Figure 1

Microscope observation and statistical analysis of the heat treated Topas microspores in vitro.
(A) 0 h microspores, (B) 18 °C 6 h treatment, (C) 32 °C 6 h treatment, (D) the mean diameters of swollen microspores (SM) and unswollen microspores (UM), (E) the frequency of SM. Small picture presenting in bottom left in (A) was the DAPI staining result.