An emerging virus isolated from papaya (Carica papaya) crops in northwestern (NW) Argentina was sequenced and characterized using next-generation sequencing. The resulting genome is 6667-nt long and encodes five open reading frames in an arrangement typical of other potexviruses. This virus appears to be a novel member within the genus Potexvirus. Blast analysis of RNA-dependent RNA polymerase (RdRp) and coat protein (CP) genes showed the highest amino acid sequence identity (67% and 71%, respectively) with pitaya virus X. Based on nucleotide sequence similarity and phylogenetic analysis, the name papaya virus X is proposed for this newly characterized potexvirus that was mechanically transmitted to papaya plants causing chlorotic patches and severe mosaic symptoms. Papaya virus X (PapVX) was found only in the NW region of Argentina. This prevalence could be associated with a recent emergence or adaptation of this virus to papaya in NW Argentina.
Argentina is globally recognized as both producer and exporter of maize, the most important cereal crop in the country. Several potyviruses affect the production of various crops, including maize. In this work, the complete nucleotide sequences of the RNA genome of three potyviruses, johnsongrass mosaic virus (JGMV), maize dwarf mosaic virus (MDMV) and sugarcane mosaic virus (SCMV), isolated from maize were obtained by next‐generation sequencing (Illumina technology). The JGMV, MDMV and SCMV viral genomes were 9780, 9807 and 9729 nucleotides long, respectively. The polyprotein organization of each of potyvirus genome was determined; their sequences showed high values compared with polyprotein sequences of the other isolates reported worldwide (> 76.1% at the nucleotide sequence and > 85% at the amino acid sequence). The results of this work are the first data in Argentina of complete genome sequences of potyviruses obtained from maize and the first obtained for JGMV and MDMV.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.