Synergid

Definition

Synergid cells are two specialized cells in the embryo sac of angiosperms, located adjacent to the egg cell. They play a crucial role in guiding the pollen tube for successful fertilization.

5 Must Know Facts For Your Next Test

1. Synergid cells are part of the female gametophyte structure known as the embryo sac.
2. They secrete chemical attractants to guide the pollen tube towards the egg cell.
3. One of the synergid cells often degenerates upon pollen tube entry, facilitating sperm cell release.
4. Synergids contain filiform apparatus that aid in pollen tube reception and guidance.
5. They are critical for double fertilization, a unique feature in angiosperms.

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Related terms

Embryo Sac: The female gametophyte of angiosperms containing eight nuclei and seven cells including one egg cell and two synergids.

Pollen Tube: A tubular structure produced by pollen grains that delivers sperm cells to the ovule for fertilization.

Double Fertilization: A process unique to angiosperms where one sperm fertilizes the egg forming a zygote, while another fuses with polar nuclei to form endosperm.