Fig. 2

Histochemical GUS staining in tissues of PD1-PD9 and CaMV35S transgenic Nicotiana benthamiana. The 2-, 7-, 14-, and 21-day-old seedlings, leaves of 90-day-old plants, and roots, stems and leaves of 60-day-old plants were incubated in staining solution at 37 °C for 3 h. The roots, stems, flowers, fruits and seeds of 90-day-old plants were stained at 37 °C for 24 h. 35S, transgenic tobacco of the CaMV35S promoter. Scale bar of 2-day-old seedlings: 0.1 cm; the other scale bar: 0.5 cm