photoperiodism

Term ID

GO:0009648

Synonyms

• response to day length
• response to night length
• response to photoperiod

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. (3)

References

• Wikipedia:Photoperiodism

Ontology

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