... hybridization of sensestrand (5¢-GTTGCTCTGGAAAACTCATTT-3¢) and anti-sense strand (5¢-ATGAGTTTTCCAGAGCAACTT-3¢), and siRNA was synthesized using DNA templates (sense strand,5¢-AAATGAGTTTTCCAGAGCAACCCTGTCTC-3¢; ... cases of long dsRNA (89%), longdsDNA (84%), and siRNA (89%), and less efficientfor siDNA (70%), whereas long scrambled dsDNA and short antisense and sense ssDNAs had no effecton viral expression ... with TMV and either 22 nucleotide sense strand DNA, 20 nucleotide antisensestrand DNA, 470 bp dsDNA, or siRNA. Tobacco leaves with symptoms of TMV infection are shown. Uninfected plants and plants...