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ONTOLOGY REPORT - ANNOTATIONS


Term:embryo sac development
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Accession:GO:0009553 term browser browse the term
Definition:The process whose specific outcome is the progression of the embryo sac over time, from its formation to the mature structure. The process begins with the meiosis of the megasporocyte to form four haploid megaspores. Three of the megaspores disintegrate, and the fourth undergoes mitosis giving rise to a binucleate syncytial embryo sac. The two haploid nuclei migrate to the opposite poles of the embryo sac and then undergo two rounds of mitosis generating four haploid nuclei at each pole. One nucleus from each set of four migrates to the center of the cell. Cellularization occurs, resulting in an eight-nucleate seven-celled structure. This structure contains two synergid cells and an egg cell at the micropylar end, and three antipodal cells at the other end. A binucleate endosperm mother cell is formed at the center. The two polar nuclei fuse resulting in a mononucleate diploid endosperm mother cell. The three antipodal cells degenerate.
Synonyms:exact_synonym: female gametophyte development
 synonym: Not4Curation
 alt_id: GO:0048230



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Term paths to the root
Path 1
Term Annotations click to browse term
  biological_process 18877
    multicellular organismal process 8892
      multicellular organism development 5454
        gametophyte development 0
          embryo sac development 0
            megagametogenesis + 0
            megasporogenesis 0
Path 2
Term Annotations click to browse term
  biological_process 18877
    developmental process 6926
      anatomical structure development 6400
        multicellular organism development 5454
          gametophyte development 0
            embryo sac development 0
              megagametogenesis + 0
              megasporogenesis 0
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