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The analysis of plant materials such as seeds, seedlings and other units for vegetative propagation that are imported, before planting in the country, routinely transported across international borders, is essential to decrease the imminent risk of introducing exotic pathogens, considered A1 pests. However, this requires the use of reliable positive controls, to prevent any false positives and/or...
An isolate of the Andean strain of potato virus S (PVS), named BB-AND, was detected for the first time in a Brazilian potato crop, fully sequenced and analyzed. A comparison of BB-AND with other PVS isolates (Andean and Ordinary) showed that BB-AND is quite distinct. The lowest amino acid sequence identity to the only other fully sequenced Andean isolate was found in ORF 1 (82%) and ORF 6 (87%). Recombination...
A transient expression system using onion epidermal cells was used to investigate domains of the Tobacco mosaic virus (TMV) 126-kDa replicase protein involved in cellular localization. Initially, a nuclear localization signal (NLS), identified within the amino-terminus of the 126-kDa protein, was investigated for its functionality using fusion constructs containing the green fluorescent protein (GFP)...
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