Odontoglossum ringspot virus

Odontoglossum ringspot virus (ORSV) is a plant pathogenic virus that belongs to the family Virgaviridae. It is one of the most common viruses affecting cultivated orchids, perhaps second only to the Cymbidium mosaic virus.[1] It causes spots on leaves and colored streaks on flowers.[1] If a plant is also infected with the Cymbidium mosaic virus, it can lead to a condition called blossom brown necrotic streak.[1]

Odontoglossum ringspot virus
Virus classification
(unranked): Virus
Realm: Riboviria
Kingdom: Orthornavirae
Phylum: Kitrinoviricota
Class: Alsuviricetes
Order: Martellivirales
Family: Virgaviridae
Genus: Tobamovirus
Species:
Odontoglossum ringspot virus
Synonyms
  • Tobacco mosaic virus—orchid strain

Phylogenetics

Its genome has been sequenced and contains approximately 6600 nucleotides organized into four open reading frames.[2][3] Its similarity to other tobamoviruses can be seen from the genetic data and the (limited) ability of a Tobacco mosaic virus modified to contain ORSV movement protein to infect tobacco.[4] However, only about 60% of the nucleotides in ORSV are identical with Tobacco mosaic virus.[3]

References
  1. JS Hu; S Ferreira; M Wang; MQ Xu (1993), "Detection of cymbidium mosaic virus, odontoglossum ringspot virus, tomato spotted wilt virus, and Potyviruses Infecting Orchids in Hawaii" (PDF), Plant Disease, 77 (5): 464–468, doi:10.1094/PD-77-0464, archived from the original (PDF) on 2009-05-15
  2. Chng, Cg; Wong, Sm; Mahtani, Ph; Loh, Cs; Goh, Cj; Kao, Mc; Chung, Mc; Watanabe, Y (Jun 1996), "The complete sequence of a Singapore isolate of odontoglossum ringspot virus and comparison with other tobamoviruses.", Gene, 171 (2): 155–61, doi:10.1016/0378-1119(96)00046-7, ISSN 0378-1119, PMID 8666266
  3. Ikegami, M; Isomura, Y; Matumoto, Y; Chatani, M; Inouye, N (1995), "The complete nucleotide sequence of odontoglossum ringspot virus (Cy-1 strain) genomic RNA.", Microbiology and Immunology, 39 (12): 995–1001, doi:10.1111/j.1348-0421.1995.tb03289.x, ISSN 0385-5600, PMID 8789059, S2CID 25097213
  4. Fenczik, Ca; Padgett, Hs; Holt, Ca; Casper, Sj; Beachy, Rn (Sep 1995), "Mutational analysis of the movement protein of odontoglossum ringspot virus to identify a host-range determinant.", Molecular Plant-Microbe Interactions, 8 (5): 666–73, doi:10.1094/MPMI-8-0666, ISSN 0894-0282, PMID 7579612
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