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ONTOLOGY REPORT - ANNOTATIONS


Term:megagametogenesis
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Accession:GO:0009561 term browser browse the term
Definition:The process whose specific outcome is the progression of the embryo sac over time, from its formation as the megaspore to the mature structure. The process begins when three of the four haploid 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.
Synonyms:exact_synonym: embryo sac development from the megaspore;   megagametophyte nucleus division
 synonym: Not4Curation
 xref: Wikipedia:Megagametogenesis
 only_in_taxon: NCBITaxon:3398 ! Magnoliophyta



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Term paths to the root
Path 1
Term Annotations click to browse term
  biological_process 18872
    multicellular organismal process 8890
      megagametogenesis 0
        antipodal cell degeneration 0
        antipodal cell differentiation + 0
        embryo sac cellularization 0
        embryo sac central cell differentiation + 0
        embryo sac egg cell differentiation + 0
        embryo sac morphogenesis 0
        embryo sac nuclear migration + 0
        synergid differentiation + 0
Path 2
Term Annotations click to browse term
  biological_process 18872
    developmental process 6918
      anatomical structure development 6392
        multicellular organism development 5454
          gametophyte development 0
            embryo sac development 0
              megagametogenesis 0
                antipodal cell degeneration 0
                antipodal cell differentiation + 0
                embryo sac cellularization 0
                embryo sac central cell differentiation + 0
                embryo sac egg cell differentiation + 0
                embryo sac morphogenesis 0
                embryo sac nuclear migration + 0
                synergid differentiation + 0
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