Mastrevirus
Mastrevirus is a genus of ssDNA viruses, in the family Geminiviridae. Mostly monocotyledonous plants serve as natural hosts. They are vectored by planthoppers. There are currently 41 species in this genus including the type species Maize streak virus. Diseases associated with this genus include: maize streak virus: maize streak disease (MSD).[1][2]
| Mastrevirus | |
|---|---|
Virus classification  | |
| (unranked): | Virus |
| Realm: | Monodnaviria |
| Kingdom: | Shotokuvirae |
| Phylum: | Cressdnaviricota |
| Class: | Repensiviricetes |
| Order: | Geplafuvirales |
| Family: | Geminiviridae |
| Genus: | Mastrevirus |
| Type species | |
| Maize streak virus | |
Taxonomy
The following species are recognized:[2]
- Axonopus compressus streak virus
- Bromus catharticus striate mosaic virus
- Chickpea chlorosis Australia virus
- Chickpea chlorosis virus
- Chickpea chlorotic dwarf virus
- Chickpea redleaf virus
- Chickpea yellow dwarf virus
- Chickpea yellows virus
- Chloris striate mosaic virus
- Digitaria ciliaris striate mosaic virus
- Digitaria didactyla striate mosaic virus
- Digitaria streak virus
- Dragonfly-associated mastrevirus
- Eragrostis minor streak virus
- Eragrostis streak virus
- Maize streak dwarfing virus
- Maize streak Reunion virus
- Maize streak virus
- Maize striate mosaic virus
- Miscanthus streak virus
- Oat dwarf virus
- Panicum streak virus
- Paspalum dilatatum striate mosaic virus
- Paspalum striate mosaic virus
- Rice latent virus 1
- Rice latent virus 2
- Saccharum streak virus
- Sporobolus striate mosaic virus 1
- Sporobolus striate mosaic virus 2
- Sugarcane chlorotic streak virus
- Sugarcane streak Egypt virus
- Sugarcane streak Reunion virus
- Sugarcane streak virus
- Sugarcane striate virus
- Sugarcane white streak virus
- Sweet potato symptomless virus 1
- Switchgrass mosaic-associated virus
- Tobacco yellow dwarf virus
- Urochloa streak virus
- Wheat dwarf India virus
- Wheat dwarf virus
Structure
Viruses in Mastrevirus are non-enveloped, with icosahedral geometries, and T=1 symmetry. The diameter is around 22 nm, with a length of 38 nm. Genomes are circular and non-segmented, around 2.6-2.8kb in length.[1]
| Genus | Structure | Symmetry | Capsid | Genomic arrangement | Genomic segmentation |
|---|---|---|---|---|---|
| Mastrevirus | Twinned Icosahedral | Incomplete T=1 | Non-enveloped | Circular | Monopartite |
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. Mostly monocotyledonous plants serve as the natural host. The virus is transmitted via a vector (leafhopper). Transmission routes are vector and mechanical.[1]
| Genus | Host details | Tissue tropism | Entry details | Release details | Replication site | Assembly site | Transmission |
|---|---|---|---|---|---|---|---|
| Mastrevirus | Dicots | None | Viral movement; mechanical inoculation | Budding | Nucleus | Nucleus | Leafhopper |
References
- "Viral Zone". ExPASy. Retrieved 15 June 2015.
- "Virus Taxonomy: 2019 Release". talk.ictvonline.org. International Committee on Taxonomy of Viruses. Retrieved 6 May 2020.