Luteoviruses
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. Inheritance of resistance to cotton blue disease.
The objective of this work was to determine the inheritance of cotton blue disease resistance by cotton plants. Populations derived from the CD 401 and Delta Opal resistant varieties were evaluated, through a greenhouse test with artificial inoculation by viruliferous aphids. Cotton blue disease resistance is conditioned by one dominant gene, both in CD 401
Pesquisa Agropecuária Brasileira. Publicado em: 2011
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2. Soluble sugars and starch accumulation on cotton plant leaves affected by cotton leafroll dwarf virus.
The cotton blue disease, a main cotton pest in Brazil, is caused by a luteovirus, named Cotton leafroll dwarf virus (CLRDV) or Cotton vein mosaic virus (CVMV). Symptoms include shortening of internodes and stunting. Luteoviruses have been reported to cause carbohydrates accumulation in infected plants. The aim of this research was to verify if soluble sugars
Revista Brasileira de Oleaginosas e Fibrosas. Publicado em: 2011
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3. The N-terminal region of the luteovirus readthrough domain determines virus binding to Buchnera GroEL and is essential for virus persistence in the aphid.
Luteoviruses and the luteovirus-like pea enation mosaic virus (PEMV; genus Enamovirus) are transmitted by aphids in a circulative, nonreplicative manner. Acquired virus particles persist for several weeks in the aphid hemolymph, in which a GroEL homolog, produced by the primary endosymbiont of the aphid, is abundantly present. Six subgroup II luteoviruses an
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4. In planta transcription of a second subgenomic RNA increases the complexity of the subgroup 2 luteovirus genome.
The genetic information of potato leafroll virus (PLRV), a typical member of the subgroup 2 luteoviruses, is contained in a single-stranded (+) sense RNA of approximately 5.9 kb. A single subgenomic RNA (sgRNA1) of approximately 2.3 kb has been characterized as the mRNA for the 3' clustered viral open reading frames ORF3, ORF3/5 and ORF4. Here we demonstrate
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5. Evolutionary relationship between luteoviruses and other RNA plant viruses based on sequence motifs in their putative RNA polymerases and nucleic acid helicases.
Comparative studies of sequence motifs in the RNA polymerases and nucleic acid helicases of positive-sense RNA plant viruses have provided a new scheme for the classification of these pathogens. We propose a new luteovirus supergroup which should be added to the already described Sindbisvirus-like and picornavirus-like supergroups. Sequence motifs of nucleic
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6. Beet western yellows virus-associated RNA: an independently replicating RNA that stimulates virus accumulation.
Infections of plants by subviral RNA agents, alone or in association with virus genomic RNA molecules, are well known. The ST9 strain of beet western yellows virus encapsidates not only the 5.6-kilobase genomic RNA that is typical of luteoviruses, but also a 2.8-kilobase-associated RNA that has a distinct nucleotide sequence. The ST9-associated RNA has been
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7. Identifying the Determinants in the Equatorial Domain of Buchnera GroEL Implicated in Binding Potato Leafroll Virus
Luteoviruses avoid degradation in the hemolymph of their aphid vector by interacting with a GroEL homolog from the aphid's primary endosymbiotic bacterium (Buchnera sp.). Mutational analysis of GroEL from the primary endosymbiont of Myzus persicae (MpB GroEL) revealed that the amino acids mediating binding of Potato leafroll virus (PLRV; Luteoviridae) are lo
American Society for Microbiology.
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8. Agroinfection as an alternative to insects for infecting plants with beet western yellows luteovirus.
Beet western yellows luteovirus, like other luteoviruses, cannot be transmitted to host plants by mechanical inoculation but requires an aphid vector, a feature that has heretofore presented a serious obstacle to the study of such viruses. In this paper we describe use of agroinfection to infect hosts with beet western yellows virus without recourse to aphid
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9. A loop 2 cytidine-stem 1 minor groove interaction as a positive determinant for pseudoknot-stimulated –1 ribosomal frameshifting
The molecular determinants of stimulation of –1 programmed ribosomal frameshifting (–1 PRF) by RNA pseudoknots are poorly understood. Sugarcane yellow leaf virus (ScYLV) encodes a 28-nt mRNA pseudoknot that promotes –1 PRF between the P1 (protease) and P2 (polymerase) genes in plant luteoviruses. The solution structure of the ScYLV pseudoknot reveals a
National Academy of Sciences.
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10. Potato Leafroll Virus Binds to the Equatorial Domain of the Aphid Endosymbiotic GroEL Homolog
A GroEL homolog with a molecular mass of 60 kDa, produced by the primary endosymbiotic bacterium (a Buchnera sp.) of Myzus persicae and released into the hemolymph, has previously been shown to be a key protein in the transmission of potato leafroll virus (PLRV). Like other luteoviruses and pea enation mosaic virus, PLRV readily binds to extracellular Buchne
American Society for Microbiology.