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https://www.readbyqxmd.com/read/28717999/macro-and-microclimate-conditions-may-alter-grapevine-deacclimation-variation-in-thermal-amplitude-in-two-contrasting-wine-regions-from-north-and-south-america
#1
Francisco Gonzalez Antivilo, Rosalía Cristina Paz, Markus Keller, Roberto Borgo, Jorge Tognetti, Fidel Roig Juñent
Low temperature is a limiting factor that affects vineyard distribution globally. The level of cold hardiness acquired during the dormant season by Vitis sp. is crucial for winter survival. Most research published on this topic has been generated beyond 40° N latitude, where daily mean temperatures may attain injurious levels during the dormant season resulting in significant damage to vines and buds. Symptoms of cold injury have been identified in Mendoza (32-35° S latitude), a Southern Hemisphere wine region characterized by a high thermal amplitude, and warm winds during the dormant season...
July 17, 2017: International Journal of Biometeorology
https://www.readbyqxmd.com/read/28702038/neofusicoccum-parvum-colonization-of-the-grapevine-woody-stem-triggers-asynchronous-host-responses-at-the-site-of-infection-and-in-the-leaves
#2
Mélanie Massonnet, Rosa Figueroa-Balderas, Erin R A Galarneau, Shiho Miki, Daniel P Lawrence, Qiang Sun, Christopher M Wallis, Kendra Baumgartner, Dario Cantu
Grapevine trunk diseases cause important economic losses in vineyards worldwide. Neofusicoccum parvum, one of the most aggressive causal agents of the trunk disease Botryosphaeria dieback, colonizes cells and tissues of the grapevine wood, leading to the formation of an internal canker. Symptoms then extend to distal shoots, with wilting of leaves and bud mortality. Our aim was to characterize the transcriptional dynamics of grapevine genes in the woody stem and in the leaves during Neofusicoccum parvum colonization...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28688348/characterization-of-iron-deficiency-symptoms-in-grapevine-vitis-spp-leaves-by-reflectance-spectroscopy
#3
Laura Rustioni, Daniele Grossi, Lucio Brancadoro, Osvaldo Failla
The work aims at the description of the iron deficiency symptoms in grapevine leaves by reflectance spectroscopy at the plant and leaf levels. 5 genotypes of Vitis spp. were selected and grown in hydroponic conditions with and without iron supply. 450 spectra were collected among basal, young and apical leaves, as well as veins and interveinal areas. Iron deficiency produced significant and characteristic modifications in the pigment accumulation, proportion and distribution in plants. Basal leaves resulted to have higher concentrations of photosynthetic pigments in stressed plants with respect to the control, probably due to compensation effects...
June 30, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28686140/an-analysis-of-the-complete-genome-sequence-and-subgenomic-rnas-reveals-unique-features-of-the-ampelovirus-grapevine-leafroll-associated-virus-1
#4
Bhanu Priya Donda, Sridhar Jarugula, Rayapati A Naidu
Despite being the first closterovirus documented in grapevines (Vitis sp.), the molecular biology of Grapevine leafroll-associated virus 1 (GLRaV-1, genus Ampelovirus, family Closteroviridae) is still in its infancy. In this study, the complete genome sequence of two GLRaV-1 isolates was determined to be 18,731 (isolate WA-CH) and 18,946 (isolate WA-PN) nucleotides (nt). The genome of WA-CH and WA-PN isolates encodes nine putative open reading frames (ORFs) and the arrangement of these ORFs in both isolates was similar to that of Australian and Canadian isolates...
July 7, 2017: Phytopathology
https://www.readbyqxmd.com/read/28672864/vicarious-calibration-of-suas-microbolometer-temperature-imagery-for-estimation-of-radiometric-land-surface-temperature
#5
Alfonso Torres-Rua
In recent years, the availability of lightweight microbolometer thermal cameras compatible with small unmanned aerial systems (sUAS) has allowed their use in diverse scientific and management activities that require sub-meter pixel resolution. Nevertheless, as with sensors already used in temperature remote sensing (e.g., Landsat satellites), a radiance atmospheric correction is necessary to estimate land surface temperature. This is because atmospheric conditions at any sUAS flight elevation will have an adverse impact on the image accuracy, derived calculations, and study replicability using the microbolometer technology...
June 26, 2017: Sensors
https://www.readbyqxmd.com/read/28667801/a-study-of-selected-factors-affecting-efficacy-of-compost-tea-against-several-fungal-pathogens-of-potato
#6
W K Mengesha, W M Gill, S M Powell, K J Evans, K M Barry
AIM: To investigate selected factors of two non-aerated compost teas and mechanisms that influence the restriction of several fungal potato pathogens. METHODS AND RESULTS: Two non-aerated compost teas (NCTs, commercial compost, CCT; vineyard compost, VCT) were tested for their ability to suppress potato pathogens. The VCT was more suppressive than CCT to mycelial growth of A. solani and R. solani isolate 299, but not for R. solani isolate 422. Metagenomic studies of microbial diversity revealed that the CCT had higher fungal and bacterial diversity and richness than the VCT...
