Alphanecrovirus


Alphanecrovirus is a genus of viruses, in the family Tombusviridae. 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 AAlphanecrovirus oleae, Olive latent virus 1Alphanecrovirus solani, Potato necrosis virusAlphanecrovirus 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.
GenusStructureSymmetryCapsidGenomic arrangementGenomic segmentation
AlphanecrovirusIcosahedralT=3Non-envelopedLinearMonopartite

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.
GenusHost detailsTissue tropismEntry detailsRelease detailsReplication siteAssembly siteTransmission
AlphanecrovirusPlants-Viral movement; mechanical inoculationViral movementCytoplasmCytoplasmMechanical: contact; seed