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https://www.readbyqxmd.com/read/28812199/complete-genome-sequence-of-a-putative-new-caulimovirus-which-exists-as-endogenous-pararetroviral-sequences-in-angelica-dahurica
#1
Seungmo Lim, Dasom Baek, Davaajargal Igori, Jae Sun Moon
A virus isolate designated Angelica bushy stunt virus (AnBSV), provisionally representing a new species in the genus Caulimovirus, was discovered in the medicinal plant Angelica dahurica. The complete 8,300-nt genomic DNA of AnBSV had seven putative open reading frames containing conserved domains/motifs, which are typical features of caulimoviruses, and showed the greatest nucleotide sequence identity (74% identity and 27% query coverage) to a lamium leaf distortion virus isolate. Interestingly, the new caulimovirus exists as endogenous pararetroviral sequences in the host plant and is considered to have multiple defective plant genome-integrated copies that may lead to the generation of subgenomic DNA species...
August 10, 2017: Archives of Virology
https://www.readbyqxmd.com/read/28811760/the-use-of-a-tobacco-mosaic-virus-based-expression-vector-system-in-chrysanthemum
#2
Minju Park, Eseul Baek, Ju-Yeon Yoon, Peter Palukaitis
Chrysanthemums (Chrysanthemum morifolium) are susceptible to tobacco mosaic virus (TMV). TMV-based expression vectors have been used in high-throughput experiments for production of foreign protein in plants and also expressing green fluorescent protein (GFP) to allow visualization of TMV movement. Here, we used TMV expressing the GFP to examine the infection of chrysanthemum by a TMV-based expression vector. Viral replication, movement and GFP expression by TMV-GFP were verified in upper leaves of chrysanthemums up to 73 days post inoculation (dpi) by RT-PCR...
August 2017: Plant Pathology Journal
https://www.readbyqxmd.com/read/28811759/seed-transmission-of-tomato-yellow-leaf-curl-virus-in-white-soybean-glycine-max
#3
Eui-Joon Kil, Jungho Park, Hong-Soo Choi, Chang-Seok Kim, Sukchan Lee
Tomato yellow leaf curl virus (TYLCV) infection of the common bean (Phaseolus vulgaris) has been reported, but soybean (Glycine max) has not previously been identified as a TYLCV host. Five cultivars of white soybean were agro-inoculated using an infectious TYLCV clone. At 30 days post-inoculation, they showed infection rates of 25% to 100%. Typical TYLCV symptoms were not observed in any inoculated plants. To examine whether TYLCV was transmitted in soybean seeds, DNA was isolated from bundles of five randomly selected seeds from TYLCV-inoculated soybean plants and amplified with a TYLCV-specific primer set...
August 2017: Plant Pathology Journal
https://www.readbyqxmd.com/read/28811756/pseudomonas-oleovorans-strain-kbpf-004-culture-supernatants-reduced-seed-transmission-of-cucumber-green-mottle-mosaic-virus-and-pepper-mild-mottle-virus-and-remodeled-aggregation-of-126-kda-and-subcellular-localization-of-movement-protein-of-pepper-mild-mottle
#4
Nam-Gyu Kim, Eun-Young Seo, Sang-Hyuk Han, Jun-Su Gong, Cheol-Nam Park, Ho-Seop Park, Leslie L Domier, John Hammond, Hyoun-Sub Lim
Efforts to control viral diseases in crop production include several types of physical or chemical treatments; antiviral extracts of a number of plants have also been examined to inhibit plant viral infection. However, treatments utilizing naturally selected microorganisms with activity against plant viruses are poorly documented. Here we report isolation of a soil inhabiting bacterium, Pseudomonas oleovorans strain KBPF-004 (developmental code KNF2016) which showed antiviral activity against mechanical transmission of tobamoviruses...
August 2017: Plant Pathology Journal
https://www.readbyqxmd.com/read/28811755/a-novel-recombined-potato-virus-y-isolate-in-china
#5
Shuxin Han, Yanling Gao, Guoquan Fan, Wei Zhang, Cailing Qiu, Shu Zhang, Yanju Bai, Junhua Zhang, Carl Spetz
This study reports the findings of a distinct Potato virus Y (PVY) isolate found in Northeast China. One hundred and ten samples (leaves and tubers) were collected from potato plants showing mosaic symptoms around the city of Harbin in Heilongjiang province of China. The collected tubers were planted and let to grow in a greenhouse. New potato plants generated from these tubers showed similar symptoms, except for one plant. Subsequent serological analyses revealed PVY as the causing agent of the disease. A novel PVY isolate (referred to as HLJ-C-44 in this study) was isolated from this sample showing unique mild mosaic and crisped leaf margin symptoms...
