Emaravirus

Emaravirus
Virus classification
Group:	Group V ((−)ssRNA)
Order:	Unassigned
Family:	Unassigned
Genus:	Emaravirus
Type species
European mountain ash ringspot-associated virus

Emaravirus is a genus of plant viruses. The genus has five species: European mountain ash ringspot-associated virus (type species), Fig mosaic virus, Pigeonpea sterility mosaic virus, Raspberry leaf blotch virus, and Rose rosette virus. European mountain ash ringspot-associated virus is associated with a leaf mottling and ringspot disease of European mountain ash Sorbus aucuparia. It can be transmitted by grafting and possibly mites.

Virology

The virion particle is between 80-100 nm and consists of an enveloped ribonucleocapsid that exhibits helical symmetry. The genomes are segmented, consisting of four strands of negative-sense single-stranded RNA.

Taxonomy

Emaravirus has the closest phylogenetic relationship with members of the genera Tospovirus and Orthobunyavirus. The 3' and 5' ends of the genomic RNAs are complementary (similar to viruses of the Bunyaviridae family), 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 tenuiviruses.