Babuvirus is a genus of viruses, in the family Nanoviridae.[1]Musa species serve as natural hosts. There are three species in this genus. Diseases associated with this genus include: stunting, severe necrosis and early plant death. BBTV induces banana bunchy top disease (BBTD).[1][2][3]
Taxonomy
The following species are included in the genus:[3]
Genome map of species Banana bunchy top virus (BBTV) showing six segments.
Viruses in the genus Babuvirus are non-enveloped, with icosahedral and round geometries, and T=1 symmetry. The diameter is around 18-19 nm.
Genomes are multipartite with 6 to 8 circular segments. Genome size is around 81 kb in totsl.[1][2]
Genus
Structure
Symmetry
Capsid
Genomic arrangement
Genomic segmentation
Babuvirus
Icosahedral
T=1
Non-enveloped
Circular
Segmented
Life cycle
Viral replication is nuclear. Entry into the host cell is achieved by penetration into the host cell. Replication follows the ssDNA rolling circle model. DNA templated transcription is the method of transcription. The virus exits the host cell by nuclear pore export, and tubule-guided viral movement. Musa species serve as the natural host. The virus is transmitted via a vector (aphids). Transmission routes are vector.[1][2]
Genus
Host details
Tissue tropism
Entry details
Release details
Replication site
Assembly site
Transmission
Babuvirus
Plants: musa species
Phloem
Viral movement; mechanical inoculation
Secretion; viral movement
Nucleus
Nucleus
Aphids
References
^ abcd"ICTV Report Nanoviridae".
^ abc"Viral Zone". ExPASy. Retrieved 12 June 2015.
^ ab"Virus Taxonomy: 2020 Release". International Committee on Taxonomy of Viruses (ICTV). March 2021. Retrieved 12 May 2021.