Figure 5
From: Factors affecting quantity of pollen dispersal of spray cut chrysanthemum (Chrysanthemum morifolium)
Pollen abortion during pollen development of ‘Noa’. (A) Late microspore stage, showing rupture of cell wall and disintegration of cytoplasm (arrows). (B) Early microspore stage, showing rupture of the primary cell wall, shrinkage of cytoplasm and the nucleus which was in irregularly shaped. (C) Microspore in early stage of development, cell wall and cytoplasm were in degradation. (D) Distortion of cell wall of microspore and shrinkage of cytoplasm. (E-H) Pollen abortion in late pollen development stage (arrows).