July 1, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28655216/phenotypic-and-genomic-survey-on-organic-acid-utilization-profile-of-pseudomonas-mendocina-strain-s5-2-a-vineyard-soil-isolate
#7
Teik Min Chong, Jian-Woon Chen, Wah-Seng See-Too, Choo-Yee Yu, Geik-Yong Ang, Yan Lue Lim, Wai-Fong Yin, Catherine Grandclément, Denis Faure, Yves Dessaux, Kok-Gan Chan
Root exudates are chemical compounds that are released from living plant roots and provide significant energy, carbon, nitrogen and phosphorus sources for microbes inhabiting the rhizosphere. The exudates shape the microflora associated with the plant, as well as influences the plant health and productivity. Therefore, a better understanding of the trophic link that is established between the plant and the associated bacteria is necessary. In this study, a comprehensive survey on the utilization of grapevine and rootstock related organic acids were conducted on a vineyard soil isolate which is Pseudomonas mendocina strain S5...
December 2017: AMB Express
https://www.readbyqxmd.com/read/28652263/transcriptomic-differences-in-grapevine-varieties-correlate-with-berry-anthocyanin-skin
#8
Mélanie Massonnet, Marianna Fasoli, Giovanni Battista Tornielli, Mario Altieri, Marco Sandri, Paola Zuccolotto, Paola Paci, Massimo Gardiman, Sara Zenoni, Mario Pezzotti
Grapevine berry development involves a succession of physiological and biochemical changes reflecting the transcriptional modulation of thousands of genes. Although recent studies have investigated the dynamic transcriptome during berry development, most have focused on a single grapevine variety so there is a lack of comparative data representing different cultivars. Here we report the first genome-wide transcriptional analysis of 120 RNA samples corresponding to 10 Italian grapevine varieties collected at four growth stages...
June 26, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28651557/amphibian-and-reptile-road-kills-on-tertiary-roads-in-relation-to-landscape-structure-using-a-citizen-science-approach-with-open-access-land-cover-data
#9
Florian Heigl, Kathrin Horvath, Gregor Laaha, Johann G Zaller
BACKGROUND: Amphibians and reptiles are among the most endangered vertebrate species worldwide. However, little is known how they are affected by road-kills on tertiary roads and whether the surrounding landscape structure can explain road-kill patterns. The aim of our study was to examine the applicability of open-access remote sensing data for a large-scale citizen science approach to describe spatial patterns of road-killed amphibians and reptiles on tertiary roads. Using a citizen science app we monitored road-kills of amphibians and reptiles along 97...
June 26, 2017: BMC Ecology
https://www.readbyqxmd.com/read/28648287/biodiversity-and-ochratoxin-a-profile-of-aspergillus-section-nigri-populations-isolated-from-wine-grapes-in-cyprus-vineyards
#10
Iakovos S Pantelides, Efi Aristeidou, Maria Lazari, Maria-Dimitra Tsolakidou, Dimitris Tsaltas, Maria Christofidou, Demetris Kafouris, Eftychia Christou, Nicolas Ioannou
The objective of this study was to evaluate the biodiversity of Aspergillus section Nigri populations from Cyprus vineyards by morphological, toxigenic and phylogenetic analysis. Aspergillus section Nigri populations were isolated from grapes of the varieties 'Maratheftiko' and 'Cabernet Sauvignon' originating from six growing regions of Cyprus during 2010 and 2011 years. The isolation frequency of Aspergillus section Nigri from grape samples was 43.3% and a total of 284 isolates were selected for further analyses based on the macroscopic characteristics of black aspergilli...
October 2017: Food Microbiology
https://www.readbyqxmd.com/read/28623799/assessment-of-species-specific-and-temporal-variations-of-major-trace-and-rare-earth-elements-in-vineyard-ambient-using-moss-bags
#11
Tijana Milićević, Mira Aničić Urošević, Gordana Vuković, Sandra Škrivanj, Dubravka Relić, Marina V Frontasyeva, Aleksandar Popović
Since the methodological parameters of moss bag biomonitoring have rarely been investigated for the application in agricultural areas, two mosses, Sphagnum girgensohnii (a species of the most recommended biomonitoring genus) and Hypnum cupressiforme (commonly available), were verified in a vineyard ambient. The moss bags were exposed along transects in six vineyard parcels during the grapevine season (March‒September 2015). To select an appropriate period for the reliable 'signal' of the element enrichment in the mosses, the bags were simultaneously exposed during five periods (3 × 2 months, 1 × 4 months, and 1 × 6 months)...
June 15, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28616068/genetic-diversity-and-structure-of-lolium-perenne-ssp-multiflorum-in-california-vineyards-and-orchards-indicate-potential-for-spread-of-herbicide-resistance-via-gene-flow
#12
Elizabeth Karn, Marie Jasieniuk
Management of agroecosystems with herbicides imposes strong selection pressures on weedy plants leading to the evolution of resistance against those herbicides. Resistance to glyphosate in populations of Lolium perenne L. ssp. multiflorum is increasingly common in California, USA, causing economic losses and the loss of effective management tools. To gain insights into the recent evolution of glyphosate resistance in L. perenne in perennial cropping systems of northwest California and to inform management, we investigated the frequency of glyphosate resistance and the genetic diversity and structure of 14 populations...
