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https://www.readbyqxmd.com/read/27915036/a-rapid-assay-for-detection-of-rose-rosette-virus-using-reverse-transcription-recombinase-polymerase-amplification-using-multiple-gene-targets
#1
Binoy Babu, Brian K Washburn, Steven H Miller, Kristina Poduch, Tulin Sarigul, Gary W Knox, Francisco M Ochoa-Corona, Mathews L Paret
Rose rosette disease caused by Rose rosette virus (RRV; genus Emaravirus) is the most economically relevant disease of Knock Out(®) series roses in the U.S. As there are no effective chemical control options for the disease, the most critical disease management strategies include the use of virus free clean plants for propagation and early detection and destruction of infected plants. The current diagnostic techniques for RRV including end-point reverse transcription-polymerase chain reaction (RT-PCR) and real-time PCR (RT-qPCR) are highly sensitive, but limited to diagnostic labs with the equipment and expertise; and is time consuming...
November 30, 2016: Journal of Virological Methods
https://www.readbyqxmd.com/read/27911943/enhanced-in-planta-fitness-through-adaptive-mutations-in-efpr-a-dual-regulator-of-virulence-and-metabolic-functions-in-the-plant-pathogen-ralstonia-solanacearum
#2
Anthony Perrier, Rémi Peyraud, David Rengel, Xavier Barlet, Emmanuel Lucasson, Jérôme Gouzy, Nemo Peeters, Stéphane Genin, Alice Guidot
Experimental evolution of the plant pathogen Ralstonia solanacearum, where bacteria were maintained on plant lineages for more than 300 generations, revealed that several independent single mutations in the efpR gene from populations propagated on beans were associated with fitness gain on bean. In the present work, novel allelic efpR variants were isolated from populations propagated on other plant species, thus suggesting that mutations in efpR were not solely associated to a fitness gain on bean, but also on additional hosts...
December 2016: PLoS Pathogens
https://www.readbyqxmd.com/read/27911846/dna-methylome-of-the-20-gigabase-norway-spruce-genome
#3
Israel Ausin, Suhua Feng, Chaowei Yu, Wanlu Liu, Hsuan Yu Kuo, Elise L Jacobsen, Jixian Zhai, Javier Gallego-Bartolome, Lin Wang, Ulrika Egertsdotter, Nathaniel R Street, Steven E Jacobsen, Haifeng Wang
DNA methylation plays important roles in many biological processes, such as silencing of transposable elements, imprinting, and regulating gene expression. Many studies of DNA methylation have shown its essential roles in angiosperms (flowering plants). However, few studies have examined the roles and patterns of DNA methylation in gymnosperms. Here, we present genome-wide high coverage single-base resolution methylation maps of Norway spruce (Picea abies) from both needles and somatic embryogenesis culture cells via whole genome bisulfite sequencing...
November 28, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27902397/vesivirus-2117-capsids-more-closely-resemble-sapovirus-and-lagovirus-particles-than-other-known-vesivirus-structures
#4
Michaela Conley, Edward Emmott, Richard Orton, David Taylor, Daniel Carneiro, Kazuyoshi Murata, Ian Goodfellow, Grant Hansman, David Bhella
Vesivirus 2117 is an adventitious agent that in 2009, was identified as a contaminant of CHO cells propagated in bioreactors at a pharmaceutical manufacturing plant belonging to Genzyme. The consequent interruption in supply of Fabrazyme and Cerezyme (drugs used to treat Fabry and Gaucher disease respectively), caused significant economic losses. Vesivirus 2117 is a member of the Caliciviridae; a family of small icosahedral viruses encoding a positive sense RNA genome. We have used cryo-electron microscopy and three dimensional image reconstruction to calculate a structure of vesivirus 2117 virus like particles as well as feline calicivirus and a chimeric sapovirus...