August 2017: Plant Pathology Journal
https://www.readbyqxmd.com/read/28811473/plant-made-polio-type-3-stabilized-vlps-a-candidate-synthetic-polio-vaccine
#6
Johanna Marsian, Helen Fox, Mohammad W Bahar, Abhay Kotecha, Elizabeth E Fry, David I Stuart, Andrew J Macadam, David J Rowlands, George P Lomonossoff
Poliovirus (PV) is the causative agent of poliomyelitis, a crippling human disease known since antiquity. PV occurs in two distinct antigenic forms, D and C, of which only the D form elicits a robust neutralizing response. Developing a synthetically produced stabilized virus-like particle (sVLP)-based vaccine with D antigenicity, without the drawbacks of current vaccines, will be a major step towards the final eradication of poliovirus. Such a sVLP would retain the native antigenic conformation and the repetitive structure of the original virus particle, but lack infectious genomic material...
August 15, 2017: Nature Communications
https://www.readbyqxmd.com/read/28810884/a-novel-method-for-transmitting-southern-rice-black-streaked-dwarf-virus-to-rice-without-insect-vector
#7
Lu Yu, Jing Shi, Lianlian Cao, Guoping Zhang, Wenli Wang, Deyu Hu, Baoan Song
BACKGROUND: Southern rice black-streaked dwarf virus (SRBSDV) has spread from the south of China to the north of Vietnam in the past few years, and has severely influenced rice production. However, previous study of traditional SRBSDV transmission method by the natural virus vector, the white-backed planthopper (WBPH, Sogatella furcifera), in the laboratory, researchers are frequently confronted with lack of enough viral samples due to the limited life span of infected vectors and rice plants and low virus acquisition and inoculation efficiency by the vector...
August 15, 2017: Virology Journal
https://www.readbyqxmd.com/read/28807852/extracts-of-equisetum-giganteum-l-and-copaifera-reticulate-ducke-show-strong-antiviral-activity-against-the-sexually-transmitted-pathogen-herpes-simplex-virus-type-2
#8
Marianela Patzi Churqui, Liza Lind, Karolina Thörn, Alexandra Svensson, Otto Savolainen, Katty Terrazas Aranda, Kristina Eriksson
ETHNOPHARMACOLOGICAL RELEVANCE: Equisetum giganteum L and Copaifera reticulate Ducke have been traditionally used by women of the Tacana tribe in the Bolivian Amazonas for genital hygiene and for treatment of genital infection/inflammation. AIM OF THE STUDY: To assess the ability of extracts from Equisetum giganteum L and Copaifera reticulate Ducke to block genital viral infection by herpes simplex virus type 2. MATERIALS AND METHODS: Equisetum giganteum L and Copaifera reticulate Ducke were collected from the Amazon region of La Paz, Bolivia...
August 11, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28807054/transcriptomic-profile-of-tobacco-in-response-to-tomato-zonate-spot-orthotospovirus-infection
#9
Changjun Huang, Yupeng Cun, Haiqin Yu, Zhijun Tong, Bingguang Xiao, Zhongbang Song, Bingwu Wang, Yongping Li, Yong Liu
BACKGROUND: Tomato zonate spot virus (TZSV), a dominant species of thrips-transmitted orthotospoviruses in Yunnan and Guangxi provinces in China, causes significant loss of yield in lots of crops and is a major threat to incomes of rural families. However, the detailed molecular mechanism of crop disease caused by TZSV remains obscure. METHODS: Next-generation sequencing (NGS)-based transcriptome analysis (RNA-seq) was performed to investigate and compare the gene expression changes in systemic leaves of tobacco upon infection with TZSV and mock-inoculated plants as a control...
