''Alphanecrovirus'' is a genus of
viruses
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. Viruses are found in almo ...
, in the family ''
Tombusviridae
''Tombusviridae'' is a family of single-stranded positive sense RNA plant viruses. The family contains 18 genera in 3 subfamilies. The name is derived from Tomato bushy stunt virus (TBSV).
Genome
All viruses in the family have a non-segmente ...
''. Plants serve as natural hosts. There are four species in this genus.
Taxonomy
The genus contains the following species, listed by scientific name and followed by their common names:
* ''Alphanecrovirus nicotianae'',
Tobacco necrosis virus A
Tobacco necrosis virus A (TNV) is a plant pathogenic virus of the family ''Tombusviridae''.
Hosts and symptoms
Tobacco necrosis virus (TNV) can thrive on a handful of viable hosts. These hosts include tobacco, zucchini, cucumbers, carrots, Fre ...
* ''Alphanecrovirus oleae'',
Olive latent virus 1
* ''Alphanecrovirus solani'',
Potato necrosis virus
* ''Alphanecrovirus tessellati'',
Olive mild mosaic virus
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.
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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 the premature termination model of subgenomic RNA transcription is the method of transcription. The virus exits the host cell by tubule-guided viral movement. Plants serve as the natural host. Transmission routes are mechanical, seed borne, and contact.[
]
References
External links
Viralzone: Alphanecrovirus
ICTV
{{Taxonbar, from=Q18822334
Tombusviridae
Virus genera