At late stage of cellularization, egg, and synergids were polarized, large amount of vesicles fused with membrane to join the formation of cell wall and filiform apparatus.

• 细胞化后期, 卵、助细胞出现极性分化, 胞质中的众多小泡与细胞膜融合, 参与细胞壁及丝状器的建成；