''Emaravirus'' is a genus of
negative-strand RNA viruses which infect plants. The
plant virus
Plant viruses are viruses that affect plants. Like all other viruses, plant viruses are obligate intracellular parasites that do not have the molecular machinery to replicate without a host. Plant viruses can be pathogenic to higher plants.
...
group is the sole genus in the family ''Fimoviridae''. The genus has 21 species.
Structure
Virions of this genus are between 80 and 100 nm and consists of an enveloped
ribonucleocapsid
A capsid is the protein shell of a virus, enclosing its genetic material. It consists of several oligomeric (repeating) structural subunits made of protein called protomers. The observable 3-dimensional morphological subunits, which may or ma ...
that exhibits helical symmetry.
Genome
The genomes are segmented, consisting of four strands of
negative-sense single-stranded RNA.
Phylogenetics
''Emaravirus'' has the closest phylogenetic relationship with members of the genera ''
Orthotospovirus'' and ''
Orthobunyavirus
''Orthobunyavirus'' is a genus of the '' Peribunyaviridae'' family in the order ''Bunyavirales''. There are currently ~170 viruses recognised in this genus. These have been assembled into 103 species and 20 serogroups.
The name ''Orthobunyavirus ...
''. The 3' and 5' ends of the genomic RNAs are complementary (similar to viruses of the ''
Bunyavirales
''Bunyavirales'' is an order of segmented negative-strand RNA viruses with mainly tripartite genomes. Member viruses infect arthropods, plants, protozoans, and vertebrates. It is the only order in the class ''Ellioviricetes''. The name ''Bunyavir ...
'' order), with the sequence 5'-AGUAGUGUUCUCC-3' at the 5' terminus and 5'-GGAGUUCACUACU-3' at the 3' terminus. However, the number of genome segments and gene sequences distinguishes emaraviruses from bunyaviruses and
tenuivirus
''Tenuivirus'' is a plant virus genus belonging to ''Phenuiviridae'' family in the order ''Bunyavirales''. These plant viruses cause diseases in their host plants. Typical symptoms are chlorotic stripes on the affected leaves. This group of virus ...
es.
Taxonomy
The following species are recognized:
References
External links
*
ICTV report: ''Fimoviridae''
Bunyavirales
Viral plant pathogens and diseases
Virus genera
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