Everything about Partitiviridae totally explained
Partitiviridae are
plant and
fungi group III
viruses with double stranded
RNA genomes. Their name comes from the Latin
partitius which means divided and they're called this as they've segmented genomes.
There are three genera within the
Partitiviridae family:
Partitiviruses mainly infect fungi whereas
Alphacryptoviruses and
Betacryptoviruses infect plants. The viruses are quite specific when it comes to their host and in plants they're generally transmitted by seeds. Fungal Partitiviruses are generally only transmitted vertically or be
hyphal anastomosis. Until recently there was thought to be a fourth genus in this family, the
Chrysovirus which infect
fungi such as
penicillium but they've formed their own family called
Chrysoviridae which include the
Penicillium chrysogenum virus.
Genome and Structure
Partitiviruses have double stranded
RNA genomes divided into two genomic segments and there may be additional subgenomic segments. The
genome segments are packaged in the same
virus particle, the larger segment codes for the RNA-dependent
RNA polymerase and the smaller codes for the coat
protein. The total length of the genome is 3000-10000
nucleotides in length. The virus particle is non-enveloped and
icosahedral with a diameter between 30-35nm.
Further Information
Get more info on 'Partitiviridae'.
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