Fig. 1

Phenotypic characterization of fertile and sterile buds and the dynamic SEM analysis of pollen grains. a, CK, control materials. CHA, the materials treated with SX-1. b, Length of anther, filament and pistil, and width of petal in opened flowers (Student’s t test, *P < 0.05, **P < 0.01). c-f, k-n, s and u, The pollen grains in control. g-j, o-r, t and v, The pollen grains in CHA treated materials. Scale bar in h-j, p-r,10 μm. Scale bar in c-g, k-o, s and t, 5 μm. Scale bar in u and v, 2 μm