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Any process specifically pertinent to the functioning of integrated living units: cells, tissues, organs, and organisms. A process is a collection of molecular events with a defined beginning and end. A biological process whose specific outcome is the progression of an integrated living unit: an anatomical structure (which may be a subcellular structure, cell, tissue, or organ), or organism over time from an initial condition to a later condition. The process whose specific outcome is the progression of the pollen grain over time, from its formation as the microspore to the mature structure. The process whereby a relatively unspecialized cell acquires specialized features of a generative cell. The generative cell gives rise to the sperm cells in the male gametophyte. The process whose specific outcome is the progression of the pollen grain over time, from its formation to the mature structure. The process begins with the meiosis of the microsporocyte to form four haploid microspores. The nucleus of each microspore then divides by mitosis to form a two-celled organism, the pollen grain, that contains a tube cell as well as a smaller generative cell. The pollen grain is surrounded by an elaborate cell wall. In some species, the generative cell immediately divides again to give a pair of sperm cells. In most flowering plants, however this division takes place later, in the tube that develops when a pollen grain germinates. The process whereby a relatively unspecialized cell acquires specialized features of a haploid sperm cell within the plant gametophyte. The process whose specific outcome is the progression of the gametophyte over time, from its formation to the mature structure. The gametophyte is the gamete-producing individual or phase in the life cycle having alternation of generations. An example of this process is found in Arabidopsis thaliana. The process whereby a relatively unspecialized cell acquires specialized features of a vegetative cell. The vegetative cell is gives rise to the pollen tube.

View Gene Ontology (GO) Term

GO TERM SUMMARY
Name: microgametogenesis
Acc: GO:0055046
Aspect: Biological Process
Desc: The process whose specific outcome is the progression of the pollen grain over time, from its formation as the microspore to the mature structure.
Synonyms:
  • pollen development from the microspore
Proteins in PDR annotated with:
   This term: 8 [Search]
   Term or descendants: 19 [Search]


[geneontology.org]
INTERACTIVE GO GRAPH

GO:0055046 - microgametogenesis (interactive image map)
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