A Mixed Infection of Helenium Virus S With Two Distinct Isolates of Butterbur Mosaic Virus, One of Which Has a Major Deletion in an Essential Gene.

Multiple carlaviruses infect various ornamental plants, often having limited host ranges and causing minor symptoms, yet often reducing yield or quality. In this study we have identified a mixed infection of butterbur mosaic virus (ButMV) and helenium virus S (HelVS) from a plant of veronica ( sp.) showing foliar mosaic and distortion.

ICTV Virus Taxonomy Profile: .

is a family of non-enveloped reverse-transcribing plant viruses with non-covalently closed circular dsDNA genomes of 7.1-9.8 kbp in the order .

Complete nucleotide sequence of clematis chlorotic mottle virus, a new member of the family Tombusviridae.

Clematis chlorotic mottle virus (ClCMV) is a previously undescribed virus associated with symptoms of yellow mottling and veining, chlorotic ring spots, line pattern mosaics, and flower distortion and discoloration on ornamental Clematis. The ClCMV genome is 3,880 nt in length with five open reading frames (ORFs) encoding a 27-kDa protein (ORF 1), an 87-kDa replicase protein (ORF 2), two centrally located movement proteins (ORF 3 and 4), and a 37-kDa capsid protein (ORF 5). Based on morphological, genomic, and phylogenetic analysis, ClCMV is predicted to be a member of the genus Pelarspovirus in the family Tombusviridae.

Characterization and complete genome sequence of a panicovirus from Bermuda grass by high-throughput sequencing.

Bermuda grass samples were examined by transmission electron microscopy and 28-30 nm spherical virus particles were observed. Total RNA from these plants was subjected to high-throughput sequencing (HTS). The nearly full genome sequence of a panicovirus was identified from one HTS scaffold.

Complete nucleotide sequence of rose yellow leaf virus, a new member of the family Tombusviridae.

The genome of the rose yellow leaf virus (RYLV) has been determined to be 3918 nucleotides long and to contain seven open reading frames (ORFs). ORF1 encodes a 27-kDa peptide (p27). ORF2 shares a common start codon with ORF1 and continues through the amber stop codon of p27 to encode an 87-kDa (p87) protein that has amino acid similarity to the RNA-dependent RNA polymerase (RdRp) of members of the family Tombusviridae.

Complete nucleotide sequence of Rosa rugosa leaf distortion virus, a new member of the family Tombusviridae.

This report describes the complete nucleotide sequence and genome organization of Rosa rugosa leaf distortion virus (RrLDV), the causal agent of a previously undescribed virus disease of Rosa rugosa. The RrLDV genome is a positive-sense ssRNA, 3971 nucleotides in length, containing five open reading frames (ORFs). ORF1 encodes a 27-kDa peptide (p27).

Complete nucleotide sequence of rose yellow mosaic virus, a novel member of the family Potyviridae.

The complete genomic sequence of rose yellow mosaic virus (RoYMV) was determined and found to have all the features that are characteristic of members of the family Potyviridae. The RoYMV genome is 9508 nucleotides long excluding the 3'-poly-(A) tail and contains a single open reading frame encoding a polyprotein of 3067 amino acids. The RoYMV P3 and CI cistrons are shorter than those of other members of the family Potyviridae, and the 6K1 cistron is completely absent.

Complete nucleotide sequence of rose yellow vein virus, a member of the family Caulimoviridae having a novel genome organization.

This report describes the complete nucleotide sequence and genome organization of rose yellow vein virus (RYVV), a proposed new member of the family Caulimoviridae. The RYVV genome is 9314 bp in size and contains eight open reading frames (ORFs). ORFs 1, 2, and 3 have 22-38 % amino acid sequence similarity to known members of the family Caulimoviridae.

Identification and Properties of a Carlavirus Causing Chlorotic Mottle of Florists' Hydrangea (H. macrophylla) in the United States.

A previously uncharacterized virus with flexuous filamentous particles 660 nm in length was identified in the United States in florists' hydrangea (Hydrangea macrophylla), in which it caused chlorotic mottling, leaf deformation, and discoloration. The virus, tentatively named Hydrangea chlorotic mottle virus (HdCMV), was transmitted readily by mechanical inoculation and by Myzus persicae, but infected only H. macrophylla.

Studies on biology and genomic characterization of a caulimo-like virus associated with a leaf distortion disease of Lamium maculatum.

A virus associated with leaf distortion of Lamium maculatum had features characteristic of caulimoviruses. The viral genome (Genbank accession number: EU554423) is 7,713 bp in size, with six open reading frames similar in size and organization to those of known caulimoviruses. Phylogenetic analyses based on the conserved ORF V polyprotein coding region indicated that the Lamium virus is a possible new member of the genus Caulimovirus.

Identification and Characterization of a Carlavirus Causing Veinal Necrosis of Coleus.

A filamentous virus identified in coleus (Coleus × hybrida) in Minnesota and New York was found to cause veinal necrosis in coleus, although this symptom was observed only under certain conditions. The virus was transmitted readily by mechanical inoculation to coleus and Nicotiana spp. and was not transmitted by Myzus persicae.

Phylogeography of Ustilago maydis virus H1 in the USA and Mexico.

Ustilago maydis virus H1 (Umv-H1) is a mycovirus that infects Ustilago maydis, a fungal pathogen of maize. As Zea mays was domesticated, it carried with it many associated symbionts, such that the subsequent range expansion and cultivation of maize should have affected maize symbionts' evolutionary history dramatically. Because transmission of Umv-H1 takes place only through cytoplasmic fusion during mating of U.

Viral sequences integrated into plant genomes.

Sequences of various DNA plant viruses have been found integrated into the host genome. There are two forms of integrant, those that can form episomal viral infections and those that cannot. Integrants of three pararetroviruses, Banana streak virus (BSV), Tobacco vein clearing virus (TVCV), and Petunia vein clearing virus (PVCV), can generate episomal infections in certain hybrid plant hosts in response to stress.