Open AccessBeet yellows virus : the importance of being different
Author(s) -
Dolja Valerian V.
Publication year - 2003
Publication title -
molecular plant pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.945
H-Index - 103
eISSN - 1364-3703
pISSN - 1464-6722
DOI - 10.1046/j.1364-3703.2003.00154.x
Subject(s) - biology , subgenomic mrna , orfs , capsid , virology , nicotiana benthamiana , plant virus , rna , closterovirus , virus , genetics , gene , peptide sequence , open reading frame
SUMMARY Taxonomic relationship: Type member of the genus Closterovirus , family Closteroviridae . A member of the alphavirus‐like supergroup of positive‐strand RNA viruses. Physical properties: Virions are flexuous filaments of ∼1300 nm in length and ∼12 nm in diameter that are made up of a ∼15.5 kb RNA and five proteins. The major capsid protein forms virion body of helical symmetry that constitutes ∼95% of the virion length. The short virion tail is assembled by the minor capsid protein, Hsp70‐homologue, ∼64‐kDa protein, and ∼20‐kDa protein. Viral proteins: The 5′‐most ORFs 1a and 1b encode leader proteinase and RNA replicase. The remaining ORFs 2–8 are expressed by subgenomic mRNAs that encode 6‐kDa membrane protein, Hsp70 homologue, ∼64‐kDa protein, minor and major capsid proteins, ∼20‐kDa protein, and ∼21‐kDa protein, respectively. Hosts: The principal crop plants affected by Beet yellows virus (BYV) are sugar beet ( Beta vulgaris ) and spinach ( Spinacea oleracea ). In addition, BYV was reported to infect ∼120 species in 15 families. Most suitable propagation species are Nicotiana benthamiana , Tetragonia expansa , and Claytonia perfoliata .