Machlomovirus

Machlomovirus is a genus of plant viruses, in the family Tombusviridae. Plants serve as natural hosts. There is currently only one species in this genus: the type species Maize chlorotic mottle virus[1][2] (MCMV), which causes significant losses in maize production worldwide.[3] MCMV was first identified in the U.S. state of Kansas causing corn lethal necrosis, a severe disease that negatively affects all stages of development for maize plants.[4]

Machlomovirus
Virus classification
(unranked): Virus
Realm: Riboviria
Kingdom: Orthornavirae
Phylum: Kitrinoviricota
Class: Tolucaviricetes
Order: Tolivirales
Family: Tombusviridae
Subfamily: Procedovirinae
Genus: Machlomovirus
Type species
Maize chlorotic mottle virus

Taxonomy

Group: ssRNA(+)

[2]

Structure

Viruses in Machlomovirus are non-enveloped, with icosahedral and spherical geometries, and T=3 symmetry. The diameter is around 28-34 nm. Genomes are linear, around 4-5.4kb in length.[1][5]

GenusStructureSymmetryCapsidGenomic arrangementGenomic segmentation
MachlomovirusIcosahedralT=3Non-envelopedLinearMonopartite

Life cycle

Viral replication is cytoplasmic. Entry into the host cell is achieved by penetration into the host cell. Replication follows the positive stranded RNA virus replication model. Positive stranded RNA virus transcription, using the premature termination model of subgenomic RNA transcription is the method of transcription. Translation takes place by leaky scanning, and suppression of termination. The virus exits the host cell by tubule-guided viral movement. Plants serve as the natural host. Transmission routes are mechanical, seed borne, and contact.[1]

GenusHost detailsTissue tropismEntry detailsRelease detailsReplication siteAssembly siteTransmission
MachlomovirusPlantsNoneViral movement; mechanical inoculationViral movementCytoplasmCytoplasmMechanical: contact; seed
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References
  1. "Viral Zone". ExPASy. Retrieved 15 June 2015.
  2. ICTV. "Virus Taxonomy: 2014 Release". Retrieved 15 June 2015.
  3. Wu, J. X.; Wang, Q; Liu, H; Qian, Y. J.; Xie, Y; Zhou, X. P. (2013). "Monoclonal antibody-based serological methods for maize chlorotic mottle virus detection in China". Journal of Zhejiang University Science B. 14 (7): 555–62. doi:10.1631/jzus.B1200275. PMC 3709059. PMID 23825140.
  4. Niblett, C. L.; Claflin, L. E. (1978). "Corn lethal necrosis - a new virus disease of corn in Kansas". Plant Disease Reporter. 62 (1): 15–19.
  5. Nutter, R. C.; Scheets, K; Panganiban, L. C.; Lommel, S. A. (1989). "The complete nucleotide sequence of the maize chlorotic mottle virus genome". Nucleic Acids Research. 17 (8): 3163–77. doi:10.1093/nar/17.8.3163. PMC 317721. PMID 2726455.
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