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Necrovirus
''Necrovirus'' was a genus of viruses. In 2012, the genus was abolished and split into two genera that still bear its name: ''Alphanecrovirus'' and ''Betanecrovirus ''Betanecrovirus'' is a genus of viruses, in the family ''Tombusviridae ''Tombusviridae'' is a family of single-stranded positive sense RNA plant viruses. There are three subfamilies, 17 genera, and 95 species in this family. The name is de ...''. References {{Reflist Obsolete virus taxa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alphanecrovirus
''Alphanecrovirus'' is a genus of viruses, in the family ''Tombusviridae ''Tombusviridae'' is a family of single-stranded positive sense RNA plant viruses. There are three subfamilies, 17 genera, and 95 species in this family. The name is derived from '' Tomato bushy stunt virus'' (TBSV). Genome All viruses in the ...''. Plants serve as natural hosts. There are four species in this genus. Taxonomy The genus contains the following species: * '' Olive latent virus 1'' * '' Olive mild mosaic virus'' * '' Potato necrosis virus'' * '' Tobacco necrosis virus A'' Structure Viruses in ''Alphanecrovirus'' are non-enveloped, with icosahedral and spherical geometries, and T=3 symmetry. The diameter is around 28 nm. Genomes are linear, around 4kb in length. Life cycle Viral replication is cytoplasmic. Entry into the host cell is achieved by penetration into the host cell. Replication follows the positive stranded RNA virus replication model. Positive stranded RNA virus transc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Betanecrovirus
''Betanecrovirus'' is a genus of viruses, in the family ''Tombusviridae ''Tombusviridae'' is a family of single-stranded positive sense RNA plant viruses. There are three subfamilies, 17 genera, and 95 species in this family. The name is derived from '' Tomato bushy stunt virus'' (TBSV). Genome All viruses in the ...''. Plants serve as natural hosts. There are three species in this genus. Taxonomy The genus contains the following species: * '' Beet black scorch virus'' * '' Leek white stripe virus'' * '' Tobacco necrosis virus D'' Structure Viruses in ''Betanecrovirus'' are non-enveloped, with icosahedral and spherical geometries, and T=3 symmetry. The diameter is around 28 nm in diameter. Genomes are linear, around 4kb in length. Life cycle Viral replication is cytoplasmic. Entry into the host cell is achieved by penetration into the host cell. Replication follows the positive stranded RNA virus replication model. Positive stranded RNA virus transcription, using ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus (biology)
Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. ''Panthera leo'' (lion) and ''Panthera onca'' (jaguar) are two species within the genus '' Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants of an ancestral taxon are grouped together (i.e. phylogenetic analysis should clearly demons ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Virus
A virus is a submicroscopic infectious agent that replicates only inside the living cells of an organism. Viruses infect all life forms, from animals and plants to microorganisms, including bacteria and archaea. Since Dmitri Ivanovsky's 1892 article describing a non-bacterial pathogen infecting tobacco plants and the discovery of the tobacco mosaic virus by Martinus Beijerinck in 1898,Dimmock p. 4 more than 9,000 virus species have been described in detail of the millions of types of viruses in the environment. Viruses are found in almost every ecosystem on Earth and are the most numerous type of biological entity. The study of viruses is known as virology, a subspeciality of microbiology. When infected, a host cell is often forced to rapidly produce thousands of copies of the original virus. When not inside an infected cell or in the process of infecting a cell, viruses exist in the form of independent particles, or ''virions'', consisting of (i) the genetic material, i. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
