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A process that is carried out at the cellular level which results in the assembly, arrangement of constituent parts, or disassembly of the nucleus. The merging of the polar nuclei, the two nuclei contained within the same cell that are created from the mitotic division of the megaspore during angiosperm reproduction. Polar nuclear fusion takes place in the ovule, forming in the fusion nucleus and giving rise to the endosperm when fertilized. The creation of a single nucleus from multiple nuclei as a result of fusing the lipid bilayers that surround each nuclei. The process whereby the two uncellularized polar nuclei cellularize, fuse and acquire the specialized features of a mononucleate diploid central cell. The creation of a single organelle from two or more organelles. The process whereby relatively unspecialized cells, e.g. embryonic or regenerative cells, acquire specialized structural and/or functional features that characterize the cells, tissues, or organs of the mature organism or some other relatively stable phase of the organism's life history. Differentiation includes the processes involved in commitment of a cell to a specific fate and its subsequent development to the mature state. 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.

View Gene Ontology (GO) Term

GO TERM SUMMARY

Name: polar nucleus fusion
Acc: GO:0010197
Aspect: Biological Process
Desc: The merging of the polar nuclei, the two nuclei contained within the same cell that are created from the mitotic division of the megaspore during angiosperm reproduction. Polar nuclear fusion takes place in the ovule, forming in the fusion nucleus and giving rise to the endosperm when fertilized.
Proteins in PDR annotated with:
   This term: 20 [Search]
   Term or descendants: 20 [Search]


[geneontology.org]
INTERACTIVE GO GRAPH

GO:0010197 - polar nucleus fusion (interactive image map)

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