The question of Citrus viroid IV as a Cocadviroid

The question of Citrus viroid IV as a Cocadviroid It has been suggested that Citrus viroid IV (CVd-IV) be classified as a species within the genus Cocadviroid . This relationship was based on the presence of a terminal conserved hairpin (TCH) and absence of a terminal conserved region (TCR) as specific structural motifs in common with isolates of Coconut cadang-cadang viroid (CCCVd) as well as phylogenetic relationships with members of the genus Cocadviroid . Evidence is presented for a “vestigial” TCR in CVd-IV as well as the introduction of the terminal repeat region (TRR) motif and an alternative sequence analysis that suggests a closer phylogenetic relationship of CVd-IV to isolates of Citrus exocortis viroid (CEVd), a species within the genus Pospiviroid than to CCCVd. This position is further supported by the striking similarity of biological properties between CVd-IV and CEVd with the suggestion offered that biological evidence be considered for specific adjustments to any overall classification scheme for viroids. Archives of Virology Springer Journals

The question of Citrus viroid IV as a Cocadviroid

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Copyright © 2005 by Springer-Verlag/Wien
Biomedicine; Medical Microbiology; Virology; Infectious Diseases
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