One of the most efficient mechanisms by which plants protect themselves from invading virusesis the specific RNA-dependent silencing pathway termed post-transcriptional gene silencing(PTGS). In this mechanism, resistance to a virus is engineered through the expression of asegment of the virus genomein transgenic plants. Potato VirusY (PVY) is one of the mostdamaging viruses of potato, infecting...

A molecular probe, p3POT, was constructed of PSTVd, PVY, PLRV cDNA fragments introduced into pUC18 vector. Sequencing of the inserts revealed that cloned fragments covered conservative parts of pathogenic genomes. Dot-blot hybridization of digoxigenin-labelled construct to crude extracts from plants infected with different potato viruses proved high sensitivity and specificity of the p3POT prob...

Potato is one of the most important agricultural crops worldwide and known to be susceptible more than 40 viruses in nature. In this research, 298 leaf samples collected from potato fields Afyon, Nevşehir Bolu provinces previous study were used determine affecting production region. The leaves plants showing virus symptoms subjected RT-PCR using virus-specific primers, order detect presence lea...

Microarrays are one of the new emerging methods in plant virology currently being developed by various laboratories. In this study, a new approach is described on the detection of plant viruses using short synthetic single-stranded oligomers (40 nt) instead of PCR products as capture probes. A microchip detecting potato viruses, PVA, PVS, PVM, PVX, PVY and PLRV, in both single and mixed infecti...

Post-transcriptional gene silencing (PTGS) of a green fluorescent protein (GFP) transgene is suppressed in Nicotiana benthamiana plants infected with potato virus Y (PVY) or with cucumber mosaic virus (CMV), but not in plants infected with potato virus X (PVX). By expressing PVY and CMV-encoded proteins in a PVX vector we have shown that the viral suppressors of gene silencing are the HCPro of ...

Risk-assessment studies of virus-resistant transgenic plants (VRTPs) focussing on recombination of a plant virus with a transgenic sequence of a different virus should include a comparison of recombination frequencies between viruses in double-infected non-transgenic plants with those observed in singly infected transgenic plants to estimate recombination incidence in VRTPs. In this study, the ...

Complementary DNA clones representing approximately 6100 nucleotides of potato leafroll virus (PLRV) were generated, restriction-mapped, and partially sequenced. Within one of the cDNA clones an open reading frame (ORF) encoding a 23K protein was identified and further characterized. Amino acid sequence comparison of this protein showed significant homology (47.1%) with the barley yellow dwarf ...

In comparison to single infections, co-infection of Nicotiana benthamiana with Potato virus X (PVX) and Potato virus Y (PVY) or Plum pox virus (PPV), resulted in increased systemic symptoms (synergism in pathology). Previous studies have shown that virus infections affected the accumulation of various microRNAs (miRNAs) and miRNA target genes. Our studies revealed that double infection by PVX a...

In recent years, Potato Virus Y has reemerged as a serious disease problem in many potato production areas in the northern United States and eastern Canada. Three recently introduced cultivars, ‘Russet Norkotah’, ‘Shepody’, and ‘Silverton’ are widely grown and express mild or no symptoms when infected with PVY. The lack of symptoms often associated with these cultivars and novel, recombinant st...