Further Characterization of Panicum Mosaic Virus and Its Associated Satellite Virus

Published on Jan 1, 1984in Phytopathology3.264
· DOI :10.1094/Phyto-74-313
F. G. Buzen1
Estimated H-index: 1
C. L. Niblett1
Estimated H-index: 1
+ 2 AuthorsM. A. Newman1
Estimated H-index: 1
  • References (0)
  • Citations (34)
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Cited By34
#1Jesse D. Pyle (A&M: Texas A&M University)H-Index: 5
#2Kranthi K. Mandadi (A&M: Texas A&M University)H-Index: 14
Last. Karen-Beth G. Scholthof (A&M: Texas A&M University)H-Index: 23
view all 3 authors...
ABSTRACT Positive-sense RNA viruses in the Tombusviridae family have genomes lacking a 5′ cap structure and prototypical 3′ polyadenylation sequence. Instead, these viruses utilize an extensive network of intramolecular RNA-RNA interactions to direct viral replication and gene expression. Here we demonstrate that the genomic RNAs of Panicum mosaic virus (PMV) and its satellites undergo sequence modifications at their 3′ ends upon infection of host cells. Changes to the viral and subviral genomes...
2 CitationsSource
#1Jesse D. Pyle (A&M: Texas A&M University)H-Index: 5
#2Karen-Beth G. Scholthof (A&M: Texas A&M University)H-Index: 23
Abstract Panicum mosaic virus (PMV) is a helper RNA virus for satellite RNAs (satRNAs) and a satellite virus (SPMV). Here, we describe modifications that occur at the 3′-end of a satRNA of PMV, satS. Co-infections of PMV+satS result in attenuation of the disease symptoms induced by PMV alone in Brachypodium distachyon and proso millet. The 375 nt satS acquires ~100–200 nts from the 3′-end of PMV during infection and is associated with decreased abundance of the PMV RNA and capsid protein in mill...
3 CitationsSource
#1Jesse D. Pyle (A&M: Texas A&M University)H-Index: 5
#2Judit Monis (University of California, Berkeley)H-Index: 2
Last. Karen-Beth G. Scholthof (A&M: Texas A&M University)H-Index: 23
view all 3 authors...
Abstract Over six decades ago, panicum mosaic virus (PMV) was identified as the first viral pathogen of cultivated switchgrass ( Panicum virgatum ). Subsequently, PMV was demonstrated to support the replication of both a satellite RNA virus (SPMV) and satellite RNA (satRNA) agents during natural infections of host grasses. In this study, we report the isolation and full-length sequences of two PMV satRNAs identified in 1988 from St. Augustinegrass ( Stenotaphrum secundatum ) and centipedegrass (...
4 CitationsSource
#1Mart Krupovic (Pasteur Institute)H-Index: 40
#2Jens H. Kuhn (NIH: National Institutes of Health)H-Index: 44
Last. Matthias G. Fischer (MPG: Max Planck Society)H-Index: 15
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Satellite viruses encode structural proteins required for the formation of infectious particles but depend on helper viruses for completing their replication cycles. Because of this unique property, satellite viruses that infect plants, arthropods, or mammals, as well as the more recently discovered satellite-like viruses that infect protists (virophages), have been grouped with other, so-called “sub-viral agents.” For the most part, satellite viruses are therefore not classified. We argue that ...
38 CitationsSource
#1Luis A. J. Mur (Aberystwyth University)H-Index: 44
#2Valentina Mazzamurro (University of Modena and Reggio Emilia)H-Index: 3
Last. Nicola PecchioniH-Index: 26
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Brachypodium is now a well-established model species for the grass family Poaceae, and a number of groups have developed Brachypodium pathosystems, focusing on diseases of cereal and turf and bioenergy grass species. In this review we consider some interactions of pathogens with Brachypodium including those involving rust, Fusarium Head Blight, Stagonospora and rice blast pathogens. A particularly well-characterised interaction with Panicum mosaic virus will also be described. Characterisation o...
Viral diseases cause significant losses in global agricultural production, yet little is known about grass antiviral defense mechanisms. We previously reported on host immune responses triggered by Panicum mosaic virus (PMV) and its satellite virus (SPMV) in the model C3 grass Brachypodium distachyon. To aid comparative analyses of C3 and C4 grass antiviral defenses, here, we establish B. distachyon and Setaria viridis (a C4 grass) as compatible hosts for seven grass-infecting viruses, including...
23 CitationsSource
#1Roger Hull (JIC: John Innes Centre)H-Index: 43
There are various small RNAs associated with plant pathogenic situations. Essentially, most fall into three groups, those that can replicate autonomously, those that require a functional virus for their replication and those formed as a host response to normal virus infection. The first group is termed viroids, the second group include satellites and defective nucleic acids (described in Chapter 7, Section IV, C) and the third group (si RNAs) are discussed in Chapter 9. In this chapter, I descri...
#1Maher Al Rwahnih (UC Davis: University of California, Davis)H-Index: 10
#2Steve Daubert (UC Davis: University of California, Davis)H-Index: 13
Last. Adib Rowhani (UC Davis: University of California, Davis)H-Index: 28
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We have identified the genome of a novel viral satellite in deep sequence analysis of double-stranded RNA from grapevine. The genome was 1,060 bases in length, and encoded two open reading frames. Neither frame was related to any known plant virus gene. But translation of the longer frame showed a protein sequence similar to those of other plant virus satellites. Other than in commonalities they shared in this gene sequence, members of that group were extensively divergent. The reading frame in ...
10 CitationsSource
#1Debora L. Makino (UCI: University of California, Irvine)H-Index: 5
#2Steven B. Larson (UCI: University of California, Irvine)H-Index: 22
Last. Alexander McPherson (UCI: University of California, Irvine)H-Index: 51
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Abstract The structure of Panicum Mosaic Virus (PMV) was determined by X-ray diffraction analysis to 2.9 A resolution. The crystals were of pseudo symmetry F23; the true crystallographic unit cell was of space group P 2 1 with a = 411.7 A, b = 403.9 A and c = 412.5 A, with β = 89.7°. The asymmetric unit was two entire T = 3 virus particles, or 360 protein subunits. The structure was solved by conventional molecular replacement from two distant homologues, Cocksfoot Mottle Virus (CfMV) and Tobacc...
8 CitationsSource
#1Kranthi K. Mandadi (A&M: Texas A&M University)H-Index: 14
#2Karen-Beth G. Scholthof (A&M: Texas A&M University)H-Index: 23
Panicum mosaic virus (PMV) and its satellite virus (SPMV) together infect several small grain crops, biofuel, and forage and turf grasses. Here, we establish the emerging monocot model Brachypodium (Brachypodium distachyon) as an alternate host to study PMV- and SPMV-host interactions and viral synergism. Infection of Brachypodium with PMV+SPMV induced chlorosis and necrosis of leaves, reduced seed set, caused stunting, and lowered biomass, more than PMV alone. Toward gaining a molecular underst...
49 CitationsSource