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https://www.readbyqxmd.com/read/28764015/elicitation-with-methyl-jasmonate-supported-by-precursor-feeding-with-phenylalanine-effect-on-garnacha-grape-phenolic-content
#1
Javier Portu, Rosa López, Pilar Santamaría, Teresa Garde-Cerdán
Recent works showed that elicitation, supported by precursor feeding, could be a strategy to increase phenolic content. However, these studies have never been conducted in viticulture. This strategy could be of greater interest in Garnacha, a grape variety characterized by its low phenolic content. Therefore, this work studied elicitation with methyl jasmonate (MeJ), supported by precursor feeding with phenylalanine (Phe), in order to improve Garnacha grape phenolic content. Results showed that Phe+MeJ treatment did not improve phenolic content to a greater extent than the corresponding individual treatments...
December 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28755408/effects-of-simple-rain-shelter-cultivation-on-fatty-acid-and-amino-acid-accumulation-in-chardonnay-grape-berries
#2
Nan Meng, Zhi-Yuan Ren, Xiao-Fan Yang, Qiu-Hong Pan
BACKGROUND: Fatty acids and amino acids are the precursors of aliphatic and aromatic volatile compounds, higher alcohols and esters. They are also nutrition for yeast metabolism during fermentation. However, few reports have been concerned about the effect of viticulture practices on the accumulation of fatty acids and amino acids in wine grapes. This study aimed to explore the accumulation of these compounds in developing Vitis vinifera L. cv. Chardonnay grape berries under two vintages, and compare the influences of the rain-shelter and open-field cultivation...
July 29, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28741681/climatic-potential-for-summer-and-winter-wine-production
#3
Lucas Eduardo de Oliveira Aparecido, Victor Brunini Moreto, Glauco de Souza Rolim, José Reinaldo da Silva Cabral de Moraes, Taynara Tuany Borges Valeriano, Paulo Sergio de Souza
BACKGROUD: The geoviticultural multicriteria climatic classification (MCC) system provides an efficient guide for assessing the influence of climate on wine varieties. Paraná is one of the three states in southern Brazil that has great potential for the expansion of wine production, mainly due to the conditions that favour two harvests a year. The objective was to apply the geoviticultural MCC system in two production seasons. We used maximum, mean, and minimum air temperature and precipitation for 1990-2015 for the state of Paraná...
July 25, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28736728/the-influence-of-apical-and-basal-defoliation-on-the-canopy-structure-and-biochemical-composition-of-vitis-vinifera-cv-shiraz-grapes-and-wine
#4
Pangzhen Zhang, Xiwen Wu, Sonja Needs, Di Liu, Sigfredo Fuentes, Kate Howell
Defoliation is a commonly used viticultural technique to balance the ratio between grapevine vegetation and fruit. Defoliation is conducted around the fruit zone to reduce the leaf photosynthetic area, and to increase sunlight exposure of grape bunches. Apical leaf removal is not commonly practiced, and therefore its influence on canopy structure and resultant wine aroma is not well-studied. This study quantified the influences of apical and basal defoliation on canopy structure parameters using canopy cover photography and computer vision algorithms...
