The megagametophyte within the ovule of a flowering plant.

胚囊 Embryo sac 有花植物胚珠内的雌配子体。

The larger embellum could be used as a secondary screening indicator for identifying aposporous embryo sac in Apluda mutica.

存在发达的胚珠附器是水蔗草无孢子生殖胚囊的特点之一.

Vacuoles in the synergids tended to concentrate mainly in the chalazal region.There was a peak period of lipid formation in the two synergids.

三是助细胞珠心相接胚囊壁有些部位出现十明显的突起，个别突起内有大型嗜锇体。