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Caulimoviridae
''Caulimoviridae'' is a family of viruses infecting plants. There are 94 species in this family, assigned to 11 genera. Viruses belonging to the family ''Caulimoviridae'' are termed double-stranded DNA (dsDNA) reverse-transcribing viruses (or pararetroviruses) i.e. viruses that contain a reverse transcription stage in their replication cycle. This family contains all plant viruses with a dsDNA genome that have a reverse transcribing phase in their lifecycle. Taxonomy The following genera are recognized: *'' Badnavirus'' *'' Caulimovirus'' *'' Cavemovirus'' *'' Dioscovirus'' *'' Petuvirus'' *'' Rosadnavirus'' *'' Ruflodivirus'' *'' Solendovirus'' *'' Soymovirus'' *'' Tungrovirus'' *'' Vaccinivirus'' Virus particle structure All viruses of this family are non-enveloped. Virus particles are either bacilliform or isometric. The type of nucleocapsid incorporated into the virus structure determines the size of the viral particles. Bacilliform particles are approximately 35–50 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caulimoviridae
''Caulimoviridae'' is a family of viruses infecting plants. There are 94 species in this family, assigned to 11 genera. Viruses belonging to the family ''Caulimoviridae'' are termed double-stranded DNA (dsDNA) reverse-transcribing viruses (or pararetroviruses) i.e. viruses that contain a reverse transcription stage in their replication cycle. This family contains all plant viruses with a dsDNA genome that have a reverse transcribing phase in their lifecycle. Taxonomy The following genera are recognized: *'' Badnavirus'' *'' Caulimovirus'' *'' Cavemovirus'' *'' Dioscovirus'' *'' Petuvirus'' *'' Rosadnavirus'' *'' Ruflodivirus'' *'' Solendovirus'' *'' Soymovirus'' *'' Tungrovirus'' *'' Vaccinivirus'' Virus particle structure All viruses of this family are non-enveloped. Virus particles are either bacilliform or isometric. The type of nucleocapsid incorporated into the virus structure determines the size of the viral particles. Bacilliform particles are approximately 35–50 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Badnavirus
''Badnavirus'' is a genus of viruses, in the family ''Caulimoviridae'' order ''Ortervirales''. Plants serve as natural hosts. There are 67 species in this genus. Diseases associated with this genus include: CSSV: leaf chlorosis, root necrosis, red vein banding in young leaves, small mottled pods, and stem/root swelling followed by die-back. Infection decreases yield by 25% within one year, 50% within two years and usually kills trees within 3–4 years. Taxonomy The following species are recognized: *'' Aglaonema bacilliform virus'' *'' Banana streak GF virus'' *'' Banana streak IM virus'' *'' Banana streak MY virus'' *'' Banana streak OL virus'' *'' Banana streak UA virus'' *'' Banana streak UI virus'' *'' Banana streak UL virus'' *'' Banana streak UM virus'' *'' Banana streak VN virus'' *'' Birch leafroll-associated virus'' *'' Blackberry virus F'' *'' Bougainvillea chlorotic vein banding virus'' *'' Cacao bacilliform Sri Lanka virus'' *''Cacao mild mosaic virus'' *''Cacao swo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tungrovirus
''Tungrovirus'' is a genus of viruses, in the family ''Caulimoviridae'', order ''Ortervirales''. Monocots and family Poaceae serve as natural hosts. There is only one species in this genus: ''Rice tungro bacilliform virus''. Diseases associated with this genus include: stunting, yellow to orange leaf discoloration with fewer tillers. Tungro means 'degenerated growth' in a Filipino dialect and the virus was first observed in the Philippines 1975. Structure Viruses in ''Tungrovirus'' are non-enveloped, with icosahedral and bacilliform geometries, and T=3 symmetry. Genomes are circular. The virus withstands temperatures below 63-degree Celsius for 10 minutes. The tungro virus is known to have at least two strains - S and M. The 'S' strain in these varieties produces conspicuous interveinal chlorosis, giving an appearance of yellow stripe and sometimes irregular chlorotic specks on younger leaves. On the other hand, the 'M' strain produces only mottling. Life cycle Viral replic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Retrovirus
A retrovirus is a type of virus that inserts a DNA copy of its RNA genome into the DNA of a host cell that it invades, thus changing the genome of that cell. Once inside the host cell's cytoplasm, the virus uses its own reverse transcriptase enzyme to produce DNA from its RNA genome, the reverse of the usual pattern, thus ''retro'' (backwards). The new DNA is then incorporated into the host cell genome by an integrase enzyme, at which point the retroviral DNA is referred to as a provirus. The host cell then treats the viral DNA as part of its own genome, transcribing and translating the viral genes along with the cell's own genes, producing the proteins required to assemble new copies of the virus. Although retroviruses have different subfamilies, they have three basic groups: the oncoretroviruses (oncogenic retroviruses), the lentiviruses (slow retroviruses) and the spumaviruses (foamy viruses). The oncoretroviruses are able to cause cancer in some species, the lentiviru ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Petuvirus