2017: Frontiers in Chemistry
https://www.readbyqxmd.com/read/28680438/abscisic-acid-is-a-major-regulator-of-grape-berry-ripening-onset-new-insights-into-aba-signaling-network
#5
Stefania Pilati, Giorgia Bagagli, Paolo Sonego, Marco Moretto, Daniele Brazzale, Giulia Castorina, Laura Simoni, Chiara Tonelli, Graziano Guella, Kristof Engelen, Massimo Galbiati, Claudio Moser
Grapevine is a world-wide cultivated economically relevant crop. The process of berry ripening is non-climacteric and does not rely on the sole ethylene signal. Abscisic acid (ABA) is recognized as an important hormone of ripening inception and color development in ripening berries. In order to elucidate the effect of this signal at the molecular level, pre-véraison berries were treated ex vivo for 20 h with 0.2 mM ABA and berry skin transcriptional modulation was studied by RNA-seq after the treatment and 24 h later, in the absence of exogenous ABA...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28680428/the-induction-of-noble-rot-botrytis-cinerea-infection-during-postharvest-withering-changes-the-metabolome-of-grapevine-berries-vitis-vinifera-l-cv-garganega
#6
Stefano Negri, Arianna Lovato, Filippo Boscaini, Elisa Salvetti, Sandra Torriani, Mauro Commisso, Roberta Danzi, Maurizio Ugliano, Annalisa Polverari, Giovanni B Tornielli, Flavia Guzzo
The natural or induced development of noble rot caused by the fungus Botrytis cinerea during the late stages of grapevine (Vitis vinifera L.) berry ripening is used in some traditional viticulture areas to produce high-quality wines such as Sauternes and Tokaji. In this research, we wanted to verify if by changing the environmental conditions during post-harvest withering we could induce the noble rot development on harvested berries in order to positively change the wine produced from withered Garganega berries...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28676813/a-concise-review-on-multi-omics-data-integration-for-terroir-analysis-in-vitis-vinifera
#7
REVIEW
Pastor Jullian Fabres, Cassandra Collins, Timothy R Cavagnaro, Carlos M Rodríguez López
Vitis vinifera (grapevine) is one of the most important fruit crops, both for fresh consumption and wine and spirit production. The term terroir is frequently used in viticulture and the wine industry to relate wine sensory attributes to its geographic origin. Although, it can be cultivated in a wide range of environments, differences in growing conditions have a significant impact on fruit traits that ultimately affect wine quality. Understanding how fruit quality and yield are controlled at a molecular level in grapevine in response to environmental cues has been a major driver of research...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28671281/water-status-and-must-composition-in-grapevine-cv-chardonnay-with-different-soils-and-topography-and-a-mini-meta-analysis-of-the-%C3%AE-13-c-water-potentials-correlation
#8
Luca Brillante, Olivier Mathieu, Jean Lévêque, Cornelis van Leeuwen, Benjamin Bois
BACKGROUND: The measurement of carbon isotopic discrimination in grape sugars at harvest (δ(13) C) is an integrated assessment of water status during ripening. It is an efficient alternative to assess variability in the field and discriminate between management zones in precision viticulture, but further work is needed to completely understand the signal. RESULTS: This work, spanning over three years, performed in a hillslope toposequence in Burgundy, delineates the relationships between main soil properties (gravel amount, slope, texture) and the grapevine water status assessed by δ(13) C...
July 3, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28634482/whole-plant-temperature-manipulation-affects-flavonoid-metabolism-and-the-transcriptome-of-grapevine-berries
#9
Chiara Pastore, Silvia Dal Santo, Sara Zenoni, Nushin Movahed, Gianluca Allegro, Gabriele Valentini, Ilaria Filippetti, Giovanni Battista Tornielli
Among environmental factors, temperature is the one that poses serious threats to viticulture in the present and future scenarios of global climate change. In this work, we evaluated the effects on berry ripening of two thermal regimes, imposed from veraison to harvest. Potted vines were grown in two air-conditioned greenhouses with High Temperature (HT) and Low Temperature (LT) regimes characterized by 26 and 21°C as average and 42 and 35°C as maximum air daily temperature, respectively. We conducted analyses of the main berry compositional parameters, berry skin flavonoids and berry skin transcriptome on HT and LT berries sampled during ripening...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28610731/moscatel-vine-shoot-extracts-as-a-grapevine-biostimulant-to-enhance-wine-quality
#10
R Sánchez-Gómez, A Zalacain, F Pardo, G L Alonso, M R Salinas
Non-aromatic vine-shoot extracts (Airén) has been recently proposed as "viticultural biostimulants" when applied to grapevine. In this paper, the application of extracts from non-toasted (MVS) and toasted (MVSToasted) vine-shoots from the well-known aromatic variety such Moscatel were applied on Airén grapevine leaves, observing an increased for grape yield and wines with a lower alcohol degree. All wines at the end of the alcoholic fermentation were characterized by their fruity and floral descriptors, especially MVS wines; and 4 months later, MSV and MVSToasted wines surprised by their higher spicy notes, which correspond with the highest OAVs values for compounds such as norisoprenoids (β-damascenone), vanillin derivatives (vanillin, acetovanillone) and volatile phenols (guaiacol, syringol), compared to control wine...
