Bromoviridae is a family of viruses.[2] Plants serve as natural hosts. There are six genera in the family.[3][4]
Taxonomy
The following genera are assigned to the family:[3]
Alfamovirus
Anulavirus
Bromovirus
Cucumovirus
Ilarvirus
Oleavirus
Structure
Viruses in the family Bromoviridae are non-enveloped, with icosahedral and bacilliform geometries. The diameter is around 26-35 nm.[3][4]
Several different types of virion to be found in family Bromoviridae
Genus
Structure
Symmetry
Capsid
Genomic arrangement
Genomic segmentation
Ilarvirus
Icosahedral
T=3
Non-enveloped
Linear
Segmented
Anulavirus
Icosahedral
T=3
Non-enveloped
Linear
Segmented
Bromovirus
Icosahedral
T=3
Non-enveloped
Linear
Segmented
Oleavirus
Icosahedral
T=1
Non-enveloped
Linear
Segmented
Alfamovirus
Varies
Non-enveloped
Linear
Segmented
Cucumovirus
Icosahedral
T=3
Non-enveloped
Linear
Segmented
Genomes are linear and segmented, tripartite.[3][4]
Bromoviridae genome map
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, 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.[3][4]
Genus
Host details
Tissue tropism
Entry details
Release details
Replication site
Assembly site
Transmission
Ilarvirus
Plants
None
Viral movement; mechanical inoculation
Viral movement
Cytoplasm
Cytoplasm
Mechanical inoculation: insects; contact
Anulavirus
Plants
None
Viral movement; mechanical inoculation
Viral movement
Cytoplasm
Cytoplasm
Unknown
Bromovirus
Plants
None
Viral movement; mechanical inoculation
Viral movement
Cytoplasm
Cytoplasm
Mechanical inoculation: insects; contact
Oleavirus
Plants
None
Viral movement; mechanical inoculation
Viral movement
Cytoplasm
Cytoplasm
Mechanical inoculation: insects; contact
Alfamovirus
Plants
None
Viral movement; mechanical inoculation
Viral movement
Cytoplasm
Cytoplasm
Mechanical inoculation: insects
Cucumovirus
Plants
None
Viral movement; mechanical inoculation
Viral movement
Cytoplasm
Cytoplasm
Mechanical inoculation: insects; contact
References
^Lucas, R. W.; Larson, S. B.; McPherson, A. (2002). "The crystallographic structure of Brome mosaic virus" (PDF). Journal of Molecular Biology. 317 (1): 95–108. doi:10.1006/jmbi.2001.5389. PMID 11916381.
