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Either of two small cells lying in the embryo sac in seed plants adjacent to the egg cell toward the micropylar end.



one of usually two cells that with an egg cell form the egg apparatus of the embryo sac of angiospermous plants. In most plants the synergids are destroyed before fertilization (with the entry of a pollen tube into the embryo sac) or after fertilization. In a few plants they are retained for a long time and turn into haustoria.

References in periodicals archive ?
Thus, it is likely that in ig1 mutants, the non-repressed expression of these genes generate the metabolic alterations needed to promote proliferation in cell types such as synergid or antipodal cells, and embryogenesis in embryo-producing cells such as the egg and the sperm cells after pollen discharge.
This mutation is located on chromosome arm 3L and has as a direct effect an increased number of nuclear divisions before cellularization of the embryo sac, which generates in the embryo sac an indeterminate, extra number of micropylar and synergids cells, egg cells, central cells, and polar nuclei within central cells (Evans, 2007; Guo et al.
Molecules called cysteine-rich proteins, or CRPs, were most common on the synergid cells.