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Discovery of a Closterovirus Infecting Jujube Plants Grown at Aksu Area in Xinjiang of China. Viruses 2023; 15:v15020267. [PMID: 36851483 PMCID: PMC9958854 DOI: 10.3390/v15020267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 01/05/2023] [Accepted: 01/15/2023] [Indexed: 01/19/2023] Open
Abstract
Chinese jujube (Ziziphus jujuba Mill.) is a widely grown fruit crop at Aksu in Xinjiang Uygur Autonomous Region of China. Viral disease-like symptoms are common on jujube plants. Here, for the first time, we report a virus tentatively named persimmon ampelovirus jujube isolate (PAmpV-Ju) infecting jujube plants. The virus was identified using high-throughput sequencing from a jujube plant (ID: AKS15) and molecularly related to viruses in the family Closteroviridae. The genomic sequences of two PAmpV-Ju variants named AKS15-20 and AKS15-17 were determined by RT-PCR amplifications. The genome structure of PAmpV-Ju was identical to that of a recently reported persimmon ampelovirus (PAmpV) and consisted of seven open reading frames. The genomes of AKS15-20 and AKS15-17 shared 83.7% nt identity with each other, and the highest nt sequence identity of 79% with two variants of PAmpV. The incidence of PAmpV-Ju on Aksu jujube plants was evaluated by RT-PCR assays. The phylogenetic analysis of amplified partial sequences coding for polymerase, HSP70h, and CP revealed two phylogenetic clades represented by AKS15-20 and AKS15-17. Our study provides important evidence for understanding viruses infecting jujube plants and establishing efficient measures to prevent virus spread.
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Wen S, Wang G, Yang Z, Wang Y, Rao M, Lu Q, Hong N. Next-Generation Sequencing Combined With Conventional Sanger Sequencing Reveals High Molecular Diversity in Actinidia Virus 1 Populations From Kiwifruit Grown in China. Front Microbiol 2020; 11:602039. [PMID: 33391218 PMCID: PMC7774462 DOI: 10.3389/fmicb.2020.602039] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Accepted: 11/11/2020] [Indexed: 01/04/2023] Open
Abstract
Kiwifruit (Actinidia spp.) is native to China. Viral disease–like symptoms are common on kiwifruit plants. In this study, six libraries prepared from total RNA of leaf samples from 69 kiwifruit plants were subjected to next-generation sequencing (NGS). Actinidia virus 1 (AcV-1), a tentative species in the family Closteroviridae, was discovered in the six libraries. Two full-length and two near-full genome sequences of AcV-1 variants were determined by Sanger sequencing. The genome structure of these Chinese AcV-1 variants was identical to that of isolate K75 and consisted of 12 open reading frames (ORFs). Analyses of these sequences together with the NGS-derived contig sequences revealed high molecular diversity in AcV-1 populations, with the highest sequence variation occurring at ORF1a, ORF2, and ORF3, and the available variants clustered into three phylogenetic clades. For the first time, our study revealed different domain compositions in the viral ORF1a and molecular recombination events among AcV-1 variants. Specific reverse transcriptase–polymerase chain reaction assays disclosed the presence of AcV-1 in plants of four kiwifruit species and unknown Actinidia spp. in seven provinces and one city.
