Figure 1.

Assessment of the PTGS mechanism with gus-specific siRNA detection by Northern blot in different rice varieties at different stages of plant development. The rice plants used were Tai; non transgenic cv. Taipei, L4; a transgenic gus-expressing line, L10; a gus-silenced transgenic line revealed by histochemical staining collected at 15, 20, 37 and 42 days after seeding (das). EtBr staining of rRNA served as a loading control.