November 14, 2016: Journal of General Virology
https://www.readbyqxmd.com/read/27898837/global-transcriptome-analysis-reveals-differences-in-gene-expression-patterns-between-nonhyperhydric-and-hyperhydric-peach-leaves
#5
Yakup Bakir, Vahap Eldem, Gokmen Zararsiz, Turgay Unver
Hyperhydricity is a morphophysiological disorder of plants in tissue culture characterized morphologically by the presence of translucent, thick, curled, and fragile leaves as a result of excessive water intake. Since clonal propagation is a major in vitro technique for multiplying plants vegetatively, the emergence of hyperhydricity-related symptoms causes significant economic losses to agriculture and horticulture. Although numerous efforts have been hitherto devoted to the morphological and anatomical responses of plants to hyperhydricity, the underlying molecular mechanism remains largely unknown...
July 2016: Plant Genome
https://www.readbyqxmd.com/read/27895657/implication-of-the-whitefly-bemisia-tabaci-cyclophilin-b-protein-in-the-transmission-of-tomato-yellow-leaf-curl-virus
#6
Surapathrudu Kanakala, Murad Ghanim
Tomato yellow leaf curl virus (TYLCV) is a single-stranded (ssDNA) begomoviruses that causes severe damage to tomato and several other crops worldwide. TYLCV is exclusively transmitted by the sweetpotato whitefly, Bemisia tabaci in a persistent circulative and propagative manner. Previous studies have shown that the transmission, retention, and circulation of TYLCV in its vector involves interaction with insect and endosymbiont proteins, which aid in the transmission of the virus, or have a protective role in response to the presence of the virus in the insect body...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27891561/citrus-psorosis-virus-coat-protein-derived-hairpin-construct-confers-stable-transgenic-resistance-in-citrus-against-psorosis-a-and-b-syndromes
#7
A De Francesco, N Costa, M L García
Citrus psorosis virus (CPsV) is the causal agent of psorosis, a serious and widespread citrus disease. Two syndromes of psorosis, PsA and PsB, have been described. PsB is the most aggressive and rampant form. Previously, we obtained Pineapple sweet orange plants transformed with a hairpin construct derived from the CPsV coat protein gene (ihpCP). Some of these plants were resistant to CPsV 90-1-1, a PsA isolate homologous to the transgene. In this study, we found that expression of the ihpCP transgene and siRNA production in lines ihpCP-10 and -15 were stable with time and propagation...
November 28, 2016: Transgenic Research
https://www.readbyqxmd.com/read/27880711/fine-tuning-motile-cilia-and-flagella-evolution-of-the-dynein-motor-proteins-from-plants-to-humans-at-high-resolution
#8
Martin Kollmar
The flagellum is a key innovation linked to eukaryogenesis. It provides motility by regulated cycles of bending and bend propagation, which are thought to be controlled by a complex arrangement of seven distinct dyneins in repeated patterns of outer- (OAD) and inner-arm dynein (IAD) complexes. Electron tomography showed high similarity of this axonemal repeat pattern across ciliates, algae, and animals, but the diversity of dynein sequences across the eukaryotes has not yet comprehensively been resolved and correlated with structural data...
December 2016: Molecular Biology and Evolution
https://www.readbyqxmd.com/read/27878915/plant-phytopathogen-interactions-bacterial-responses-to-environmental-and-plant-stimuli
#9
REVIEW
Simon Leonard, Florence Hommais, William Nasser, Sylvie Reverchon
Plant pathogenic bacteria attack numerous agricultural crops, causing devastating effects on plant productivity and yield. They survive in diverse environments, both in plants, as pathogens, and also outside their hosts as saprophytes. Hence, they are confronted with numerous changing environmental parameters. During infection, plant pathogens have to deal with stressful conditions, such as acidic, oxidative and osmotic stresses; anaerobiosis; plant defenses; and contact with antimicrobial compounds. These adverse conditions can reduce bacterial survival and compromise disease initiation and propagation...
November 23, 2016: Environmental Microbiology
https://www.readbyqxmd.com/read/27864513/construction-of-a-male-sterility-system-for-hybrid-rice-breeding-and-seed-production-using-a-nuclear-male-sterility-gene
#10
Zhenyi Chang, Zhufeng Chen, Na Wang, Gang Xie, Jiawei Lu, Wei Yan, Junli Zhou, Xiaoyan Tang, Xing Wang Deng
The breeding and large-scale adoption of hybrid seeds is an important achievement in agriculture. Rice hybrid seed production uses cytoplasmic male sterile lines or photoperiod/thermo-sensitive genic male sterile lines (PTGMS) as female parent. Cytoplasmic male sterile lines are propagated via cross-pollination by corresponding maintainer lines, whereas PTGMS lines are propagated via self-pollination under environmental conditions restoring male fertility. Despite huge successes, both systems have their intrinsic drawbacks...
