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GO:0009561 megagametogenesis

Term Information

ID GO:0009561
Name megagametogenesis
Ontology Biological Process
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.
GONUTS GO:0009561 Wiki Page

Synonyms

Synonyms are alternative words or phrases closely related in meaning to the term name, with indication of the relationship between the name and synonym given by the synonym scope. Click on the icon for more details.
Type Synonym
exact megagametophyte nucleus division
exact embryo sac development from the megaspore

Taxon Constraints

The use of this term should conform to the following taxon constraints:
Taxon Rule Ancestor GO ID Ancestor GO Term Name Relationship Taxon ID Taxon Reference(s)
GOTAX:0000146 GO:0009561 megagametogenesis only_in_taxon 3398 Magnoliophyta
GOTAX:0000299 GO:0032501 multicellular organismal process only_in_taxon 2759 Eukaryota
GOTAX:0000404 GO:0048229 gametophyte development only_in_taxon 3398 Magnoliophyta
GOTAX:0000537 GO:0032501 multicellular organismal process never_in_taxon 4932 Saccharomyces cerevisiae
GOTAX:0000538 GO:0032501 multicellular organismal process never_in_taxon 4896 Schizosaccharomyces pombe
More information on taxon constraints in GO is available here

Cross-references

Database ID
Wikipedia Megagametogenesis

Ancestor Chart

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Child Terms

This table lists all terms that are direct descendants (child terms) of GO:0009561:
Relationship To GO:0009561 Child Term Child Term Name
Part of GO:0009557 antipodal cell differentiation
Part of GO:0009558 embryo sac cellularization
Part of GO:0009559 embryo sac central cell differentiation
Part of GO:0009560 embryo sac egg cell differentiation
Part of GO:0009562 embryo sac nuclear migration
Part of GO:0009563 synergid differentiation
Part of GO:0048314 embryo sac morphogenesis
Part of GO:0055045 antipodal cell degeneration

Protein Annotation

Displaying annotations FIRST to LAST of TOTAL Page size: Additional filters: Bookmarkable link
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Gene Product ID
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GO Identifier
GO Term Name
Aspect
Original GO ID
Original GO Term Name
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Co-occurring Terms

These tables show the number of times the term listed in the table has been co-annotated with GO:0009561. The terms are listed in descending order of number of times the term has been co-annotated.
The table on the left is calculated using both electronic and manual-evidenced annotations, while the table on the right is calculated using only manual-evidenced annotations.
Co-occurrence statistics for GO:0009561 based on the entire annotation set Co-occurrence statistics for GO:0009561 based on non-IEA annotations only

Change Log

All changes

Timestamp Action Category Detail
2013-11-28 Added RELATION is a GO:0044767 (single-organism developmental process)
2013-11-28 Deleted RELATION is a GO:0032502 (developmental process)
2012-12-20 Added RELATION is a GO:0044707 (single-multicellular organism process)
2009-03-15 Added XREF Wikipedia:Megagametogenesis
2008-05-13 Added 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.
2008-05-12 Deleted 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.
2008-04-01 Added SYNONYM embryo sac development from the megaspore
2008-04-01 Updated RELATION is a GO:0032502 (developmental process)
2008-04-01 Updated RELATION part of GO:0009553 (embryo sac development)
2007-08-09 Added SYNONYM megagametophyte nucleus division
2007-08-09 Deleted SYNONYM megagametophyte nucleus division
2007-04-20 Updated 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.
2007-04-01 Updated TERM megagametogenesis
2005-02-12 Updated DEFINITION The partitioning of a megagametophyte nucleus and its genetic information.
2004-11-09 Added DEFINITION The partition of a megagametophyte nucleus and its genetic information.
2004-11-09 Added SYNONYM megagametophyte nucleus division
2002-04-11 Added TERM megagametophyte nuclear division

Term

Timestamp Action Category Detail
2007-04-01 Updated TERM megagametogenesis
2002-04-11 Added TERM megagametophyte nuclear division

Definition/synonyms

Timestamp Action Category Detail
2008-05-13 Added 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.
2008-05-12 Deleted 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.
2008-04-01 Added SYNONYM embryo sac development from the megaspore
2007-08-09 Added SYNONYM megagametophyte nucleus division
2007-08-09 Deleted SYNONYM megagametophyte nucleus division
2007-04-20 Updated 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.
2005-02-12 Updated DEFINITION The partitioning of a megagametophyte nucleus and its genetic information.
2004-11-09 Added DEFINITION The partition of a megagametophyte nucleus and its genetic information.
2004-11-09 Added SYNONYM megagametophyte nucleus division

Relationships

Timestamp Action Category Detail
2013-11-28 Added RELATION is a GO:0044767 (single-organism developmental process)
2013-11-28 Deleted RELATION is a GO:0032502 (developmental process)
2012-12-20 Added RELATION is a GO:0044707 (single-multicellular organism process)
2008-04-01 Updated RELATION is a GO:0032502 (developmental process)
2008-04-01 Updated RELATION part of GO:0009553 (embryo sac development)

Cross-references

Timestamp Action Category Detail
2009-03-15 Added XREF Wikipedia:Megagametogenesis
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