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Affiliation(s)
- Shaohua Wen
- Key Lab of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China.,Key Laboratory of Horticultural Crop (Fruit Trees) Biology and Germplasm Creation of the Ministry of Agriculture, Wuhan, China
| | - Guoping Wang
- Key Lab of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Zuokun Yang
- Key Lab of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Yanxiang Wang
- Key Lab of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Min Rao
- Key Lab of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Qian Lu
- Key Lab of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Ni Hong
- Key Lab of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China.,Key Laboratory of Horticultural Crop (Fruit Trees) Biology and Germplasm Creation of the Ministry of Agriculture, Wuhan, China
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Adiputra J, Jarugula S, Naidu RA. Intra-species recombination among strains of the ampelovirus Grapevine leafroll-associated virus 4. Virol J 2019; 16:139. [PMID: 31744534 PMCID: PMC6862812 DOI: 10.1186/s12985-019-1243-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Accepted: 10/15/2019] [Indexed: 01/22/2023] Open
Abstract
BACKGROUND Grapevine leafroll disease is one of the most economically important viral diseases affecting grape production worldwide. Grapevine leafroll-associated virus 4 (GLRaV-4, genus Ampelovirus, family Closteroviridae) is one of the six GLRaV species documented in grapevines (Vitis spp.). GLRaV-4 is made up of several distinct strains that were previously considered as putative species. Currently known strains of GLRaV-4 stand apart from other GLRaV species in lacking the minor coat protein. METHODS In this study, the complete genome sequence of three strains of GLRaV-4 from Washington State vineyards was determined using a combination of high-throughput sequencing, Sanger sequencing and RACE. The genome sequence of these three strains was compared with corresponding sequences of GLRaV-4 strains reported from other grapevine-growing regions. Phylogenetic analysis and SimPlot and Recombination Detection Program (RDP) were used to identify putative recombination events among GLRaV-4 strains. RESULTS The genome size of GLRaV-4 strain 4 (isolate WAMR-4), strain 5 (isolate WASB-5) and strain 9 (isolate WALA-9) from Washington State vineyards was determined to be 13,824 nucleotides (nt), 13,820 nt, and 13,850 nt, respectively. Multiple sequence alignments showed that a 11-nt sequence (5'-GTAATCTTTTG-3') towards 5' terminus of the 5' non-translated region (NTR) and a 10-nt sequence (5'-ATCCAGGACC-3') towards 3' end of the 3' NTR are conserved among the currently known GLRaV-4 strains. LR-106 isolate of strain 4 and Estellat isolate of strain 6 were identified as recombinants due to putative recombination events involving divergent sequences in the ORF1a from strain 5 and strain Pr. CONCLUSION Genome-wide analyses showed for the first time that recombinantion can occur between distinct strains of GLRaV-4 resulting in the emergence of genetically stable and biologically successful chimeric viruses. Although the origin of recombinant strains of GLRaV-4 remains elusive, intra-species recombination could be playing an important role in shaping genetic diversity and evolution of the virus and modulating the biology and epidemiology of GLRaV-4 strains.
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Affiliation(s)
- Jati Adiputra
- Department of Plant Pathology, Irrigated Agriculture Research and Extension center, Washington State University, Prosser, Washington, 99350, USA.,Present address, Center for Diagnostic Standards of Agricultural Quarantine, Ministry of Agriculture, Indonesia Agricultural Quarantine Agency, Jakarta, Indonesia
| | - Sridhar Jarugula
- Department of Plant Pathology, Irrigated Agriculture Research and Extension center, Washington State University, Prosser, Washington, 99350, USA
| | - Rayapati A Naidu
- Department of Plant Pathology, Irrigated Agriculture Research and Extension center, Washington State University, Prosser, Washington, 99350, USA.
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4
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Reynard JS, Schneeberger PHH, Frey JE, Schaerer S. Biological, Serological, and Molecular Characterization of a Highly Divergent Strain of Grapevine leafroll-associated virus 4 Causing Grapevine Leafroll Disease. PHYTOPATHOLOGY 2015; 105:1262-1269. [PMID: 25822183 DOI: 10.1094/phyto-12-14-0386-r] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The complete genome sequence of a highly divergent strain of Grapevine leafroll-associated virus 4 (GLRaV-4) was determined using 454 pyrosequencing technology. This virus, designated GLRaV-4 Ob, was detected in Vitis vinifera 'Otcha bala' from our grapevine virus collection at Agroscope. The GLRaV-4 Ob genome length and organization share similarities with members of subgroup II in the genus Ampelovirus (family Closteroviridae). Otcha bala was graft-inoculated onto indicator plants of cultivar Gamay to evaluate the biological properties of this new strain, and typical leafroll symptoms were induced. A monoclonal antibody for the rapid detection of GLRaV-4 Ob by enzyme-linked immunosorbent assay is available, thus facilitating large-scale diagnostics of this virus. Based on the relatively small size of the coat protein, the reduced amino acid identity and the distinct serological properties, our study clearly shows that GLRaV-4 Ob is a divergent strain of GLRaV-4. Furthermore, molecular and serological data revealed that the AA42 accession from which GLRaV-7 was originally reported is in fact co-infected with GLRaV-4 Ob and GLRaV-7. This finding challenges the idea that GLRaV-7 is a leafroll-causing agent.