August 2017: Food Research International
https://www.readbyqxmd.com/read/28607551/robust-grape-detector-based-on-svms-and-hog-features
#11
Pavel Škrabánek, Petr Doležel
Detection of grapes in real-life images is a serious task solved by researchers dealing with precision viticulture. In the case of white wine varieties, grape detectors based on SVMs classifiers, in combination with a HOG descriptor, have proven to be very efficient. Simplified versions of the detectors seem to be the best solution for practical applications. They offer the best known performance versus time-complexity ratio. As our research showed, a conversion of RGB images to grayscale format, which is implemented at an image preprocessing level, is ideal means for further improvement of performance of the detectors...
2017: Computational Intelligence and Neuroscience
https://www.readbyqxmd.com/read/28587209/variability-in-the-content-of-trans-resveratrol-trans-%C3%AE%C2%B5-viniferin-and-r2-viniferin-in-grape-cane-of-seven-vitis-vinifera-l-varieties-during-a-three-year-study
#12
Jan Tříska, Naděžda Vrchotová, Josef Balík, Ivo Soural, Radek Sotolář
Grape canes are a waste product from viticulture that show potential as an industrially extractable source of stilbenes, which are valuable for medical and other purposes. In this work, grape canes collected in three consecutive years (2014-2016) at six different places in South Moravia, Czech Republic were extracted, and the contents of trans-resveratrol, trans-ε-viniferin, and r2-viniferin were determined by high-performance liquid chromatography. The study included three blue grape varieties of Vitis vinifera L...
June 3, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28585244/characterization-of-phenolic-composition-in-carignan-noir-grapes-vitis-vinifera-l-from-six-wine-growing-sites-in-maule-valley-chile
#13
Ana M Martínez-Gil, Gastón Gutiérrez-Gamboa, Teresa Garde-Cerdán, Eva P Pérez-Álvarez, Yerko Moreno-Simunovic
BACKGROUND: Among Chilean varieties, Carignan noir has had a major resurgence due to its rediscovered wine quality potential. For this, the aim of this study was to characterize phenolic composition of grapes grown in six sites from the Maule Valley. RESULTS: The data showed that myricetin-3-glc and catechin were the most important flavonol and flavanol respectively. Anthocyanin and flavonol composition was correlated with biologically effective degree days, exhibiting a relationship with grape maturity...
June 5, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28551990/antioxidant-and-cytoprotective-activities-of-grapevine-stilbenes
#14
Benoit Biais, Stéphanie Krisa, Stéphanie Cluzet, Grégory Da Costa, Pierre Waffo-Teguo, Jean-Michel Mérillon, Tristan Richard
Grapevine stem extracts are viticulture byproducts rich in stilbenes that are increasingly studied for their potential biological activities. This study aimed to investigate some biological activities of a grape byproduct with high stilbenoid content and to point out the molecules responsible of these beneficial activities. As a consequence, the extract was subjected to a bioguided fractionation and separation by centrifugal partition chromatography. The obtained fractions were characterized by liquid chromatography coupled to mass spectrometry and nuclear magnetic resonance...
June 21, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28550468/probing-the-contractile-vacuole-as-achilles-heel-of-the-biotrophic-grapevine-pathogen-plasmopara-viticola
#15
Viktoria Tröster, Tabea Setzer, Thomas Hirth, Anna Pecina, Andreas Kortekamp, Peter Nick
The causative agent of Grapevine Downy Mildew, the oomycete Plasmopara viticola, poses a serious threat to viticulture. In the current work, the contractile vacuole of the zoospore is analysed as potential target for novel plant protection strategies. Using a combination of electron microscopy, spinning disc confocal microscopy, and video differential interference contrast microscopy, we have followed the genesis and dynamics of this vacuole required during the search for the stomata, when the non-walled zoospore is exposed to hypotonic conditions...
