نتایج جستجو برای: turnip curly top virus
تعداد نتایج: 522871 فیلتر نتایج به سال:
Potyviruses have variable single-stranded RNA genomes and many show clear evidence of recombination. This report studied the distribution of recombination sites in the genomes of 92 isolates of the potyvirus Turnip mosaic virus (TuMV); 42 came from the international gene sequence databases and an additional 50 complete genomic sequences were generated from field samples collected in Europe and ...
Recombination between RNAs associated with turnip crinkle virus is thought to occur during plus-strand synthesis at motifs resembling the 5'-ends of genomic, subgenomic and satellite RNAs. Common structural regions encompassing the motifs have been found for major crossover sites on two different minus-strand templates, with junctions preferentially located in a single-stranded region at the 3'...
In addition to regulating gene expression, RNA silencing is an essential antiviral defense system in plants. Triggered by double-stranded RNA, silencing results in degradation or translational repression of target transcripts. Viruses are inducers and targets of RNA silencing. To condition susceptibility, most plant viruses encode silencing suppressors that interfere with this process, such as ...
A protoplast infection assay has been used to reliably examine the viral RNA encapsidation of turnip crinkle virus (TCV). Analysis of the encapsidation of various mutant viral RNAs revealed that a 186-nucleotide (nt) region at the 3' end of the coat protein (CP) gene, with a bulged hairpin loop of 28 nt as its most essential element, was indispensable for TCV RNA encapsidation. When RNA fragmen...
turnip mosaic virus (tumv), cauliflower mosaic virus (camv) and beet western yellow virus (bwyv) are considered as the most important viruses of canola, worldwide. in order to determine the distribution of these viruses in golestan province, samples from three important canola growing areas of the province were collected during 2008 and 2009. the randomly collected samples were tested for the p...
Since Wingard (^4) ^ reported that tobacco plants that had recovered from severe stages of the ring spot disease failed to show the usual disease symptoms when reinoculated with the ring spot virus, similar reactions have been observed in several other plant viruses, including curly top (4, i^, ^i). Price (la) has presented an extensive and detailed review of this subject. The term ' ^recovery'...
Sucrose gradient centrifugation of heat-denatured RNA of turnip yellow mosaic virus permitted the isolation of five RNA classes with molecular weights ranging from 2.0 to 0.25 X 10(6). The infectivity was shown to be confined to an RNA molecule of molecular weight 2.0 X 10(6). No significant increase in infectivity was obtained by combination of the latter RNA with the RNA classes of smaller si...
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