| sequential acquisition of potato virus y strains by myzus persicae favors the transmission of the emerging recombinant strains. | in the past decade recombinant strains of potato virus y (pvy) have overtaken the ordinary strain, pvy(o), as the predominant viruses affecting the us seed potato crop. aphids may be a contributing factor in the emergence of the recombinant strains, but studies indicate that differences in transmission efficiency of individual pvy strains either from single or mixed infections, although variable, are not generally significant. multiple strains of pvy are present in all potato production areas an ... | 2017 | 28666897 |
| potato virus y (pvy) isolates from physalis peruviana are unable to systemically infect potato or pepper and form a distinct new lineage within the pvy(c) strain group. | poha, or cape gooseberry (physalis peruviana l.), is a plant species cultivated in hawaii for fresh fruit production. in 2015, an outbreak of virus symptoms occurred on poha farms in the south kohala district of the island of hawaii. the plants displayed mosaic, stunting, and leaf deformation, and produced poor fruit. initial testing found the problem associated with potato virus y (pvy) infection. six individual pvy isolates, named poha1 to poha6, were collected from field-grown poha plants and ... | 2017 | 28653578 |
| dynamics of pvy strains in field grown potato: impact of strain competition and ability to overcome host resistance mechanisms. | potato virus y (pvy) is the most important viral pathogen affecting potato crops worldwide. pvy can be transmitted non-persistently by aphids that do not colonize the host plant, resulting in a rapid acquisition and transmission of the virus between plants. pvy exists as a complex of strains that can be distinguished according to their pathogenicity, serology and genomic analysis. while virus incidence remains low in scottish seed potato crops, pvy has become the increasingly prevalent virus. th ... | 2017 | 28625667 |
| time-sampled population sequencing reveals the interplay of selection and genetic drift in experimental evolution of potato virus y. | rna viruses are one of the fastest-evolving biological entities. within their hosts, they exist as genetically diverse populations (i.e., viral mutant swarms), which are sculpted by different evolutionary mechanisms, such as mutation, natural selection, and genetic drift, and also the interactions between genetic variants within the mutant swarms. to elucidate the mechanisms that modulate the population diversity of an important plant-pathogenic virus, we performed evolution experiments with pot ... | 2017 | 28592544 |
| comparative genetic diversity of potato virus y populations based on coat protein gene. | potato virus y (pvy) is an important plant pathogen with a wide host range including economically important crops of potato, tobacco, tomato, and pepper. the coat protein gene has been commonly used in studying molecular biology of plant viruses including pvy. in this study, we used a large dataset of cp sequences from isolates collected across the world to assess the detailed molecular evolution of pvy populations with a focus on the iranian pvy population. phylogenetic analysis showed that the ... | 2017 | 28523922 |
| effects of aphidius gifuensis on the feeding behavior and potato virus y transmission ability of myzus persicae. | the stylet penetration behavior of aphids when feeding on plants is associated with virus acquisition and inoculation. aphidius gifuensis (ashmead) is a primary endoparasitoid of myzus persicae (sulzer) which is the most efficient vector of plant viruses. information about the effects of parasitoid on aphid and virus transmission can provide an essential foundation for designing effective biological control strategies. this study aimed to investigate the effects of a. gifuensis on the feeding be ... | 2017 | 28485823 |
| the phylogenetics of the global population of potato virus y and its necrogenic recombinants. | potato virus y (pvy) is a major pathogen of potatoes and other solanaceous crops worldwide. it is most closely related to potyviruses first or only found in the americas, and it almost certainly originated in the andes, where its hosts were domesticated. we have inferred the phylogeny of the published genomic sequences of 240 pvy isolates collected since 1938 worldwide, but not the andes. all fall into five groupings, which mostly, but not exclusively, correspond with groupings already devised u ... | 2017 | 28458913 |
| a recombinant potato virus y infectious clone tagged with the rosea1 visual marker (pvy-ros1) facilitates the analysis of viral infectivity and allows the production of large amounts of anthocyanins in plants. | potato virus y (pvy) is a major threat to the cultivation of potato and other solanaceous plants. by inserting a cdna coding for the antirrhinum majus rosea1 transcription factor into a pvy infectious clone, we created a biotechnological tool (pvy-ros1) that allows infection by this relevant plant virus to be tracked by the naked eye with no need for complex instrumentation. rosea1 is an myb-type transcription factor whose expression activates the biosynthesis of anthocyanin pigments in a dose-s ... | 2017 | 28428782 |