August 14, 2017: Virology Journal
https://www.readbyqxmd.com/read/28806733/the-interaction-between-endogenous-30s-ribosomal-subunit-protein-s11-and-cucumber-mosaic-virus-ls2b-protein-affects-viral-replication-infection-and-gene-silencing-suppressor-activity
#10
Ruilin Wang, Zhiyou Du, Zhenqing Bai, Zongsuo Liang
Cucumber mosaic virus (CMV) is a model virus for plant-virus protein interaction and mechanism research because of its wide distribution, high-level of replication and simple genome structure. The 2b protein is a multifunctional protein encoded by CMV that suppresses RNA silencing-based antiviral defense and contributes to CMV virulence in host plants. In this report, 12 host proteins were identified as CMV LS2b binding partners using the yeast two-hybrid screen system from the Arabidopsis thaliana cDNA library...
2017: PloS One
https://www.readbyqxmd.com/read/28806695/use-of-peptide-aptamers-cationic-peptides-and-artificial-zinc-finger-proteins-to-generate-resistance-to-plant-viruses
#11
REVIEW
Takashi Sera
Various RNA/DNA viruses have caused severe infectious diseases in plants as well as animals, including humans, and been a threat to the production of agricultural crops. Therefore, prevention of plant virus infections is a major objective in crop protection. One attractive approach is to inhibit functions of viral proteins responsible for virus infections. In this review, I describe the status using such approaches to confer virus resistance to plants by three types of peptides/proteins: peptide aptamers, artificial zinc finger proteins and acidic peptides...
August 11, 2017: Current Opinion in Virology
https://www.readbyqxmd.com/read/28802707/boosting-innate-immunity-to-sustainably-control-diseases-in-crops
#12
REVIEW
Valerie Nicaise
Viruses cause epidemics in all major crops, threatening global food security. The development of efficient and durable resistance able to withstand viral attacks represents a major challenge for agronomy, and relies greatly on the understanding of the molecular dialogue between viral pathogens and their hosts. Research over the last decades provided substantial advances in the field of plant-virus interactions. Remarkably, the advent of studies of plant innate immunity has recently offered new strategies exploitable in the field...
August 10, 2017: Current Opinion in Virology
https://www.readbyqxmd.com/read/28802147/generation-of-novel-resistance-genes-using-mutation-and-targeted-gene-editing
#13
REVIEW
Amit Gal-On, Marc Fuchs, Stewart Gray
Classical breeding for virus resistance is a lengthy process and is restricted by the availability of resistance genes. Precise genome editing is a 'dream technology' to improve plants for virus resistance and these tools have opened new and very promising ways to generate virus resistant plants by disrupting host susceptibility genes, or by increasing the expression of viral resistance genes. However, precise targets must be identified and their roles understood to minimize potential negative effects on the plant...
August 9, 2017: Current Opinion in Virology
https://www.readbyqxmd.com/read/28800552/utilization-of-engineered-resistance-to-viruses-in-crops-of-the-developing-world-with-emphasis-on-sub-saharan-africa
#14
REVIEW
Jan F Kreuze, Jari Pt Valkonen
Viral diseases in crop plants constitute a major obstacle to food security in the developing world. Subsistence crops, including cassava, sweetpotato, potato, banana, papaya, common bean, rice and maize are often infected with RNA and/or DNA viruses that cannot be controlled with pesticides. Hence, healthy planting materials and virus-resistant cultivars are essential for high yields of good quality. However, resistance genes are not available for all viral diseases of crop plants. Therefore, virus resistance engineered in plants using modern biotechnology methods is an important addition to the crop production toolbox...
August 8, 2017: Current Opinion in Virology
https://www.readbyqxmd.com/read/28800551/using-transgenic-plants-and-modified-plant-viruses-for-the-development-of-treatments-for-human-diseases
#15
REVIEW
Hwei-San Loh, Brian J Green, Vidadi Yusibov
Production of proteins in plants for human health applications has become an attractive strategy attributed by their potentials for low-cost production, increased safety due to the lack of human or animal pathogens, scalability and ability to produce complex proteins. A major milestone for plant-based protein production for use in human health was achieved when Protalix BioTherapeutics produced taliglucerase alfa (Elelyso(®)) in suspension cultures of a transgenic carrot cell line for the treatment of patients with Gaucher's disease, was approved by the USA Food and Drug Administration in 2012...