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Affiliation(s)
- Jean-Sébastien Reynard
- First and fourth authors: Agroscope-Virology and Phytoplasmology, Nyon, Switzerland; second author: Swiss Tropical and Public Health Institute-Virology, Basel, Switzerland; and third author: Agroscope-Molecular Diagnostics, Genomics and Bioinformatics, Waedenswil, Switzerland
| | - Pierre H H Schneeberger
- First and fourth authors: Agroscope-Virology and Phytoplasmology, Nyon, Switzerland; second author: Swiss Tropical and Public Health Institute-Virology, Basel, Switzerland; and third author: Agroscope-Molecular Diagnostics, Genomics and Bioinformatics, Waedenswil, Switzerland
| | - Jürg Ernst Frey
- First and fourth authors: Agroscope-Virology and Phytoplasmology, Nyon, Switzerland; second author: Swiss Tropical and Public Health Institute-Virology, Basel, Switzerland; and third author: Agroscope-Molecular Diagnostics, Genomics and Bioinformatics, Waedenswil, Switzerland
| | - Santiago Schaerer
- First and fourth authors: Agroscope-Virology and Phytoplasmology, Nyon, Switzerland; second author: Swiss Tropical and Public Health Institute-Virology, Basel, Switzerland; and third author: Agroscope-Molecular Diagnostics, Genomics and Bioinformatics, Waedenswil, Switzerland
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Abstract
Grapevine is a high value vegetatively propagated fruit crop that suffers from numerous viruses, including some that seriously affect the profitability of vineyards. Nowadays, 64 viruses belonging to different genera and families have been reported in grapevines and new virus species will likely be described in the future. Three viral diseases namely leafroll, rugose wood, and infectious degeneration are of major economic importance worldwide. The viruses associated with these diseases are transmitted by mealybugs, scale and soft scale insects, or dagger nematodes. Here, we review control measures of the major grapevine viral diseases. More specifically, emphasis is laid on (i) approaches for the production of clean stocks and propagative material through effective sanitation, robust diagnosis, as well as local and regional certification efforts, (ii) the management of vectors of viruses using cultural, biological, and chemical methods, and (iii) the production of resistant grapevines mainly through the application of genetic engineering. The benefits and limitations of the different control measures are discussed with regard to accomplishments and future research directions.
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Affiliation(s)
- Varvara I Maliogka
- Faculty of agriculture, Forestry and Natural Environment, School of Agriculture, Plant Pathology Lab, Aristotle University of Thessaloniki, Thessaloniki, Greece.
| | | | - Marc Fuchs
- Department of Plant Pathology and Plant-Microbe Biology, Cornell University, New York State Agricultural Experiment Station, Geneva, New York, USA
| | - Nikolaos I Katis
- Faculty of agriculture, Forestry and Natural Environment, School of Agriculture, Plant Pathology Lab, Aristotle University of Thessaloniki, Thessaloniki, Greece
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An evolutionary analysis of the Secoviridae family of viruses. PLoS One 2014; 9:e106305. [PMID: 25180860 PMCID: PMC4152289 DOI: 10.1371/journal.pone.0106305] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Accepted: 08/04/2014] [Indexed: 01/03/2023] Open
Abstract
The plant-infecting Secoviridae family of viruses forms part of the Picornavirales order, an important group of non-enveloped viruses that infect vertebrates, arthropods, plants and algae. The impact of the secovirids on cultivated crops is significant, infecting a wide range of plants from grapevine to rice. The overwhelming majority are transmitted by ecdysozoan vectors such as nematodes, beetles and aphids. In this study, we have applied a variety of computational methods to examine the evolutionary traits of these viruses. Strong purifying selection pressures were calculated for the coat protein (CP) sequences of nine species, although for two species evidence of both codon specific and episodic diversifying selection were found. By using Bayesian phylogenetic reconstruction methods CP nucleotide substitution rates for four species were estimated to range from between 9.29×10−3 to 2.74×10−3 (subs/site/year), values which are comparable with the short-term estimates of other related plant- and animal-infecting virus species. From these data, we were able to construct a time-measured phylogeny of the subfamily Comovirinae that estimated divergence of ninety-four extant sequences occurred less than 1,000 years ago with present virus species diversifying between 50 and 250 years ago; a period coinciding with the intensification of agricultural practices in industrial societies. Although recombination (modularity) was limited to closely related taxa, significant and often unique similarities in the protein domains between secovirid and animal infecting picorna-like viruses, especially for the protease and coat protein, suggested a shared ancestry. We discuss our results in a wider context and find tentative evidence to indicate that some members of the Secoviridae might have their origins in insects, possibly colonizing plants in a number of founding events that have led to speciation. Such a scenario; virus infection between species of different taxonomic kingdoms, has significant implications for virus emergence.
