| OBO ID: GO:0009648 |
| Term Name: | photoperiodism | Search Ontology: | |
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| 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) | ||
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| Ontology: | GO: Biological Process QuickGO AmiGO |
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