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Virus classification
Group: Group IV ((+)ssRNA)
Family: Bromoviridae
Genus: Cucumovirus
Type Species

Cucumovirus is a genus of viruses, in the family Bromoviridae. Plants serve as natural hosts. There are currently four species in this genus including the type species Cucumber mosaic virus.[1][2]


Group: ssRNA(+)



Viruses in Cucumovirus are non-enveloped, with icosahedral and Spherical geometries, and T=3 symmetry. The diameter is around 29 nm. Genomes are linear and segmented, tripartite.[1]

Genus Structure Symmetry Capsid Genomic arrangement Genomic segmentation
Cucumovirus Icosahedral T=3 Non-enveloped Linear Segmented

Life cycle[edit]

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 internal initiation 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 and contact.[1]

Genus Host details Tissue tropism Entry details Release details Replication site Assembly site Transmission
Cucumovirus Plants None Viral movement; mechanical inoculation Viral movement Cytoplasm Cytoplasm Mechanical inoculation: insects; contact


It is thought that the Cucumovirus is present worldwide. It is known to occur in Eurasia, Australia, Canada, France, India, Japan, North and South Korea, Morocco, New Zealand, Poland, Spain, the US, and the former USSR. Its natural hosts belong to the domain Eukaryota. The virus is transmitted by vector, mechanical inoculation, grafting, or seeds, and it is transmitted in a non-persistent manner. The vectors may be arthropods, specifically insects of the order Hemiptera, family aphidae (colloquially one would say cucumovirus is transmitted by aphids).[3]


  1. ^ a b c "Viral Zone". ExPASy. Retrieved 15 June 2015. 
  2. ^ a b ICTV. "Virus Taxonomy: 2014 Release". Retrieved 15 June 2015. 
  3. ^ "ICTVdb Descriptions". International Committee on the Taxonomy of Viruses. Referenced February 18, 2008.

External links[edit]