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Velasco L, Bota J, Montero R, Cretazzo E. Differences of Three Ampeloviruses' Multiplication in Plant May Explain Their Incidences in Vineyards. PLANT DISEASE 2014; 98:395-400. [PMID: 30708447 DOI: 10.1094/pdis-04-13-0433-re] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Grapevine leafroll ampeloviruses have been recently grouped into two major clades, one for Grapevine leafroll associated virus (GLRaV) 1 and 3 and another one grouping GLRaV-4 and its variants. In order to understand biological factors mediating differential ampelovirus incidences in vineyards, quantitative real-time polymerase chain reactions were performed to assess virus populations in three grapevine varieties in which different infection status were detected: GLRaV-3 + GLRaV-4, GLRaV-3 + GLRaV-4 strain 5, and GLRaV-4 alone. Specific primers based on the RNA-dependent RNA polymerase (RdRp) domains of GLRaV-3, GLRaV-4, and GLRaV-4 strain 5 were used. Absolute and relative quantitations of the three viruses were achieved by normalization of data to the concentration of the endogenous gene actin. In spring, the populations of GLRaV-4 and GLRaV-4 strain 5 were 1.7 × 104 to 5.0 × 105 genomic RNA copies/mg of petiole tissue whereas, for GLRaV-3, values were significantly higher, ranging from 5.6 × 105 and 1.0 × 107 copies mg-1. In autumn, GLRaV-4 and GLRaV-4 strain 5 populations increased significantly, displaying values for genome copies between 4.1 × 105 and 6.3 × 106 copies mg-1, whereas GLRaV-3 populations displayed a less pronounced boost but were still significantly higher, ranging from 4.1 × 106 to 1.6 × 107 copies mg-1. To investigate whether additional viruses may interfere in the quantifications the small RNA populations, vines were analyzed by Ion Torrent high-throughput sequencing. It allowed the identification of additional viruses and viroids, including Grapevine virus A, Hop stunt viroid, Grapevine yellow speckle viroid 1, and Australian grapevine viroid. The significance of these findings is discussed.
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Affiliation(s)
- Leonardo Velasco
- Instituto Andaluz de Investigación y Formación Agraria, Pesquera, Alimentaria y de la Producción Ecológica (IFAPA), 29140 Churriana, Málaga, Spain
| | - Josefina Bota
- Institut de Recerca i Formació Agrària i Pesquera de les Illes Balears, 07009 Palma de Mallorca, Spain
| | - Rafael Montero
- Institut de Recerca i Formació Agrària i Pesquera de les Illes Balears, 07009 Palma de Mallorca, Spain
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Rubio L, Guerri J, Moreno P. Genetic variability and evolutionary dynamics of viruses of the family Closteroviridae. Front Microbiol 2013; 4:151. [PMID: 23805130 PMCID: PMC3693128 DOI: 10.3389/fmicb.2013.00151] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2013] [Accepted: 05/29/2013] [Indexed: 11/15/2022] Open
Abstract
RNA viruses have a great potential for genetic variation, rapid evolution and adaptation. Characterization of the genetic variation of viral populations provides relevant information on the processes involved in virus evolution and epidemiology and it is crucial for designing reliable diagnostic tools and developing efficient and durable disease control strategies. Here we performed an updated analysis of sequences available in Genbank and reviewed present knowledge on the genetic variability and evolutionary processes of viruses of the family Closteroviridae. Several factors have shaped the genetic structure and diversity of closteroviruses. (I) A strong negative selection seems to be responsible for the high genetic stability in space and time for some viruses. (2) Long distance migration, probably by human transport of infected propagative plant material, have caused that genetically similar virus isolates are found in distant geographical regions. (3) Recombination between divergent sequence variants have generated new genotypes and plays an important role for the evolution of some viruses of the family Closteroviridae. (4) Interaction between virus strains or between different viruses in mixed infections may alter accumulation of certain strains. (5) Host change or virus transmission by insect vectors induced changes in the viral population structure due to positive selection of sequence variants with higher fitness for host-virus or vector-virus interaction (adaptation) or by genetic drift due to random selection of sequence variants during the population bottleneck associated to the transmission process.
