Entry from US English dictionary
Definition of embryo sac in English:
A cell inside the ovule of a flowering plant where fertilization occurs and which becomes the female gametophyte, containing the endosperm nucleus and the fertilized ovum that develops into the embryo.
- During pollination, the vegetative cell serves as a ‘powerhouse’ to deliver the generative cells to the embryo sac (female gametophyte).
- Gametophytic apomixis can result from diplospory, in which the unreduced embryo sac originates from a generative cell, or apospory, in which the embryo sac develops from somatic cells of the ovule.
- The sporogenous cells of the ovary lead to the production of the female gametophyte or embryo sac that contains the egg cell.
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