November 18, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27862134/application-of-graph-theory-to-cost-effective-fire-protection-of-chemical-plants-during-domino-effects
#11
Nima Khakzad, Gabriele Landucci, Genserik Reniers
In the present study, we have introduced a methodology based on graph theory and multicriteria decision analysis for cost-effective fire protection of chemical plants subject to fire-induced domino effects. By modeling domino effects in chemical plants as a directed graph, the graph centrality measures such as out-closeness and betweenness scores can be used to identify the installations playing a key role in initiating and propagating potential domino effects. It is demonstrated that active fire protection of installations with the highest out-closeness score and passive fire protection of installations with the highest betweenness score are the most effective strategies for reducing the vulnerability of chemical plants to fire-induced domino effects...
November 10, 2016: Risk Analysis: An Official Publication of the Society for Risk Analysis
https://www.readbyqxmd.com/read/27849548/an-end-to-end-model-of-plant-pheromone-channel-for-long-range-molecular-communications
#12
Bige Deniz Unluturk, Ian Akyildiz
A new track in molecular communication is using pheromones which can scale up the range of diffusion-based communication from meters to meters and enable new applications requiring long range. Pheromone communication is the emission of molecules in the air which trigger behavioral or physiological responses in receiving organisms. The objective of this paper is to introduce a new end-to-end model which incorporates pheromone behavior with communication theory for plants. The proposed model includes both the transmission and reception processes as well as the propagation channel...
November 11, 2016: IEEE Transactions on Nanobioscience
https://www.readbyqxmd.com/read/27842875/molecular-evidence-of-the-close-relatedness-of-clinical-gull-and-wastewater-isolates-of-quinolone-resistant-escherichia-coli
#13
Ana Rita Varela, Vera Manageiro, Eugénia Ferreira, M Augusta Guimarães, Paulo Martins da Costa, Manuela Caniça, Célia M Manaia
Escherichia coli with reduced susceptibility to quinolones isolated from different environmental sources (urban wastewater treatment plants, n=61; hospital effluent, n=10; urban streams, n=9; gulls, n=18; birds of prey, n=17) and from hospitalised patients (n=28) were compared based on multilocus sequence typing (MLST) and pulsed-field gel electrophoresis (PFGE). The habitats with the most diversified genotypes of quinolone-resistant E. coli, corresponding to the highest genetic diversity (H'), were wastewater and gulls...
December 2015: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/27835811/thrips-developmental-stage-specific-transcriptome-response-to-tomato-spotted-wilt-virus-during-the-virus-infection-cycle-in-frankliniella-occidentalis-the-primary-vector
#14
Derek J Schneweis, Anna E Whitfield, Dorith Rotenberg
Tomato spotted wilt virus (TSWV) is transmitted by Frankliniella occidentalis in a circulative-propagative manner. Little is known about thrips vector response to TSWV during the infection process from larval acquisition to adult inoculation of plants. Whole-body transcriptome response to virus infection was determined for first-instar larval, pre-pupal and adult thrips using RNA-Seq. TSWV responsive genes were identified using preliminary sequence of a draft genome of F. occidentalis as a reference and three developmental-stage transcriptomes were assembled...