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Affiliation(s)
- Luis Rubio
- Instituto Valenciano de Investigaciones AgrariasMoncada, Valencia, Spain
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9
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Almeida RPP, Daane KM, Bell VA, Blaisdell GK, Cooper ML, Herrbach E, Pietersen G. Ecology and management of grapevine leafroll disease. Front Microbiol 2013; 4:94. [PMID: 23630520 PMCID: PMC3633934 DOI: 10.3389/fmicb.2013.00094] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2013] [Accepted: 04/03/2013] [Indexed: 02/01/2023] Open
Abstract
Grapevine leafroll disease (GLD) is caused by a complex of vector-borne virus species in the family Closteroviridae. GLD is present in all grape-growing regions of the world, primarily affecting wine grape varieties. The disease has emerged in the last two decades as one of the major factors affecting grape fruit quality, leading to research efforts aimed at reducing its economic impact. Most research has focused on the pathogens themselves, such as improved detection protocols, with limited work directed toward disease ecology and the development of management practices. Here we discuss the ecology and management of GLD, focusing primarily on Grapevine leafroll-associated virus 3, the most important virus species within the complex. We contextualize research done on this system within an ecological framework that forms the backbone of the discussion regarding current and potential GLD management strategies. To reach this goal, we introduce various aspects of GLD biology and ecology, followed by disease management case studies from four different countries and continents (South Africa, New Zealand, California-USA, and France). We review ongoing regional efforts that serve as models for improved strategies to control this economically important and worldwide disease, highlighting scientific gaps that must be filled for the development of knowledge-based sustainable GLD management practices.
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Affiliation(s)
- Rodrigo P. P. Almeida
- Department of Environmental Science, Policy and Management, University of California at BerkeleyBerkeley, CA, USA
| | - Kent M. Daane
- Department of Environmental Science, Policy and Management, University of California at BerkeleyBerkeley, CA, USA
| | - Vaughn A. Bell
- The New Zealand Institute for Plant and Food Research LimitedHavelock North, New Zealand
| | - G. Kai Blaisdell
- Department of Environmental Science, Policy and Management, University of California at BerkeleyBerkeley, CA, USA
| | - Monica L. Cooper
- Division of Agriculture and Natural Resources, University of California at NapaNapa, CA, USA
| | - Etienne Herrbach
- UMR1131 Santé de la Vigne et Qualité du Vin, Institut National de la Recherche AgronomiqueColmar, France
- UMR1131, Université de StrasbourgStrasbourg, France
| | - Gerhard Pietersen
- Agricultural Research Council-Plant Protection Research Institute, c/o Department of Microbiology and Plant Pathology, University of Pretoria, Pretoria, South Africa
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Seah Y, Sharma AM, Zhang S, Almeida RP, Duffy S. A divergent variant of Grapevine leafroll-associated virus 3 is present in California. Virol J 2012; 9:235. [PMID: 23062082 PMCID: PMC3568029 DOI: 10.1186/1743-422x-9-235] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2012] [Accepted: 09/27/2012] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Grapevine leafroll-associated viruses are a problem for grape production globally. Symptoms are caused by a number of distinct viral species. During a survey of Napa Valley vineyards (California, USA), we found evidence of a new variant of Grapevine leafroll-associated virus 3 (GLRaV-3). We isolated its genome from a symptomatic greenhouse-raised plant and fully sequenced it. FINDINGS In a maximum likelihood analysis of representative GLRaV-3 gene sequences, the isolate grouped most closely with a recently sequenced variant from South Africa and a partial sequence from New Zealand. These highly divergent GLRaV-3 variants have predicted proteins that are more than 10% divergent from other GLRaV-3 variants, and appear to be missing an open reading frame for the p6 protein. CONCLUSIONS This divergent GLRaV-3 phylogroup is already present in grape-growing regions worldwide and is capable of causing symptoms of leafroll disease without the p6 protein.
