Fig. 2

Observation of the cell development status of poplar and tobacco in vitro culture materials. A Cell development status of poplar leaves at 0, 1, 2, 3, 4, and 5 days of differentiation culture. Bars = 50 μm. B Cell development status of poplar stem segments at 0, 1, 2, 3, 4, and 5 days of differentiation culture. Bars = 500 μm. C Cell development status of tobacco leaves at 0, 1, 2, 3, 4, and 5 days of differentiation culture. Bars = 50 μm