Fig. 1 Schematic representation of plasmid constructs used in this study. Ubi, maize ubiquitin promoter; nos, terminator of nopaline synthetase; 35S or P-35S, 35S promoter of cauliflower mosaic virus; T-35S, 35S terminator of cauliflower mosaic virus; tml, transcription terminator of a tumor morphology large gene. H, HindIII; P, PstI; E, EcoRI; B, BamHI; S, SmaI