''Petuvirus'' is a genus of viruses, in the family ''Caulimoviridae'' order ''Ortervirales''. Plants serve as natural hosts. There is only one species in this genus: ''Petunia vein clearing virus''. Diseases associated with this genus include: plants: chlorotic vein clearing, leaf malformation. Structure Viruses in Petuvirus are non-enveloped, with icosahedral geometries, and T=7 symmetry. The diameter is around 45-50 nm. Genomes are circular and non-segmented. Its genome is 7200 nucleotides long and has a guanine + cytosine content of 38.2%. There are terminally redundant sequences on the genome which have direct terminal repeats that are reiterated internally in inverted form. The virus codes for 2 ORFs. Its capsid shells are multilayered. The capsid is round to elongate with icosahedral symmetry and the virus is composed of 16% nucleic acid. ''Petuviruses'' have a buoyant density in CsCl of 1.31 g cm-3 and there are 1 sedimenting component(s) found in purified preparation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caulimovirus
''Caulimovirus'' is a genus of viruses, in the family ''Caulimoviridae'' order ''Ortervirales''. Plants serve as natural hosts. There are 12 species in this genus. Diseases associated with this genus include: vein-clearing or banding mosaic. Taxonomy The genus contains the following species: *'' Angelica bushy stunt virus'' *'' Atractylodes mild mottle virus'' *'' Carnation etched ring virus'' *''Cauliflower mosaic virus'' *'' Dahlia mosaic virus'' *'' Figwort mosaic virus'' *'' Horseradish latent virus'' *'' Lamium leaf distortion virus'' *'' Mirabilis mosaic virus'' *'' Soybean Putnam virus'' *'' Strawberry vein banding virus'' *'' Thistle mottle virus'' Structure Viruses in ''Caulimovirus'' are non-enveloped, with icosahedral geometries, and T=7, T=7 symmetry. The diameter is around 50 nm. Genomes are circular and non-segmented. The genome codes for 6 to 7 proteins. Life cycle Viral replication is nuclear/cytoplasmic. Entry into the host cell is achieved by attachment ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cavemovirus
''Cavemovirus'' is a genus of viruses, in the family ''Caulimoviridae'' order ''Ortervirales ''Ortervirales'' is an order that contains all accepted species of single-stranded RNA viruses that replicate through a DNA intermediate (Group VI) and all accepted species of double-stranded DNA viruses (except '' Hepadnaviridae'') that replic ...''. Plants serve as natural hosts. There are three species in this genus. Diseases associated with this genus include: vein-clearing or banding mosaic. Taxonomy The genus contains the following species: *'' Cassava vein mosaic virus'' *'' Epiphyllum virus 4'' *'' Sweet potato collusive virus'' Structure Viruses in ''Cavemovirus'' are non-enveloped, with icosahedral geometries, and T=7 symmetry. The diameter is around 50 nm. Genomes are circular and non-segmented. The genome codes for 5 proteins. Life cycle Viral replication is nuclear/cytoplasmic. Replication follows the dsDNA (RT) replication model. dsDNA (RT) transcription is the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Petuvirus
''Petuvirus'' is a genus of viruses, in the family ''Caulimoviridae'' order ''Ortervirales''. Plants serve as natural hosts. There is only one species in this genus: ''Petunia vein clearing virus''. Diseases associated with this genus include: plants: chlorotic vein clearing, leaf malformation. Structure Viruses in Petuvirus are non-enveloped, with icosahedral geometries, and T=7 symmetry. The diameter is around 45-50 nm. Genomes are circular and non-segmented. Its genome is 7200 nucleotides long and has a guanine + cytosine content of 38.2%. There are terminally redundant sequences on the genome which have direct terminal repeats that are reiterated internally in inverted form. The virus codes for 2 ORFs. Its capsid shells are multilayered. The capsid is round to elongate with icosahedral symmetry and the virus is composed of 16% nucleic acid. ''Petuviruses'' have a buoyant density in CsCl of 1.31 g cm-3 and there are 1 sedimenting component(s) found in purified preparation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Banana Streak Virus
Banana streak virus (BSV) is a name given to various plant viruses in the genus ''Badnavirus''. Banana streak was first identified in 1958 in Côte d’Ivoire and is now in many countries in the tropics. The primary symptoms of disease are chlorotic streaks on the banana leaves and splitting of their pseudostem. In later stages of the disease, these streaks may become necrotic, and the heart of the pseudostem may rot, ultimately leading to death of the plant. Although not necessary to complete the life cycle, members of ''Caulimoviridae'' (as well as ''Geminiviridae'') have been shown to integrate into their host genomes. When the host is stressed, the integrated genome of BSV may be able to recombine out into its episomal form, though the mechanism is not well understood. While there are several copies of BSV in ''Musa Musa may refer to: Places * Mūša, a river in Lithuania and Latvia * Musa, Azerbaijan, a village in Yardymli Rayon * Musa, Iran, a village in Ilam Province * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solendovirus
''Solendovirus'' is a genus of viruses, in the family ''Caulimoviridae'' order ''Ortervirales''. Plants serve as natural hosts. There are two species in this genus. Diseases associated with this genus include: TVCV: vein-clearing symptoms in ''N. edwardsonii''. Taxonomy The genus contains the following species: *''Sweet potato vein clearing virus'' *''Tobacco vein clearing virus'' Structure Viruses in ''Solendovirus'' are non-enveloped, with icosahedral geometries, and T=7 symmetry. The diameter is around 50 nm. Genomes are circular and non-segmented, around 7.7kb in length. The genome has 3 open reading frames. Life cycle Viral replication is nuclear/cytoplasmic. Replication follows the dsDNA(RT) replication model. dsDNA(RT) transcription is the method of transcription. The virus exits the host cell by nuclear pore export, and tubule-guided viral movement. Plants serve as the natural host. Transmission routes are seed borne. References External links Viralzone: Sol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
