The disease agents called viruses appear to be organic substances of such complexity that it is impractical to establish their identity by the classical methods of organic chemistry. However, certain useful methods are available which have been applied very successfully in demonstrating in tobacco mosaic disease that virus activity is a specific property of a high molecular weight nucleoprotein...

Next-generation sequencing (NGS) has been applied to plant virology since 2009. NGS provides highly efficient, rapid, low cost DNA, or RNA high-throughput sequencing of the genomes of plant viruses and viroids and of the specific small RNAs generated during the infection process. These small RNAs, which cover frequently the whole genome of the infectious agent, are 21-24 nt long and are known a...

Southern bean mosaic virus (SBMV) and Tomato ringspot virus (TomRV) were compared with regard to possible ways of interand intracellular translocation. The pore complexes in the nuclear membranes of nuclei in leaf palisade and mesophyll cells of several plant species commonly used in plant virus research were studied. The pore structure resembled that earlier described. The diameter of the pore...

Southern bean mosaic virus (SBMV) and Tomato ringspot virus (TomRV) were compared with regard to possible ways of inter- and intracellular translocation. The pore complexes in the nuclear membranes of nuclei in leaf palisade and mesophyll cells of several plant species commonly used in plant virus research were studied. The pore structure resembled that earlier described. The diameter of the po...

background & aim: ferulago angulata sub. carduchorum (locally name: chavir or chavil) is an important medicinal plant in iran. the powder of aerial parts of this plant contains variety of components with different therapeutical effects such as antioxidant activities (aoa). this study was conducted to investigate the effect of dietary supplementation powder of aerial parts of this plant on t...

This document provides the conclusions of pest survey card that was prepared in context EFSA mandate on plant surveillance (M-2020-0114) at request European Commission. The full for tobacco ringspot virus (TRSV) is published and available online Plant Pest Survey Cards Gallery following link will be updated whenever new information becomes available: https://efsa.europa.eu/plants/planthealth/mo...

Viruses are obligate intracellular symbionts. Plant viruses are often discovered and studied as pathogenic parasites that cause diseases in agricultural plants. However, here it is shown that viruses can extend survival of their hosts under conditions of abiotic stress that could benefit hosts if they subsequently recover and reproduce. Various plant species were inoculated with four different ...

Plant-virus interactions based-studies have contributed to increase our understanding on plant resistance mechanisms, providing new tools for crop improvement. In the last two decades, RNA interference, a post-transcriptional gene silencing approach, has been used to induce antiviral defenses in plants with the help of genetic engineering technologies. More recently, the new genome editing syst...

Virus resistance is a major objective in the development of genetically engineered crops. The biotechnological strategies developed to control plant viruses can be classified into three major categories based on the type of nucleic acid sequence used [1]. The first category makes use of sequences derived from the viral genomes; a concept known as pathogen-derived resistance (PDR). The second in...

Jenny S. Cory* and Judith H. Myers Molecular Ecology and Biocontrol Group, NERC Centre for Ecology and Hydrology, Mansfield Road, Oxford OX1 3SR, UK Department of Zoology and Faculty of Agricultural Sciences, Centre for Biodiversity Research, University of British Columbia, 6270 University Boulevard, Vancouver, Canada *Correspondence and present address: Jenny S. Cory, Laboratory of Virology, W...