July 2017: Evolutionary Applications
https://www.readbyqxmd.com/read/28616012/corrigendum-from-vineyard-soil-to-wine-fermentation-microbiome-approximations-to-explain-the-terroir-concept
#13
Ignacio Belda, Iratxe Zarraonaindia, Matthew Perisin, Antonio Palacios, Alberto Acedo
[This corrects the article on p. 821 in vol. 8, PMID: 28533770.].
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28611795/grape-composition-under-abiotic-constrains-water-stress-and-salinity
#14
REVIEW
José M Mirás-Avalos, Diego S Intrigliolo
Water stress and increasing soil salt concentration represent the most common abiotic constrains that exert a negative impact on Mediterranean vineyards performance. However, several studies have proven that deficit irrigation strategies are able to improve grape composition. In contrast, irrigation with saline waters negatively affected yield and grape composition, although the magnitude of these effects depended on the cultivar, rootstock, phenological stage when water was applied, as well as on the salt concentration in the irrigation water...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28608474/association-between-ants-hymenoptera-formicidae-and-the-vine-mealybug-hemiptera-pseudococcidae-in-table-grape-vineyards-in-eastern-spain
#15
Aleixandre Beltrà, Cristina Navarro-Campos, Altea Calabuig, Luis Estopà, Felix L Wäckers, Apostolos Pekas, Antonia Soto
BACKGROUND: The vine mealybug, Planococcus ficus (Signoret) (Hemiptera: Pseudococcidae) is a key pest of grapevine in the Mediterranean Basin. Some honeydew collecting ant species are known to increase mealybug populations in other grape-growing regions. However, there is scarce information on either the ant species present in Mediterranean vineyards or their impact on mealybugs. We conducted a study in four commercial vineyards in Eastern Spain in order to i) identify the ant species foraging on the vine canopies, ii) study the association among ant activity, vine mealybug abundance and fruit damage, and iii) test a novel method for ant management, distracting ants from guarding vine mealybugs by providing artificial sugars...
June 12, 2017: Pest Management Science
https://www.readbyqxmd.com/read/28602091/assessing-spatial-variability-of-grape-skin-flavonoids-at-the-vineyard-scale-based-on-plant-water-status-mapping
#16
Luca Brillante, Johann Martínez-Luscher, Runze Yu, Cassandra M Plank, Luis Sanchez, Terrence L Bates, Charles Brenneman, Anita Oberholster, S Kaan Kurtural
Plant water stress affects grape (Vitis vinifera L. cv. Cabernet Sauvignon) berry composition and is variable in space due to variations in the physical environment at the growing site. We monitored the natural variability of grapevine water stress by stem water potential (Ψstem) and leaf gas exchange in an equi-distant grid in a commercial vineyard. Spatial differences were measured and related to topographical variation by modeling. Geospatial analysis and clustering allowed researchers to differentiate the vineyard block into two distinct zones having severe and moderate water stress where it varied by 0...
July 5, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28598532/ptr-ms-volatile-profiling-of-pinot-noir-wines-for-the-investigation-of-differences-based-on-vineyard-site
#17
C Schueuermann, P Bremer, P Silcock
No abstract text is available yet for this article.
June 9, 2017: Journal of Mass Spectrometry: JMS
https://www.readbyqxmd.com/read/28587991/controlled-water-deficit-during-ripening-affects-proanthocyanidin-synthesis-concentration-and-composition-in-cabernet-sauvignon-grape-skins
#18
Alejandro Cáceres-Mella, M Inmaculada Talaverano, Luis Villalobos-González, Camila Ribalta-Pizarro, Claudio Pastenes
The influence of controlled water deficit on the phenolic composition and gene expression of VvLAR2, VvMYBPA1, VvMYBPA2 and VvMYB4a in Cabernet Sauvignon grape skins throughout ripening was investigated. The assay was carried out on own-rooted Vitis vinifera plants cv. Cabernet Sauvignon in a commercial vineyard from veraison until commercial harvest. Three irrigation regimes were used from veraison until harvest with the following treatments: T1: 3.6 mm day(-1); T2: 1.8 mm day(-1) and T3: 0.3 mm day(-1)...
May 26, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28587278/tryptophan-levels-during-grape-ripening-effects-of-cultural-practices
#19
Ana Ruiz-Rodríguez, Ceferino A Carrera, Widiastuti Setyaningsih, Gerardo F Barbero, Marta Ferreiro-González, Miguel Palma, Carmelo G Barroso
Some cultural practices that are carried out during the grape ripening period are associated with vine stress, including leaf removal, grape bunch removal, and vegetable cover crops. Additionally, several nitrogen and sulfur supplements have also been used directly on leaves during the last stage of the ripening period. In the work described here, five different cultural practices and the reference were applied in three replicates in the same vineyard. The evolution of tryptophan levels was evaluated from just after grape veraison until the harvest date...
June 6, 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
#20
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
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