May 26, 2017: Protoplasma
https://www.readbyqxmd.com/read/28545224/natural-inspired-intelligent-visual-computing-and-its-application-to-viticulture
#16
Li Minn Ang, Kah Phooi Seng, Feng Lu Ge
This paper presents an investigation of natural inspired intelligent computing and its corresponding application towards visual information processing systems for viticulture. The paper has three contributions: (1) a review of visual information processing applications for viticulture; (2) the development of natural inspired computing algorithms based on artificial immune system (AIS) techniques for grape berry detection; and (3) the application of the developed algorithms towards real-world grape berry images captured in natural conditions from vineyards in Australia...
May 23, 2017: Sensors
https://www.readbyqxmd.com/read/28540490/relationship-between-viticultural-climatic-indices-and-grape-maturity-in-australia
#17
C Jarvis, E Barlow, R Darbyshire, R Eckard, I Goodwin
Historical temperature data and maturity records were analyzed for 45 vineyard blocks in 15 winegrowing regions across Australia in order to evaluate the suitability of common viticultural indices to estimate date of grape maturity. Five temperature-based viticultural indices (mean January temperature, mean growing season temperature, growing degree days, biologically effective degree days, Huglin Index) along with four springtime temperature indices (mean and maximum temperature summations for September, October, and November; growing degree days and biologically effective degree days modified to include September) were compared to maturity data in order to investigate index relationship to observed maturity timing...
May 24, 2017: International Journal of Biometeorology
https://www.readbyqxmd.com/read/28471391/the-combined-use-of-schizosaccharomyces-pombe-and-lachancea-thermotolerans-effect-on-the-anthocyanin-wine-composition
#18
Ángel Benito, Fernando Calderón, Santiago Benito
The most popular methodology to make red wine is through the combined use of Saccharomyces cerevisiae yeast and lactic acid bacteria, for alcoholic fermentation and malolactic fermentation respectively. This classic winemaking practice produces stable red wines from a microbiological point of view. This study aims to investigate a recent red winemaking biotechnology, which through the combined use of Lachancea thermotolerans and Schizosaccharomyces pombe is used as an alternative to the classic malolactic fermentation...
May 4, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28417959/genome-sequence-of-plasmopara-viticola-and-insight-into-the-pathogenic-mechanism
#19
Ling Yin, Yunhe An, Junjie Qu, Xinlong Li, Yali Zhang, Ian Dry, Huijuan Wu, Jiang Lu
Plasmopara viticola causes downy mildew disease of grapevine which is one of the most devastating diseases of viticulture worldwide. Here we report a 101.3 Mb whole genome sequence of P. viticola isolate 'JL-7-2' obtained by a combination of Illumina and PacBio sequencing technologies. The P. viticola genome contains 17,014 putative protein-coding genes and has ~26% repetitive sequences. A total of 1,301 putative secreted proteins, including 100 putative RXLR effectors and 90 CRN effectors were identified in this genome...
April 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28407189/molecular-analysis-of-genetic-diversity-among-vine-accessions-using-dna-markers
#20
A F da Costa, P E Teodoro, L L Bhering, F D Tardin, R F Daher, W F Campos, A P Viana, M G Pereira
Viticulture presents a number of economic and social advantages, such as increasing employment levels and fixing the labor force in rural areas. With the aim of initiating a program of genetic improvement in grapevine from the State University of the state of Rio de Janeiro North Darcy Ribeiro, genetic diversity between 40 genotypes (varieties, rootstock, and species of different subgenera) was evaluated using Random amplified polymorphic DNA (RAPD) molecular markers. We built a matrix of binary data, whereby the presence of a band was assigned as "1" and the absence of a band was assigned as "0...
April 13, 2017: Genetics and Molecular Research: GMR
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