Lettuce infectious yellows virus (LIYV) is the type member of the genus Crinivirus in the family Closteroviridae. Like many other positive-strand RNA viruses, LIYV infections induce a number of cytopathic changes in plant cells, of which the two most characteristic are: Beet yellows virus-type inclusion bodies composed of vesicles derived from cytoplasmic membranes; and conical plasmalemma depo...

The self-replicating polerovirus-associated RNAs have recently been classified as tombusvirus-like associated (tlaRNAs). In a metagenomic comparison of the virome wild (Daucus carota subsp. carota) and cultivated (D. sativus) carrots, four tlaRNAs were identified: carrot red leaf virus-associated RNA (CtRLVaRNA), beet western yellows (BWYVaRNA), two other detected for first time in arracacha la...

Raspberry mosaic is one of the most important viral diseases of raspberry. Four virus and virus-like agents, two of which are poorly characterized, have been implicated in the disease complex based on symptom development in Rubus indicators. Three novel viruses were identified in a red raspberry plant that caused typical raspberry mosaic symptoms when grafted onto indicators. This communication...

The genome of beet yellows virus (BYV), the type representative of the closterovirus group, encodes a homologue of the cellular heat-shock protein (HSP) 70 family. A pair of degenerate primers targeted to motifs A and E, which are highly conserved in HSP70s, was synthesized. Genomes of several definite and possible members of the closterovirus group were screened for the presence of the HSP70 g...