Differences in host ranges, and
Differences in genome nucleotide sequences of more than 50%,
Differences in gene product sequences.
|
Type Species |
(CaMV) |
Members of this genus have particles and cytoplasmic inclusions similar to those of species in the genera “Soybean chlorotic mottle-like viruses”, “Petunia vein clearing-like viruses” and “Cassava vein mosaic-like viruses”, but differ from them in genome organization. Isometric particles are about 50 nm in diameter with a T = 7 (420 subunits) multilayered structure (Fig. 1).
Most species are transmitted in a semipersistent manner by aphids. Transmission requires a virus-encoded protein (aphid transmission factor) which is encoded by ORF2.
Virions occur in the cytoplasm, and in some cases in the nucleus. Cytoplasmic virions are associated with electron-dense proteinaceous inclusion bodies (for caulimoviruses, the product of ORF6). The product of ORF2 also forms inclusion bodies which are electron translucent. Inclusion bodies can be seen by light microscopy as well as by electron microscopy.
The genome contains six ORFs with the organization shown in Figure 2.
List of Species Demarcation Criteria in the Genus
The criteria demarcating species in the genus are:
|
Differences in host ranges, and |
|
Differences in genome nucleotide sequences of more than 50%, |
|
Differences in gene product sequences. |
Official virus species names are in italics. Tentative virus species names, alternative names ( ), strains or serotypes are not italicized. Virus names, CMI/AAB description numbers ( ), genome sequence accession numbers [ ], and assigned abbreviations ( ) are:
|
Blueberry red ringspot virus (327) |
(BRRV) | |
|
Carnation etched ring virus (182) |
[EM_VI:CERVDNA] |
(CERV) |
|
Cauliflower mosaic virus (24; 243) |
[EM_VI:CAMVG2, EM_VI:MCACOMGEN, [EM_VI:MCA1841] EM_VI:CAMVG1, EM_VI:MCACDH] |
(CaMV) |
|
Dahlia mosaic virus (51) |
(DMV) | |
|
Figwort mosaic virus |
[EM_VI:CAFMCXX] |
(FMV) |
|
Horseradish latent virus |
(HRLV) | |
|
Mirabilis mosaic virus |
(MiMV) | |
|
Strawberry vein banding virus (219) |
[EMVI:SVBVCOMGN] |
(SVBV) |
|
Thistle mottle virus |
(ThMoV) |
Tentative Species in the Genus
|
Aquilegia necrotic mosaic virus |
(ANMV) |
|
Cestrum yellow leaf curling virus |
(CmYLCV) |
|
Plantago virus 4 |
(PlV-4) |
|
Sonchus mottle virus |
(SMoV) |
|
|  |