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Affiliation(s)
- Yeemey Seah
- Department of Ecology, Evolution and Natural Resources, School of Environmental and Biological Sciences, Rutgers the State University of New Jersey, 14 College Farm Rd, New Brunswick, NJ 08901, USA
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11
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Ito T, Nakaune R, Nakano M, Suzaki K. Novel variants of grapevine leafroll-associated virus 4 and 7 detected from a grapevine showing leafroll symptoms. Arch Virol 2012; 158:273-5. [PMID: 22926688 DOI: 10.1007/s00705-012-1444-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2012] [Accepted: 07/08/2012] [Indexed: 11/29/2022]
Affiliation(s)
- Takao Ito
- Grape and Persimmon Research Station, National Institute of Fruit Tree Science (NIFTS), National Agriculture and Food Research Organization (NARO), Akitsu, Hiroshima 739-2494, Japan.
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12
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Thompson JR, Fuchs M, Fischer KF, Perry KL. Macroarray detection of grapevine leafroll-associated viruses. J Virol Methods 2012; 183:161-9. [DOI: 10.1016/j.jviromet.2012.04.008] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2012] [Revised: 04/17/2012] [Accepted: 04/23/2012] [Indexed: 01/18/2023]
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Le Maguet J, Beuve M, Herrbach E, Lemaire O. Transmission of six ampeloviruses and two vitiviruses to grapevine by Phenacoccus aceris. PHYTOPATHOLOGY 2012; 102:717-723. [PMID: 22439861 DOI: 10.1094/phyto-10-11-0289] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Grapevine leafroll disease is caused by grapevine leafroll-associated viruses (GLRaVs). These viruses are common in vineyards worldwide and often associated with vitiviruses that are involved in the rugose wood complex of grapevine. Ten mealybug species are known as vectors of one or several of these grapevine viruses, including the apple mealybug Phenacoccus aceris which is widespread in Holarctic regions and able to transmit Grapevine leafroll-associated virus-1 and -3 (GLRaV-1 and -3). Our aim was to characterize the transmission features of leafroll viruses by Phenacoccus aceris in order to better understand the contribution of this mealybug to leafroll epidemics. Results showed that Phenacoccus aceris is able to transmit GLRaV-1, -3, -4, -5, -6, and -9 to grapevine but not GLRaV-7. This is the first report of GLRaV-6 transmission by a mealybug. Also, for the first time it was shown that Phenacoccus aceris could vector vitiviruses Grapevine virus A (GVA) and Grapevine virus B (GVB). First instar nymphs were the most efficient stage in transmitting GLRaV-1, -3, and GVA. This research sheds light on the transmission biology of grapevine viruses by Phenacoccus aceris and represents a step forward to leafroll disease management.
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Affiliation(s)
- J Le Maguet
- Interprofessionnel du Vin de Champagne, Epernay, France.
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Esteves F, Teixeira Santos M, Eiras-Dias JE, Fonseca F. Occurrence of grapevine leafroll-associated virus 5 in Portugal: genetic variability and population structure in field-grown grapevines. Arch Virol 2012; 157:1747-65. [DOI: 10.1007/s00705-012-1371-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2012] [Accepted: 05/06/2012] [Indexed: 11/28/2022]
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15
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Al Rwahnih M, Dolja VV, Daubert S, Koonin EV, Rowhani A. Genomic and biological analysis of Grapevine leafroll-associated virus 7 reveals a possible new genus within the family Closteroviridae. Virus Res 2012; 163:302-9. [PMID: 22056321 PMCID: PMC5898237 DOI: 10.1016/j.virusres.2011.10.018] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2011] [Revised: 10/14/2011] [Accepted: 10/18/2011] [Indexed: 10/15/2022]
Abstract
Deep sequencing analysis of an asymptomatic grapevine revealed a virome containing five RNA viruses and a viroid. Of these, Grapevine leafroll-associated virus 7 (GLRaV-7), an unassigned closterovirus, was by far the most prominently represented sequence in the analysis. Graft-inoculation of the infection to another grape variety confirmed the lack of the leafroll disease symptoms, even though GLRaV-7 could be detected in the inoculated indicator plants. A 16,496 nucleotide-long genomic sequence of this virus was determined from the deep sequencing data. Its genome architecture and the sequences encoding its nine predicted proteins were compared with those of other closteroviruses. The comparison revealed that two other viruses, Little cherry virus-1 and Cordyline virus-1 formed a well supported phylogenetic cluster with GLRaV-7.
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Affiliation(s)
- Maher Al Rwahnih
- Department of Plant Pathology, University of California, Davis, CA 95616, USA
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