic Compounds

Molecules ◽  
2020 ◽  
Vol 25 (23) ◽  
pp. 5604
Author(s):  
Iva Šikuten ◽  
Petra Štambuk ◽  
Željko Andabaka ◽  
Ivana Tomaz ◽  
Zvjezdana Marković ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Secondary Metabolites ◽  
Human Health ◽  
Phenolic Acids ◽  
Polyphenolic Compounds ◽  
Wine Quality ◽  
Primary And Secondary Metabolites ◽  
Grape Berries ◽  
Beneficial Effects ◽  
Grape Varieties

Grapes are rich in primary and secondary metabolites. Among the secondary metabolites, polyphenolic compounds are the most abundant in grape berries. Besides their important impacts on grape and wine quality, this class of compounds has beneficial effects on human health. Due to their antioxidant activity, polyphenols and phenolic acids can act as anti-inflammatory and anticancerogenic agents, and can modulate the immune system. In grape berries, polyphenols and phenolic acids can be located in the pericarp and seeds, but distribution differs considerably among these tissues. Although some classes of polyphenols and phenolic acids are under strict genetic control, the final content is highly influenced by environmental factors, such as climate, soil, vineyard, and management. This review aims to present the main classes of polyphenolic compounds and phenolic acids in different berry tissues and grape varieties and special emphasis on their beneficial effect on human health.

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