Vitivirus

Vitivirus is a genus of viruses in the order Tymovirales, in the family Betaflexiviridae.^[1][2] Plants serve as natural hosts. There are 19 species in this genus.^[1][3]

Vitivirus
Virus classification
(unranked):	Virus
Realm:	Riboviria
Kingdom:	Orthornavirae
Phylum:	Kitrinoviricota
Class:	Alsuviricetes
Order:	Tymovirales
Family:	Betaflexiviridae
Subfamily:	Trivirinae
Genus:	Vitivirus

Taxonomy

The genus contains the following species, listed by scientific name and followed by the exemplar virus of the species:^[1]

• Vitivirus alphactinidiae, Actinidia virus A
• Vitivirus alpharubi, Blackberry virus A
• Vitivirus alphavitis, Grapevine virus A
• Vitivirus ananasae Pineapple vitivirus A
• Vitivirus betactinidiae, Actinidia virus B
• Vitivirus betavitis, Grapevine virus B
• Vitivirus deltavitis, Grapevine virus D
• Vitivirus duomenthae, Mint virus 2
• Vitivirus epsilonvitis, Grapevine virus E
• Vitivirus etavitis, Grapevine virus H
• Vitivirus gammavitis, Grapevine virus G
• Vitivirus iotavitis, Grapevine virus I
• Vitivirus jeivitis, Grapevine virus J
• Vitivirus lambdavitis Grapevine virus L
• Vitivirus latensheraclei, Heracleum latent virus
• Vitivirus nuvitis, Grapevine virus N
• Vitivirus phivitis, Grapevine virus F
• Vitivirus vaccinii, Blueberry green mosaic associated virus
• Vitivirus viarracaciae, Arracacha virus V

Structure

Viruses in Vitivirus are non-enveloped, with flexuous and filamentous geometries. The diameter is around 12 nm. Genomes are linear, around 7.6kb in length. The genome codes for 5 proteins.^[3]

Genus	Structure	Symmetry	Capsid	Genomic arrangement	Genomic segmentation
Vitivirus	Filamentous		Non-enveloped	Linear	Monopartite

Life cycle

Viral replication is cytoplasmic, and is lysogenic. 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 is the method of transcription. The virus exits the host cell by tubule-guided viral movement. Plants serve as the natural host. The virus is transmitted via a vector (mechanical inoculation pseudococcid mealybugs and aphids). Transmission routes are vector and mechanical.^[3]

Genus	Host details	Tissue tropism	Entry details	Release details	Replication site	Assembly site	Transmission
Vitivirus	Plants	None	Viral movement; mechanical inoculation	Viral movement	Cytoplasm	Cytoplasm	Mechanical inoculation: pseudococcid mealybugs; Mechanical inoculation: aphids