FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term photoperiodism ID (Ontology) GO:0009648 (Gene Ontology)
Definition Any process that results in a change in state or activity of an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of detection of, or exposure to, a period of light or dark of a given length, measured relative to a particular duration known as the 'critical day length'. The critical day length varies between species.[ ISBN:0582015952 ISBN:0697037754 ISBN:0709408862 ]
Also Known As"response to day length" ; "response to night length" ; "response to photoperiod"
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Genes (FBgn)GO_BIOLOGICAL_PROCESS
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 photoperiodism (all annotations which use CV term, excluding "NOT" statements)
     involved_in | photoperiodism
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  response to radiation
   |__response to light stimulus
       |__photoperiodism  15 rec.
           |__entrainment of circadian clock by photoperiod 14 rec.
           |__long-day photoperiodism
           |   |__long-day photoperiodism, flowering(+)
           |__photoperiodism, flowering
           |   |__long-day photoperiodism, flowering(+)
           |   |__regulation of photoperiodism, flowering(+)
           |   |__short-day photoperiodism, flowering(+)
           |__response to photoperiod, blue light 1 rec.
           |__response to photoperiod, red light
           |__short-day photoperiodism
               |__short-day photoperiodism, flowering(+)
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Is a response to light stimulus
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Synonyms
  • "response to day length" EXACT
    "response to night length" EXACT
    "response to photoperiod" EXACT
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Wikipedia:Photoperiodism