Taxonomy of Family: Rhabdoviridae
摘要
The Rhabdoviridae family consists of viruses characterized by negative-sense, single-stranded RNA (ssRNA) genomes ranging from 10.8 to 16.1 kilobases (kb) in length. The name Rhabdoviridae is derived from the Greek word “rhabdos,” which means rod-shaped, highlighting the distinctive morphology of these virions. These viruses are typically enveloped and exhibit bacilliform or bullet shapes, although some members are known to have non-enveloped filamentous forms. The genomes generally (though not universally) comprise single RNA molecules with partially complementary ends. Most rhabdovirus genomes encode five key structural proteins: nucleoprotein (N), phosphoprotein-polymerase-associated (P), matrix protein (M), glycoprotein (G), and large protein, RNA-dependent RNA polymerase (L). Additionally, many rhabdoviruses possess extra proteins encoded in supplementary genes or alternative open reading frames (ORFs) within the structural protein genes (Walker et al. 2018). Rhabdoviruses infect a broad spectrum of hosts, including plants, various animals (mammals, birds, reptiles, and fish), and arthropods. Within the Rhabdoviridae family, 253 plant virus species are distributed across 12 genera. Rhabdoviruses are also found in invertebrates, particularly arthropods, which may serve either as unique hosts or as vectors for transmission to other animals or plants. These viruses are significant pathogens affecting humans, livestock, fish, and agricultural crops. Plant rhabdoviruses can infect major crop families and numerous weed hosts, thriving in diverse environmental conditions from temperate to tropical climates. They induce a variety of symptoms in host plants, such as vein clearing and yellowing, mottling or mosaic patterns, tissue necrosis, and stunting (Walker et al. 2018).