November 8, 2016: Virology
https://www.readbyqxmd.com/read/27833593/recessive-resistance-to-plant-viruses-potential-resistance-genes-beyond-translation-initiation-factors
#15
REVIEW
Masayoshi Hashimoto, Yutaro Neriya, Yasuyuki Yamaji, Shigetou Namba
The ability of plant viruses to propagate their genomes in host cells depends on many host factors. In the absence of an agrochemical that specifically targets plant viral infection cycles, one of the most effective methods for controlling viral diseases in plants is taking advantage of the host plant's resistance machinery. Recessive resistance is conferred by a recessive gene mutation that encodes a host factor critical for viral infection. It is a branch of the resistance machinery and, as an inherited characteristic, is very durable...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27831474/ethylene-and-auxin-interaction-in-the-control-of-adventitious-rooting-in-arabidopsis-thaliana
#16
A Veloccia, L Fattorini, F Della Rovere, A Sofo, S D'Angeli, C Betti, G Falasca, M M Altamura
Adventitious roots (ARs) are post-embryonic roots essential for plant survival and propagation. Indole-3-acetic acid (IAA) is the auxin that controls AR formation; however, its precursor indole-3-butyric acid (IBA) is known to enhance it. Ethylene affects many auxin-dependent processes by affecting IAA synthesis, transport and/or signaling, but its role in AR formation has not been elucidated. This research investigated the role of ethylene in AR formation in dark-grown Arabidopsis thaliana seedlings, and its interaction with IAA/IBA...
November 9, 2016: Journal of Experimental Botany
https://www.readbyqxmd.com/read/27822216/proteomic-dissection-of-seed-germination-and-seedling-establishment-in-brassica-napus
#17
Jianwei Gu, Hongbo Chao, Lu Gan, Liangxing Guo, Kai Zhang, Yonghong Li, Hao Wang, Nadia Raboanatahiry, Maoteng Li
The success of seed germination and establishment of a normal seedling are key determinants of plant species propagation. At present, only a few studies have focused on the genetic control of seed germination by using a proteomic approach in Brassica napus. In the present study, the protein expression pattern of seed germination was investigated using differential fluorescence two-dimensional gel electrophoresis in B. napus. One hundred and thirteen differentially expressed proteins (DEPs) that were mainly involved in storage (23...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27815909/detection-of-changes-in-the-medicago-sativa-retinoblastoma-related-protein-msrbr1-phosphorylation-during-cell-cycle-progression-in-synchronized-cell-suspension-culture
#18
Ferhan Ayaydin, Edit Kotogány, Edit Ábrahám, Gábor V Horváth
Deepening our knowledge on the regulation of the plant cell division cycle depends on techniques that allow for the enrichment of cell populations in defined cell cycle phases. Synchronization of cell division can be achieved using different plant tissues; however, well-established cell suspension cultures provide large amount of biological sample for further analyses. Here, we describe the methodology of the establishment, propagation, and analysis of a Medicago sativa suspension culture that can be used for efficient synchronization of the cell division...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27812549/production-of-virus-free-orchid-cymbidium-aloifolium-l-sw-by-various-tissue-culture-techniques
#19
Shreeti Pradhan, Tripti Regmi, Mukunda Ranjit, Bijaya Pant
Orchids are affected by many viruses resulting in poor growth, yield and quality, and an overall decline in population. Cymbidium mosaic virus (CymMV) is one of the common orchid viruses found in Cymbidium species but it infects different orchid genera. In this study Cymbidium aloifolium was propagated in vitro using MS medium at different strength (1.0, ½, and ¼) with or without 0.5 mg/l BAP (6-benzylaminopurine) and 0.5 mg/l NAA (Naphthalene acetic acid). To provide disease-free planting material, source plant for in vitro propagation needs to be screened for pathogenic viruses...
October 2016: Heliyon
https://www.readbyqxmd.com/read/27808389/dissimilarity-between-mouriri-elliptica-mart-plants-cultivated-in-vitro-and-in-situ-through-anatomic-parameters
#20
E S Assis, A Rubio Neto, P D S Cabral, F G Silva, L R Lima, S C Vasconcelos Filho
Mouriri elliptica (Mart.) is a genetic resource of the Cerrado domain, which has potential for food and medicinal use. A few studies have been performed on its in vitro propagation, and no studies have examined dissimilarities between plants of this species when cultivated in situ or in vitro. Therefore, the objective of the present study was to identify in vitro cultivation conditions that permit the formation of plantlets with leaf anatomical features that are less dissimilar to those of plants grown in situ...
October 6, 2016: Genetics and Molecular Research: GMR
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