Velarivirus

Velarivirus is a genus of viruses, in the family Closteroviridae.[1] Plants serve as natural hosts. There are currently seven species in this genus, including the type species Grapevine leafroll-associated virus 7. Diseases associated with this genus include: GLRaV-7: symptomless in white-berried grapevine cultivar from Albania. However, it induces leafroll symptoms onto grafted cv. cabernet.[1][2]

Velarivirus
Virus classification
(unranked): Virus
Realm: Riboviria
Kingdom: Orthornavirae
Phylum: Kitrinoviricota
Class: Alsuviricetes
Order: Martellivirales
Family: Closteroviridae
Genus: Velarivirus
Type species
Grapevine leafroll-associated virus 7

Taxonomy

Group: ssRNA(+)

[1]

Structure

Viruses in the genus Velarivirus are non-enveloped, with filamentous geometries. These viruses are about 1500-1700 nm long. Genomes are linear, around 16-17kb in length. The genome codes for 10 proteins.[1][2]

GenusStructureSymmetryCapsidGenomic arrangementGenomic segmentation
VelarivirusFilamentousNon-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 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.[1][2]

GenusHost detailsTissue tropismEntry detailsRelease detailsReplication siteAssembly siteTransmission
VelarivirusPlantsNoneViral movement; mechanical inoculationViral movementCytoplasmCytoplasmMechanical inoculation: insects

References
  1. "ICTV Report Closteroviridae".
  2. "Viral Zone". ExPASy. Retrieved 13 August 2015.
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