August 8, 2017: Current Opinion in Virology
https://www.readbyqxmd.com/read/28798769/molecular-basis-underlying-leaf-variegation-of-a-moth-orchid-mutant-phalaenopsis-aphrodite-subsp-formosana
#16
Chi-Chu Tsai, Yu-Jen Wu, Chiou-Rong Sheue, Pei-Chun Liao, Ying-Hao Chen, Shu-Ju Li, Jian-Wei Liu, Han-Tsung Chang, Wen-Lin Liu, Ya-Zhu Ko, Yu-Chung Chiang
Leaf variegation is often the focus of plant breeding. Here, we studied a variegated mutant of Phalaenopsis aphrodite subsp. formosana, which is usually used as a parent of horticultural breeding, to understand its anatomic and genetic regulatory mechanisms in variegation. Chloroplasts with well-organized thylakoids and starch grains were found only in the mesophyll cells of green sectors but not of yellow sectors, confirming that the variegation belongs to the chlorophyll type. The two-dimensional electrophoresis and LC/MS/MS also reveal differential expressions of PsbP and PsbO between the green and yellow leaf sectors...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28798183/first-complete-genome-sequence-of-tobacco-necrosis-virus-d-isolated-from-soybean-and-from-north-america
#17
Gustavo A Díaz-Cruz, Charlotte M Smith, Kiana F Wiebe, Bryan J Cassone
We present the first complete genome sequence of the tombusvirus Tobacco necrosis virus D (TNV-D) from North America, obtained from an infected soybean plant. Compared with the three other TNV-D genomes isolated from different geographic regions and host plants, its nucleotide identities were between 83% and 93%.
August 10, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28796912/nanobody-mediated-resistance-to-grapevine-fanleaf-virus-in-plants
#18
Caroline Hemmer, Samia Djennane, Léa Ackerer, Kamal Hleibieh, Aurélie Marmonier, Sophie Gersch, Shahinez Garcia, Emmanuelle Vigne, Véronique Komar, Mireille Perrin, Claude Gertz, Lorène Belval, François Berthold, Baptiste Monsion, Corinne Schmitt-Keichinger, Olivier Lemaire, Bernard Lorber, Carlos Gutiérrez, Serge Muyldermans, Gérard Demangeat, Christophe Ritzenthaler
Since their discovery, single-domain antigen-binding fragments of camelid-derived heavy chain-only antibodies, also known as Nanobodies (Nbs), have proven to be of outstanding interest as therapeutics against human diseases and pathogens including viruses, but their use against phytopathogens remains limited. Many plant viruses including Grapevine fanleaf virus (GFLV), a nematode-transmitted icosahedral virus and causal agent of fanleaf degenerative disease, have worldwide distribution and huge burden on crop yields representing billions of US dollars of losses annually, yet solutions to combat these viruses are often limited or inefficient...
August 10, 2017: Plant Biotechnology Journal
https://www.readbyqxmd.com/read/28794924/expression-of-tomato-yellow-leaf-curl-virus-coat-protein-using-baculovirus-expression-system-and-evaluation-of-its-utility-as-a-viral-antigen
#19
Lamiaa Elgaied, Reda Salem, Wael Elmenofy
DNA encoding the coat protein (CP) of an Egyptian isolate of tomato yellow leaf curl virus (TYLCV) was inserted into the genome of Autographa californica nucleopolyhedrovirus (AcNPV) under the control of polyhedrin promoter. The generated recombinant baculovirus construct harboring the coat protein gene was characterized using PCR analysis. The recombinant coat protein expressed in infected insect cells was used as a coating antigen in an indirect Enzyme-linked immunosorbent assay (ELISA) and dot blot to test its utility for the detection of antibody generated against TYLCV virus particles...
August 2017: 3 Biotech
https://www.readbyqxmd.com/read/28794424/virus-like-particles-that-display-zika-virus-envelope-protein-domain-iii-induce-potent-neutralizing-immune-responses-in-mice
#20
Ming Yang, Huafang Lai, Haiyan Sun, Qiang Chen
Several Zika virus (ZIKV) vaccine candidates have recently been described which use inactivated whole virus, DNA or RNA that express the virus' Envelope (E) glycoprotein as the antigen. These were successful in stimulating production of virus-targeted antibodies that protected animals against ZIKV challenges, but their use potentially will predispose vaccinated individuals to infection by the related Dengue virus (DENV). We have devised a virus like particle (VLP) carrier based on the hepatitis B core antigen (HBcAg) that displays the ZIKV E protein domain III (zDIII), and shown that it can be produced quickly and easily purified in large quantities from Nicotiana benthamiana plants...
August 9, 2017: Scientific Reports
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