| 释义 |
Definition of embryo sac in US English: embryo sacnoun 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. Example sentencesExamples - 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 resulting unreduced megaspore then develops through mitoses into an embryo sac that contains unreduced nuclei.
- The sporogenous cells of the ovary lead to the production of the female gametophyte or embryo sac that contains the egg cell.
- Moreover, within an embryo sac, endosperm nuclei were always of the same size, with no typical chalazal cyst formed in endosperms with three or more syncytial mitoses.
Definition of embryo sac in US English: embryo sacnoun 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. Example sentencesExamples - The resulting unreduced megaspore then develops through mitoses into an embryo sac that contains unreduced nuclei.
- During pollination, the vegetative cell serves as a ‘powerhouse’ to deliver the generative cells to the embryo sac (female gametophyte).
- The sporogenous cells of the ovary lead to the production of the female gametophyte or embryo sac that contains the egg cell.
- 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.
- Moreover, within an embryo sac, endosperm nuclei were always of the same size, with no typical chalazal cyst formed in endosperms with three or more syncytial mitoses.
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