Evolutionary history of Cucumber mosaic virus deduced by phylogenetic analyses

Research output: Contribution to journalArticle

169 Citations (Scopus)

Abstract

Cucumber mosaic virus (CMV) is an RNA plant virus with a tripartite genome and an extremely broad host range. Previous evolutionary analyses with the coat protein (CP) and 5′ nontranslated region (NTR) of RNA 3 suggested subdivision of the virus into three groups, subgroups IA, IB, and II. In this study 15 strains of CMV whose nucleotide sequences have been determined were used for a complete phylogenetic analysis of the virus. The trees estimated for open reading frames (ORFs) located on the different RNAs were not congruent and did not completely support the subgrouping indicated by the CP ORF, indicating that different RNAs had independent evolutionary histories. This is consistent with a reassortment mechanism playing an important role in the evolution of the virus. The evolutionary trees of the la and 3a ORFs were more compact and displayed more branching than did those of the 2a and CP ORFs. This may reflect more rigid host-interactive constraints exerted on the la and 3a ORFs. In addition, analysis of the 3′ NTR that is conserved among all RNAs indicated that evolutionary constraints on this region are specific to the RNA component rather than the virus isolate. This indicates that functions other than replication are encoded in the 3′ NTR. Reassortment may have led to the genetic diversity found among CMV strains and contributed to its enormous evolutionary success.

Original languageEnglish (US)
Pages (from-to)3382-3387
Number of pages6
JournalJournal of virology
Volume76
Issue number7
DOIs
StatePublished - Mar 25 2002

Fingerprint

Cucumovirus
Cucumber mosaic virus
Open Reading Frames
open reading frames
RNA
Capsid Proteins
phylogeny
coat proteins
viruses
Viruses
Plant Viruses
Viral Structures
Untranslated RNA
Host Specificity
RNA Viruses
plant viruses
host range
branching
Genome
nucleotide sequences

All Science Journal Classification (ASJC) codes

  • Microbiology
  • Immunology
  • Insect Science
  • Virology

Cite this

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Evolutionary history of Cucumber mosaic virus deduced by phylogenetic analyses. / Roossinck, Marilyn J.

In: Journal of virology, Vol. 76, No. 7, 25.03.2002, p. 3382-3387.

Research output: Contribution to journalArticle

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