Maps of plasmids used in this project. The T-DNA regions of binary plasmids used in this project are represented. Block arrow, CaMV duplicated 35S promoter. Black box, CaMV polyA signal sequence/terminator. Dark gray box, Tobacco etch virus 5′-nontranslated leader sequence. Light gray box, Ribozyme. Bent arrows, Subgenomic promoters. ORFs are represented by white boxes. Identities of ORFs are labeled in white boxes. Replicase, TMV 126K/183K ORF; MP, movement protein; P19, 19-kD RNA-silencing suppressor gene from Tomato bushy stunt virus.