Betanecrovirus is a genus of viruses, in the family Tombusviridae. Plants serve as natural hosts. There are three species in this genus.
Taxonomy The genus contains the following species, listed by scientific name and followed by their common names: Betanecrovirus betae, Beet black scorch virus Betanecrovirus nicotianae, Tobacco necrosis virus D Betanecrovirus porri, Leek white stripe virus
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.
Genus Structure Symmetry Capsid Genomic arrangement Genomic segmentationBetanecrovirusIcosahedralT=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.
Genus Host details Tissue tropism Entry details Release details Replication site Assembly site TransmissionBetanecrovirusPlantsNoneViral movement; mechanical inoculationViral movementCytoplasmCytoplasmMechanical: contact; seed
References
External links Viralzone: Betanecrovirus ICTV