''Ourmiavirus'' is a genus of

positive-strand RNA viruses Positive-strand RNA viruses (+ssRNA viruses) are a group of related viruses that have positive-sense, single-stranded genomes made of ribonucleic acid. The positive-sense genome can act as messenger RNA (mRNA) and can be directly translated in ...

Cucurbits The Cucurbitaceae, also called cucurbits or the gourd family, are a plant family consisting of about 965 species in around 95 genera, of which the most important to humans are: *''Cucurbita'' – squash, pumpkin, zucchini, some gourds *''Lagena ...

, cherry, and

cassava ''Manihot esculenta'', common name, commonly called cassava (), manioc, or yuca (among numerous regional names), is a woody shrub of the spurge family, Euphorbiaceae, native to South America. Although a perennial plant, cassava is extensively ...

serve as natural hosts. There are three species in this genus. Diseases associated with this genus include: OuMV: yellowing and chlorotic spot symptoms.

Structure

Viruses in the genus ''Ourmiavirus'' are non-enveloped, with icosahedral and bacilliform geometries, and T=1 symmetry. The diameter is around 18 nm, with a length of 30 nm.

Genome

Genomes are linear and segmented, around 2.8kb in length.

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. Cucurbits, cherry, and cassava serve as the natural host.

Taxonomy

The genus has three species: *'' Cassava virus C'' *'' Epirus cherry virus'' *'' Ourmia melon virus''

References

External links

ICTV Report: ''Ourmiavirus''

{{Taxonbar, from=Q7111295 Positive-sense single-stranded RNA viruses Virus genera